CN1694328A - Paired multi-layered dielectric independent passive component architecture - Google Patents

Paired multi-layered dielectric independent passive component architecture Download PDF

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Publication number
CN1694328A
CN1694328A CN 200510065061 CN200510065061A CN1694328A CN 1694328 A CN1694328 A CN 1694328A CN 200510065061 CN200510065061 CN 200510065061 CN 200510065061 A CN200510065061 A CN 200510065061A CN 1694328 A CN1694328 A CN 1694328A
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China
Prior art keywords
electrode
plate
filter
battery lead
median plate
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CN 200510065061
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Chinese (zh)
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安东尼·A·安东尼
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XZY ATTENUATORS LLC
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XZY ATTENUATORS LLC
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Priority claimed from US09/008,769 external-priority patent/US6097581A/en
Application filed by XZY ATTENUATORS LLC filed Critical XZY ATTENUATORS LLC
Publication of CN1694328A publication Critical patent/CN1694328A/en
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Abstract

The present invention relates to a passive electronic component architecture (10) employed in conjunction with various dielectric and combinations of dielectric materials (16) to provide one or more differential and common mode filters for the suppression of electromagnetic emissions and surge protection. The architecture allows single or multiple components to be assembled within a single package such as an integrated circuit or connector. The component's architecture is dielectric independent and provides for integration of various electrical characteristics within a single component to perform the functions of filtering, decoupling, fusing and surge suppression, alone or in combination.

Description

The independent passive component architecture of Paired multi-layered dielectric
The application be submitted on September 19th, 2000, international filing date is January 16, application number in 1999 the dividing an application for the application for a patent for invention of " can produce the independent passive component architecture of the Paired multi-layered dielectric of differential mode and common mode filtering with surge protection in an integrated package " that be 99804153.X, denomination of invention.
Technical field
What the present invention relates to is that the protection electronic circuit is avoided the interference of electromagnetic field (EMI), overvoltage and prevented the filter of electromagnetic radiation.More particularly, what the present invention relates to is a multifunction electric sub-element, the electromagnetic radiation that comes from other signal sources or produced in electronic circuit inside by differential mode and common mode current that its physical structure can suppress not expect to have.In addition, because the physical structure and the material component of electronic component, overvoltage surge protection and magnetic characteristic can merge with differential mode and common mode filtering fully.
Background technology
Present most of electronic instruments of producing, especially include the miniaturized element that realizes new high-speed functions in computer, communication system, automobile, military monitoring instrument, sound equipment and home entertainment device, TV and other equipment and be electrically connected according to its raw materials for production or its size, its size is very responsive to the parasitic electric energy that the transient voltage that occurs on electromagnetic interference or the electric wire produces.Thereby transient voltage can be badly damaged or be destroyed and as microelectronic element or electrical connection electronic instrument is not worked, and a large amount of funds of needs carry out a large amount of repairings or replacing.
The electrical Interference of EMI or RFI form can be by in such signal source such as radio broadcasting antenna or other electromagnetic wave generators introducing electric wire.EMI also can be shielded the circuit generation of EMI by needs.Differential mode and common mode current result from cable and the printing circuit board line usually.Under many circumstances, play the conductor emission electromagnetic field of antenna effect by these.The radiation that must control these conductor/reflectors stops and produces or other circuit of the noise-sensitive do not expected or other parts of circuit are interfered with each other.Other interference sources are produced by the instrument with electric wire coupling, and as computer, mains switch and other each systems, they can produce very big interference, and expectation is eliminated these and disturbed to satisfy in the world the requirement to radiation and/or susceptibility.
The transient voltage that appears on the electric wire can be introduced by the lightning that produces a large amount of electromotive forces in very short time.Similarly, nuclear electromagnetic pulse (EMP) is producing bigger due to voltage spikes in the faster rise time pulse on the very wide frequency range, and this is harmful to most equipment.It is relevant that other big transient voltage sources and power supply at some electronic power instruments open or close the voltage surge that occurs, and causes that by the change of the earth potential energy ground return circuit disturbs simultaneously.Existing protection equipment, initial is protected according to structure and raw material, and can not adequately protect to single integrated package.
Based on above-mentioned known electromagnetic radiation and transient voltage surge phenomenon, designed various filters and surge restraint circuit structure, this can clearly find out from prior art.The detailed description of the various inventions of prior art is disclosed in U.S. Patent number 5,142, in 430, here as a reference.
What ' 430 patents itself were described is power line filter and surge protection circuit element and circuit, and they are used for electric apparatus and realize equipment protection.Circuit element comprises the wafer or the disc of the material of electrical characteristic with expectation such as rheostat or capacitance characteristic.Disc has electrode pattern and forms insulating tape at element surface jointly with aperture above it, thereby element can be easily and effectively be electrically connected with the electric conductor of system.These electrode patterns are connected to each other, and under the situation between two electrode grids, these electrode grids form public electrode at material.' 430 patents are at first at dual-hinge line filtering.The present invention improves and has improved this notion of dual-hinge line, because the present invention is used to adopt the data telecommunication line of low-voltage low current and directly towards having high-tension industry and domestic. applications device, as three phase supply line, noise of motor filtering, LAN and computer and electronic equipment.
Therefore, at the defective that exists in the aforesaid prior art, the present invention has been proposed here.
Summary of the invention
According to the above, we find to provide a multifunction electric sub-element, the electromagnetic radiation that differential mode in its attenuator circuit, single line, two-wire and the rope-lay strand and common mode current cause.Because the sensitivity characteristic of electronic technology also needs to be integrated with the em filtering device of surge protection to eliminate the sensitivity to the overvoltage and the radiation of external source.Since today electronics industry high competition, make this differential mode and common-mode filter/Surge Protector must be cheaply, microminiaturization, expense is low and can highly be integrated in the most of electronic products.
Therefore, main purpose of the present invention provides a kind of multifunction electric sub-element of making and using of being easy to, and it can filter the electromagnetic radiation that is produced by differential mode and common mode current.
Another object of the present invention provides a kind of protective circuit device, and it can be produced in a large number and can encapsulate one or more protective circuits so that the protection to transient voltage, overvoltage and electromagnetic interference to be provided in a component element.
Another object of the present invention provides the protective circuit that has internally, and it provides a path that weakens EMI and overvoltage and will mixed electronic element and circuit or be coupled greatly.
These and other purposes of the present invention and advantage realize that by adopt a plurality of common ground conductive plates at the corresponding electrode panel area battery lead plate is had the material of arbitrary or a plurality of electric property combination and separates.By conductor pair with the coupling of common ground conductive plate and select conductor and battery lead plate coupling, line and line and line and element be coupled and realize differential mode and filtering of common mode electromagnetic interference and/or surge protection.Circuit arrangement comprises that at least one linear circuit element of adjusting is as pole plate.Electrode pattern produces on a surface of pole plate, then the electric conductor electrical couplings of electrode surface and circuit.Electrode pattern, used insulating material and common ground conductive plate produce common port between the electrode of electric conductor, the electric component that it is coupled with the electric component of line between the electric conductor and line coupling and line and ground is from balance of each electrically conducting generation (equate but reverse) circuit arrangement.
The electrical characteristic of differential mode and common-mode filter depends on material and the shielding of used ground between the selected battery lead plate, and it is protected battery lead plate in one or more faraday cells effectively.If chosen a kind of special insulating material, the filter that obtains will mainly be a capacitive device.Insulating material and battery lead plate and common ground conductive plate will produce the electric capacity of a line and line and the electric capacity on line and ground jointly in each electric conductor.If with metal oxide varistor (MOV) material, then this filter will be a capacitive filter, its overcurrent and surge protection characteristic are produced by MOV section bar material.Common ground conductive plate and battery lead plate will form line and line once more with the capacitive plate of line with ground, it provides differential mode and common mode filtering under the situation of high transient voltage.Under these conditions, MOV type rheostat material is a nonlinear resistance that is used to suppress high transient voltage basically, and it limits the generation effect voltage that may appear between the electric conductor.
In another embodiment, can use ferrite to increase the additional internal inductance of differential mode and common-mode filter.As previously mentioned, the inductance of the capacitive plate on the electric capacity of common ground conductive plate and battery lead plate formation line and line and line and ground Ferrite Material increase simultaneously device.Use ferrite that the transient voltage protection also can be provided, under a certain voltage threshold, ferrite becomes conductor made the transient voltage of limit be diverted to the common ground conductive plate, had limited the voltage by electric conductor effectively.
Therefore, the invention provides a kind of electrode assembly, it comprises: first electrode, it determines following element at least: (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel; Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate; Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel; Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; And described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make any straight line of described second electrode and described third electrode contact with described median plate.
The present invention also provides a kind of electrode assembly, and it comprises: first electrode, and it determines following element at least: (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board is on described median plate, and described median plate is on described lower panel; Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate; Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel; Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; And wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make described median plate make the shielding fully each other of described second electrode and described third electrode.
The present invention also provides a kind of method of making electrode assembly, it comprises: first electrode is set, first electrode is determined following element at least, (1) upper board, (2) median plate, (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel; Second electrode is set, and second electrode is determined second battery lead plate at least, and wherein, described second battery lead plate is below described upper board and on described median plate; Third electrode is set, and third electrode is determined the third electrode plate at least, and wherein, described third electrode plate is below described median plate and on described lower panel; Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; And wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make described median plate make the shielding fully each other of described second electrode and described third electrode.
The present invention also provides a kind of method that transmits, it comprises: a kind of electrode assembly is set, it comprises: first electrode, it determines following element at least, (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel; Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate; Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel; Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; And wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make any straight line that passes described second electrode and described third electrode contact with described median plate; Described second electrode and described third electrode are connected into a circuit; And signal is transmitted to described second electrode or described third electrode at least.
In above-mentioned electrode assembly, described second electrode all has identical substantially size and shape each other with described third electrode.
Wherein said second electrode and described third electrode are lined up opposite orientations relative to one another.
In above-mentioned electrode assembly, described second electrode all has identical substantially size and shape each other with described third electrode; And wherein, described second electrode and described third electrode are lined up opposite orientations relative to one another.
Described electrode assembly also comprises a kind of material that predetermined properties is arranged, can be used as medium.Wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make any straight line that passes described second electrode and described third electrode contact with described median plate.
Described electrode assembly also comprises a kind of such device: each electrode comprises at least one pair of hole respectively in the whole described electrode in the described at least electrode assembly; And each the corresponding pair of holes in the whole described electrode of described electrode assembly comprises at least one insulated hole and a coupling aperture.
The method of described electrode assembly also comprises a kind of such device: each electrode comprises at least one pair of hole respectively in the whole described electrode in the described electrode assembly; And wherein, each the corresponding pair of holes in the whole described electrode of described electrode assembly comprises at least one insulated hole and a coupling aperture.
The method of described electrode assembly also comprises a kind of material that predetermined properties is arranged, can be used as medium; And wherein, described material can be used for the described electrode in the described electrode assembly is spaced from each other at least; Wherein, described second electrode and described third electrode all have substantially the same size and shape each other; And wherein, described second electrode and described third electrode are lined up opposed orientation relative to one another and are arranged; And wherein, described electrode assembly can be used as the em filtering device.
In the described method that transmits, described third electrode and described median plate in the described electrode assembly are all located separately by this way, make any straight line that passes described second electrode and described third electrode contact with described median plate.
In the described method that transmits, the whole described electrode in the described electrode assembly all comprises at least one pair of hole separately; And wherein, the described described pair of holes separately in the whole described electrode in the described electrode assembly comprises an at least one insulated hole and a coupling aperture.
The present invention also provides a kind of electrode assembly, and it comprises: a plurality of bucking electrodes that always intercouple conductively, and wherein, described a plurality of bucking electrodes comprise at least three bucking electrodes; Isolate and a mutual electrode that is shielded of isolating conductively with described a plurality of bucking electrodes conductively; And wherein, each bucking electrode in described a plurality of bucking electrodes is relative to one another by such location and sizing, makes that passing any straight line of the described a pair of electrode that is shielded contacts with described each bucking electrode in described a plurality of bucking electrodes.
Described electrode assembly also comprises and is arranged to such an extent that insert first pair of bucking electrode in described a plurality of bucking electrodes of described at least three bucking electrodes.
Described electrode assembly also comprises and is arranged to such an extent that insert second pair of bucking electrode in described a plurality of bucking electrodes of at least one bucking electrode in described at least three bucking electrodes.
Described electrode assembly also comprises at least one Line To Line capacitor and at least two line direct-to-ground capacitance devices.
Described electrode assembly can be used as capacitor.
Described electrode assembly can be used as the em filtering device of a part that belongs at least one exciting circuit.
The present invention also provides a kind of electrode assembly, and it comprises: first electrode, and it determines following element at least, (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel; Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate; Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel; Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; Wherein, described median plate has a median plate external boundary; And wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make to pass the straight line of described second electrode and described third electrode or pass inside, or contact with described median plate external boundary.
Wherein said second battery lead plate has the second battery lead plate first type surface, and the described second battery lead plate first type surface becomes " C " shape haply.
Wherein said third electrode plate has third electrode plate first type surface, and described third electrode plate first type surface becomes " C " shape haply.
Described " C " shape of described " C " shape of the wherein said second battery lead plate first type surface and described third electrode plate first type surface is arranged relative to one another.
The wherein said second battery lead plate first type surface is determined a cave, also comprises first conduction region in the described cave and second conduction region in the described cave.
Wherein, described first conduction region has the surface of determining first hole, and described second conduction region has the surface of determining second hole.
The present invention also provides a kind of connector construction of the RJ45 of being used for connector, it comprises: first electrode, it determines following element at least, (1) upper board, (2) median plate, (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel; Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate; Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel; Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; Wherein, described median plate has a median plate external boundary; And wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make to pass the straight line of described second electrode and described third electrode or pass inside, or contact with described median plate external boundary.
The present invention also provides a kind of structure that comprises a said structure and an IC chip, and wherein, described connector is electrically connected on the conductor in the described IC chip.
The present invention also provides a kind of structure that comprises a said structure and a PC plate, and wherein, described connector is connected mechanically to described PC plate.
The present invention also provides a kind of structure that comprises a said structure and a casing, and wherein, described connector is connected mechanically to described casing.
In described structure, described connector is electrically connected on the conductor on the described PX plate equally.
Wherein, described connector is electrically connected on the conductor on the described casing equally.
Many other device and structures based on above-mentioned purpose of the present invention and advantage are also disclosed here, with the multifunctionality of differential mode in the explanation scope of the invention and common-mode filter and application widely.
Description of drawings
Shown in Figure 1 is decomposition diagram according to differential mode of the present invention and common-mode filter;
It shown in Figure 1A the decomposition diagram of another embodiment of filter shown in Figure 1;
Fig. 2 A and Fig. 2 B are the theory diagrams of filter shown in Figure 1, and wherein Fig. 2 A is pure principle explanation, and Fig. 2 B is the principle explanation of physical structure.
Fig. 3 is the filter of Fig. 1 and the filter logarithmic chart relatively of the chip capacity that comprises prior art, inserts loss as the signal frequency function;
Fig. 4 is used for the many conductors differential mode of connector and the decomposition diagram of common-mode filter;
Be the schematic diagram of differential mode and common-mode filter and prior art filter shown in Fig. 5 A and Fig. 5 B, wherein Fig. 5 A is many capacity cells used in the prior art, and Fig. 5 B is the electric explanation of the physical implementation scheme of differential mode and common-mode filter among Fig. 4;
Fig. 6 is many conductors of high density differential mode and a plurality of common ground conductive plates of common-mode filter embodiment and the top view of forming of battery lead plate;
Fig. 6 A is another many conductors of high density differential mode and a plurality of common ground conductive plates of common-mode filter and the top view of battery lead plate of composition as shown in Figure 6;
Fig. 7 A and Fig. 7 B are the anterior elevational views of battery lead plate, and wherein Fig. 7 A and Fig. 7 B are respectively the front and back views of battery lead plate;
Shown in Figure 8 is the end view of another embodiment of the differential mode of Fig. 1 and common-mode filter, and it adopts the battery lead plate of Fig. 7 A and Fig. 7 B;
Shown in Figure 9 is the anterior elevational view of the filter of Fig. 8;
Be the embodiment of the surface mount chip of differential mode and common-mode filter shown in Figure 10 A and Figure 10 B, wherein Figure 10 A is a perspective view, and Figure 10 B is a decomposition diagram;
Be the improved embodiment of the filter shown in Figure 10 A and Figure 10 B shown in Figure 11 A and Figure 11 B, wherein Figure 11 A is the perspective view of filter section, and Figure 11 B is its schematic diagram;
Shown in Figure 12 A-Figure 12 D is the multi-filter element pasted on surface; Wherein 12A is the top view of filter, and Figure 12 B to 12D is the top view of interior electrode layer;
Figure 13 is the front view of the section of the filter shown in Figure 12 A;
Figure 14 is the decomposition diagram of the independently thin web in the improved embodiment of differential mode and common-mode filter;
Figure 15 is the anterior elevational view of the section of the thin web of Figure 14 under the working method;
Figure 16 A-Figure 16 D is mainly used in differential mode in the motor and improved another embodiment of common-mode filter; Figure 16 A is the top view of motor filter embodiment; Figure 16 B is its end view; Figure 16 C is the end view of its section; Figure 16 D is the electric explanation of the physical implementation scheme of the filter shown in Figure 16 A;
Shown in Figure 17 A-Figure 17 B be and the motor differential mode of motor electric coupling and physical coupling and the embodiment of common-mode filter; It shown in Figure 17 A top view with the filter of motor coupling; It shown in Figure 17 B its end view;
Figure 18 is a logarithmic chart, and its expression contains the motor of basic filter and contains the differential mode of Figure 17 A, 17B and the motor of common-mode filter is the comparison of the radiation degree of unit with dBuV/m at the function as frequency;
It shown in Figure 19 A-Figure 19 C improved another embodiment of motor differential mode and common-mode filter; It shown in Figure 19 A the top view of a plurality of battery lead plates; It shown in Figure 19 B decomposition diagram with the battery lead plate of a plurality of electric conductor electrical couplings; Figure 19 C is the electric explanation of the physical implementation scheme of motor differential mode and common-mode filter;
Be the high-power embodiment of differential mode and common-mode filter shown in Figure 20 A and Figure 20 B, wherein Figure 20 A is the principle explanation of filter, and Figure 20 B is its part principle/block diagram;
Be high-power differential mode and common-mode filter shown in Figure 21 A and Figure 21 B, Figure 21 A is the part decomposition diagram, and Figure 21 B is its principle explanation;
It shown in Figure 22 A-Figure 22 D improved another embodiment of the present invention; Figure 22 A is used for another the many conductors differential mode of connector and the decomposition diagram of common-mode filter; Figure 22 B is the anterior elevational view of the filter shown in Figure 22 A; Figure 22 C is the electric explanation of the physical implementation scheme of the filter shown in Figure 22 A; Figure 22 D is another electric explanation of the physical implementation scheme of the filter shown in Figure 22 A;
What Figure 23 A and 23B represented is an application of filter of the present invention, and wherein Figure 23 A is the electric explanation of the physical implementation scheme with surge and electromagnetic interference (EMI) equipment shown in Figure 23 B;
What Figure 24 A and 24B represented is the Another Application of filter of the present invention, and wherein Figure 24 A is the electric explanation of the physical implementation scheme of the surge protection device (spd) that electric capacity is arranged shown in Figure 24 B;
What Figure 25 A and 25B represented is the Another Application of filter of the present invention, and wherein Figure 25 A is the physical implementation scheme of the assembly of differential mode and common mode perforated filter and one group of surge protection device (spd), and Figure 25 B is the electric explanation of the assembly shown in Figure 25 A;
Figure 26 A-Figure 26 C is the front view of another embodiment of battery lead plate, and wherein Figure 26 A and Figure 26 C are respectively the front and back views of battery lead plate, and Figure 26 B is the end view of the section of battery lead plate;
Figure 27 is the end view of section that the application of two battery lead plates is as shown in Figure 26 arranged in circuit;
Figure 28 be have in the circuit two as shown in Figure 26 battery lead plate and the end view of the section of the Another Application of a ground plate;
Figure 29 is an exploded view of forming the independent internal layer of multicomponent bar band filter, shown in each internal layer is the bottom view of this layer wherein;
Be the multicomponent bar band filter shown in Figure 29 shown in Figure 30 A-30D, wherein Figure 30 A is a top view, and Figure 30 B is a front view, and Figure 30 C is a lateral side view and Figure 30 D is a bottom view;
Figure 31 is an exploded view of forming the independent internal layer of another multicomponent bar band filter, shown in each internal layer is the bottom view of this layer wherein;
Figure 32 is an exploded view of forming the independent internal layer of another multicomponent bar band filter, shown in each internal layer is the bottom view of this layer wherein;
Be the multicomponent bar band filter shown in Figure 32 shown in Figure 33 A-E, wherein Figure 33 A is a top view, and Figure 33 B is a front view, and Figure 33 C is a lateral side view, and Figure 33 D is a bottom view and Figure 33 E is an end elevation view;
Figure 34 is an exploded view of forming the independent internal layer of another multicomponent bar band filter, shown in each internal layer is the bottom view of this layer wherein;
Be the multicomponent bar band filter shown in Figure 34 shown in Figure 35 A-35E, wherein Figure 35 A is a top view, and Figure 35 B is a front view, and Figure 35 C is a lateral side view, and Figure 35 D is a bottom view and Figure 35 E is an end elevation view;
Figure 36 is an exploded view of forming the independent internal layer of another multicomponent bar band filter, shown in each internal layer is the bottom view of this layer wherein;
Be the multicomponent bar band filter shown in Figure 36 shown in Figure 37 A-37E, wherein Figure 37 A is a top view, and Figure 37 B is a front view, and Figure 37 C is a lateral side view, and Figure 37 D is a bottom view and Figure 37 E is an end elevation view;
Figure 38 is an exploded view of forming the independent internal layer of multicomponent filter, shown in each internal layer is the bottom view of this layer wherein;
Figure 39 is the principle explanation of the multicomponent filter shown in Figure 38;
Be the stereogram of the multicomponent filter shown in Figure 38 shown in Figure 40 A-40C, wherein Figure 40 A is the top view of filter, and Figure 40 B is the anterior elevational view of filter, and Figure 40 C is the end view of filter;
It shown in Figure 41 A-41D the improved embodiment of the multicomponent filter shown in Figure 38, increased ground plate in order to improve performance, wherein Figure 41 A is the exploded view of the independent internal layer of multicomponent filter, Figure 41 B is the principle explanation of multicomponent filter, Figure 41 C is the table of the pad value of multicomponent filter under different test frequencies, and Figure 41 D is the curve of the pad value of multicomponent filter under the different test frequency listed in Figure 41 C;
It shown in Figure 42 A and Figure 42 B the improved application of differential mode and common-mode filter element pasted on surface embodiment, wherein Figure 42 A is the perspective view of improved application, the phase place T network of the passive filter that it has comprised integrated partly to decompose, the principle explanation of the phase place T network of Figure 42 B is integrated passive filter.
Embodiment
Because the use of electronic product constantly increases and produces in the routine work a large amount of electromagnetic interference (EMI)s and radiation, stipulated to be applied to various numerals and simulation application electromagnetic compatibility and required (EMC) as at home, in hospital, automobile, aircraft and the satellite industry.The present invention directly at be the physical structure that in an encapsulation, is integrated with the electronic component of EMI inhibition, broadband I/O line filtering, EMI decoupling noise attentuation and surge protection.
The propagation of electromagnetic energy needs two fields, electric field and magnetic fields.Electric field is coupled into circuit by the electrical potential difference between two or more points with energy.Magnetic field is coupled into circuit by the induction coupling with energy.Magnetic field comes from the electric current that flows through in the path, and the path can be simple wire loop.In such loop, exist two fields and this two fields also to be included in the circuitry lines on the printed circuit board (PCB).These begin to separate on the frequency of 1MHz.
As mentioned above, the electromagnetic energy of propagation is the thing of joining in electric field and magnetic field.Typically, focus on and to be loaded with the EMI filtering of DC in the circuit conductor of high-frequency noise.This has two reasons, and one is to change electric field will produce magnetic field in free space, and second reason is that time dependent magnetic flux will produce electric field.Consequently, there are not single mM disodium hydrogen phosphate or electric field.The field can be electric field at first or be magnetic field at first, but the two can not independently produce.
The main cause of radiated emission problem is because two kinds of conductive currents, differential mode and common mode currents.The field that these electric currents produce causes the EMI radiation.Differential mode (DM) electric current is the wire loop of flowing through, the electric current in circuit board cabling and other leads, its mode be with these current related field sources in the loop that conductor is determined.
The difference of common mode and differential-mode current is their different circuit paths of flowing through.Common mode noise current is the superficial phenomenon relevant with ground, and the exocuticle of flow path cable for example, and this exocuticle is grounding to casing usually.In order to weaken, to reduce and suppressing noise, need provide the low impedance path of a ground connection, all noise current loops of short circuit simultaneously.
Referring now to Fig. 1,, shown in it is the decomposition diagram of the physical structure of common mode and differential mode filter 10.Filter 10 comprises one group of common ground conductive plate 14, and common ground conductive plate 14 has two battery lead plate 16a and 16b at least, and each battery lead plate 16 is clipped between two common ground conductive plates 14.At least one pair of electric conductor 12a also links to each other with the coupling aperture 20 of battery lead plate 16a and 16b with 12b with 16b while electric conductor 12a with battery lead plate 16a selectively with clearance hole 18 or coupling aperture 20 that 12b passes common ground conductive plate group 14.In this preferred embodiment, common ground conductive plate 14 comprises all electrically conductive materials such as metal.Thereby at least one pair of clearance hole 18 passes each common ground conductive plate 14 and guarantee common ground conductive plate 14 and electric conductor 12 electrical isolation when allowing electric conductor 12 to pass wherein.Common ground conductive plate group 14 can be chosen in position predetermined and coupling and be furnished with fixing hole 22, thereby by standard fastener such as screw and bolt each and another in the common ground conductive plate group 14 is coupled reliably.Fixing hole 22 also can be used for common mode and differential mode filter 10 are fastened on the packing or the shell of another surperficial electronic equipment filter 10 of going up as being used to be connected.
Battery lead plate 16a and 16b are similar to common ground conductive plate 14 parts and are that it comprises that electric conducting material and live conductor 12a and 12b pass the hole.What be different from common ground conductive plate 14 is that in battery lead plate 16a and 16b and two electric conductors 12 one is electrically connected selectively.As shown in Figure 1, battery lead plate 14 is drawn forr a short time than common ground conductive plate 14, and this not necessarily still adopts such structure can be avoided battery lead plate 16 to be interfered by the physical coupling device of fixing hole 22.
Electric conductor 12 provides the electric current flow path, and its flow direction represented by the arrow at electric conductor 12 two ends, as shown in Figure 1.Electric conductor 12a represents the transmission path of the signal of telecommunication, and electric conductor 12b represents the path that signal returns.Though only show a pair of electric conductor 12a and 12b, the applicant consider to dispose common mode and differential mode filter 10 be one group of electric conductor to filtering, produce high density many conductors common mode and differential mode filter.
The final element of forming common mode and differential mode filter 10 is the material 28 that one or more electrical characteristics is arranged and center on common ground conductive plate 14 centers, two battery lead plate 16a and 16b and pass part electric conductor 12a and 12b between outmost two common ground conductive plates 14, all plates and conductor are isolated fully mutually like this, except conductor 12a is connected with 12b and coupling aperture 20 generations.The electric property of common mode and differential mode filter 10 is determined by selected material 28.If selection insulating material, filter 10 at first are capacitance characteristic.Material 28 can also be the metal oxide varistor material, and it has capacitance characteristic and surge protection characteristic.Can also use other materials such as ferrite and sintering polycrystal, thereby wherein Ferrite Material have internal inductance and surge protection characteristic and improved and close the common-mode noise that cancellation effect produces by mutual coupling and offset.The sintering polycrystalline material has conduction, insulation and magnetic characteristic.The sintering polycrystal is at U.S. Patent number 5,500, done detailed description in 629, together as a reference here.
Can also use auxiliary material, it is a U.S. Patent No. 5,512, the mixture of disclosed high-dielectric constant ferroelectric material and high magnetic permeability ferromagnetic material in 196, here as a reference.Such ferroelectric-ferromagnetic composite material can form the single element of the compactness that has inductance and capacitance characteristic simultaneously, and it acts on as the LC mode filter.This element compactness, characteristic plastic and filtering are useful to suppressing electromagnetic interference.In certain embodiment, ferroelectric material is that barium titanate and ferromagnetic material are Ferrite Materials as based on the copper zinc ferrite material.The electric capacity of ferroelectric-ferromagnetic mixture and inductance characteristic have damping capacity and promptly do not have signal being higher than under the frequency of 1GHz.The physical dimension of ferroelectric-ferromagnetic mixture will influence the final capacitive and the perception of the filter that uses this mixture.Can change mixture in process of production makes the characteristic of filter can produce suitable decay under specific application and environment.
Still, will be described in more detail the physical relation between common ground conductive plate 14, battery lead plate 16a and 16b, electric conductor 12a and 12b and the material 28 below referring to Fig. 1.It at first is the common ground conductive plate 14 of central authorities.The plate 14 of central authorities makes a pair of electric conductor 12 pass separately clearance hole 18, thereby keeps the electrical isolation between common ground conductive plate 14 and electric conductor 12a and the 12b.In addition, central authorities common ground conductive plate 14 be up and down battery lead plate 16a and 16b, each battery lead plate has a pair of electric conductor 12a and 12b to pass.Different with the common ground conductive plate 14 of central authorities, have only an electric conductor 12a or 12b to isolate with each battery lead plate 16a or 16b by clearance hole 18.Electric conductor is to one of 12a or 12b and battery lead plate 16a or the 16b electrical couplings of passing through coupling aperture 20 respectively.Coupling aperture 20 connects the scolding tin welding, secure fit or the additive method that are electrically connected if can provide solid and reliable and electric conductor and is connected one of 12 by standard.For common mode and differential mode filter 10 are correctly worked, top battery lead plate 16a must with relative electric conductor 12a electrical couplings, and following battery lead plate 16b must with relative electric conductor 12b electrical couplings.Common mode and differential mode filter 10 can comprise one group of outside common ground conductive plate 14.Outside common ground conductive plate 14 like this provides the larger area ground plate to help the decay electromagnetic radiation and to provide bigger surface area that overvoltage and surge are consumed therein.When common ground conductive plate group 14 not with circuit or greatly electrical couplings but depend on provide internally, this point is even more important.As previously described, what insert between common ground conductive plate 14 and two battery lead plate 16a and the 16b and keep is material 28, and it can be one or more groups material that different electrical characteristics are arranged.
Be another embodiment of filter 10 shown in Figure 1A, it has added electric conductor or circuit board connects and filter coupled method.Basically, common ground conductive plate group 14 is electrically connected with outward flange conductive strips or conducting surface 14a.In addition, each battery lead plate 16a and 16b have separately outward flange conductive strips or conducting surface 40a and 40b respectively.For battery lead plate 16a and 16b and its separately conductive strips 40a and 40b between electrical isolation between other parts that guarantee filter 10 when being electrically connected is provided, each battery lead plate 16 is that the arrowband part of battery lead plate 16a is directly over against the direction of battery lead plate 16b for arrowband and its position.The arrowband part of battery lead plate 16a has also prolonged distance makes in additional distance common ground conductive plate group 14 isolate with outward flange conductive strips 40a and 40b by additional materials 28.Being electrically connected by the physical connection between each band and common ground conductive plate 14 or the battery lead plate between each band and the plate realizes.
Shown in Figure 2 is two diagrams of common mode and differential mode filter 10.Fig. 2 a be have between electric conductor 12a and 12b and and the line of electric conductor 12a and 12b coupling to line capacitance 30 and two electric conductor to one of 12 and internally between 34 the line of coupling arrive the schematic diagram of the filter 10 of earth capacitance 32.
Shown in Fig. 2 b be filter 10 the physical implementation scheme accurate schematic diagram and with the relation of the capacity cell shown in Fig. 2 a.Line comprises battery lead plate 16a and 16b to line capacitance 30, wherein battery lead plate 16a and electric conductor to one of 12a coupling and another battery lead plate 16b be coupled with relative electric conductor 12b, thereby formed necessary two parallel-plates of composition electric capacity.The common ground conductive plate 14 of central authorities as internally 34 and as each line to one of two parallel-plates of earth capacitance 32.
Each line is provided by respective electrode plates 16 to earth capacitance 32 another required parallel-plates.With reference to figure 1 and Fig. 2 b, the relation of capacitor board will be seen significantly by careful.By isolate common ground conductive plate 14 and each battery lead plate 16a or 16b of central authorities with material 28 with electric property, form like this one between electric conductor 12a and 12b, have line that common mode shunt capacitance 30 and each electric conductor 12a and 12b and 34 couplings internally obtain to decoupling capacitor 32.
The back will illustrate in greater detail internally, equal the earth or circuit ground but directly it is assumed to be here.For be coupled by central authorities and additional common ground conductive plate 14 form internally 34, make one or more common ground conductive plates 14 with circuit or be coupled greatly by method commonly used as passing fastener hole 22 welding or mounting screw, thus with the shell or the grounding shell coupling of electric equipment.If have with greatly or internally 34 the common mode of circuit ground coupling and differential mode filter 10 work well, then the physical structure of filter advantage is must physics ground connection.
See Fig. 1 again, the bells and whistles of common mode and differential mode filter 10 is respectively by clockwise and counterclockwise flux field 24 and 26 explanations.The direction of each flux field can be determined and expression by Ampere's law and right hand rule.Do like this, thumb is parallel and point to the sense of current of flowing through among electric conductor 12a or the 12b, and the sense of current is represented by the arrow at conductor two ends.In case the sensing of thumb is identical with flowing to of electric current, the direction indication flux field direction of rotation of Wan Qu all the other fingers then.Because electric conductor 12a or 12b position are adjacent and represented seen in a current circuit such as many I/O and the data wire structure, thereby then flow to and the opposite current that flows out common mode and differential mode filter 10 produces the opposite flux field that can cancel out each other and reduced inductance.Because the switching speed that improves constantly in the current instrument and produce unacceptable due to voltage spikes fast pulse rise time, it can only pass through small inductor surge Equipment Control, so in I/O and high speed data lines now, small inductor is favourable.
Can also see that from the labour intensity aspect, use common mode to compare with use discrete component in the prior art with differential mode filter 10, the former provides a kind of simple and effective mode of production.Owing to only need to connect the two ends of electric conductor 12 to obtain differential mode coupling capacitance and two common mode decoupling capacitors, so saved time and space.
Shown in Figure 3 be the variation of inserting loss with the relation of the frequency of several chip capacitors of prior art and with the comparison of employing common mode of the present invention and differential mode filter 10.The line of the 82pF of this curve representation has all been expressed the nonlinear characteristic that changes to the line of line capacitance 50 or 82pF to earth capacitance 56.On the other hand, the filter 10 of configuration has lower linearity insertion loss under up to the 100MHz frequency in the following manner: (1) replaces having the traditional capacitance 50 of identical value to line capacitance 54 with the line of 82pF; (2) replace having the traditional capacitance 56 of identical value to earth capacitance 58 with the line of 82pF; (3) line with 41pF replaces two traditional capacitance 50 and 56 to earth capacitance 52.
Another embodiment of the present invention is the common mode shown in Fig. 4 and many conductors of differential mode filter 110.The similarity of filter 110 and the filter 10 of Fig. 1 and 1A is that it comprises that one group of common ground conductive plate 112 and one group of conductive electrode 118a to 118h form the differential mode coupling capacitance and the common mode decoupling capacitor acts on one group of electric conductor to last, do not illustrate among Fig. 4 this electric conductor to but it is similar to electric conductor 12a and the 12b shown in Fig. 1 and the 1A.Uniconductor shown in Fig. 1 as previously described is to filter 10, and common ground conductive plate 112, conductive electrode 118 and a plurality of electric conductor make between them as insulating material, Ferrite Material, MOV section bar material and sintering polycrystalline material by previously selected material 122 with predetermined electrical performance isolates mutually.In the common ground conductive plate group 112 each all has one group of clearance hole 114, and electric conductor passes clearance hole 114 and makes itself and separately common ground conductive plate 112 electrical isolation.In order to hold one group of electric conductor, common mode and differential mode filter 110 must use the improved battery lead plate among Fig. 1 and the 1A.
For to each to electric conductor to a plurality of independently conductive electrodes are provided, backing material 116 comprises one of material 122 with required electric property.Supporting bracket 116a comprises a group of conductive electrode 118b, 118c, 118e and the 118h that is printed on the plate 116a one side, and each electrode has a coupling aperture 120.Supporting bracket 116b also comprises a group of conductive electrode 118a, 118d, 118f and the 118g that is printed on the plate 116b one side.Supporting bracket 116a and 116b are by 112 separations of common ground conductive plate group and by its encirclement.The electric conductor of each input is to having corresponding electrode right in filter 110.Electric conductor passes common ground conductive plate group 112 and corresponding conductive electrode, but does not illustrate among the figure.By selecting coupling aperture 120 to determine whether to be connected with clearance hole 114.The battery lead plate 16a of the common function that realizes of common ground conductive plate group 112 and conductive electrode 118a to 118h and Fig. 1 and 1A and the function of 16b are basic identical.
Shown in Figure 5 is with the many capacity cells of prior art and the theory diagram of common mode of the present invention and many conductors of differential mode filter 110.Fig. 5 a is the schematic diagram with the capacitor array 130 of prior art.Basically, one group of electric capacity 132 of formation intercouples to array 130 provides public ground 136, and open end 134 makes electric conductor link to each other with each electric capacity 132 simultaneously.When the open end 134 of each electric capacity 132 was electrically connected with each electric conductor, these capacitor arrays with prior art only allowed each electric conductor common mode decoupling.
Be four common modes and differential mode filter pin to be arranged shown in Fig. 5 b to the common mode of structure and the principle explanation of many conductors of differential mode filter 110.Pass the horizontal line of each electrode pair and represent common ground conductive plate 112, it has surrounding electric poles is isolated gate 112a to last line.Isolated gate 112a and common ground conductive plate 112 electrical couplings, produce one internally network each battery lead plate 118a to 118h is separated mutually.Be positioned on the central common ground conductive plate 112 and under fid flitch 116a and 116b go up corresponding conductive electrode 118a to 118h and form the common mode decoupling capacitor of line to ground.Each plate, common ground conductive plate 112 and fid flitch 116a and 116b are separated mutually by insulating material 122.When filter 110 by coupling aperture 120 as the hole on the battery lead plate 118a to 118c and electric conductor when being connected, line of filter 110 generations is to line differential mode filter capacitor.
Referring to Fig. 4, shown many conductors filter 110 not only has central common ground conductive plate 112 to also have outside common ground conductive plate 112 once more.Described in Fig. 1 and 1A, outside common ground conductive plate 112 provides very large-arealy for filter 110, this helps the electromagnetic radiation that decays, and provides bigger surface for disperseing and/or absorbing overvoltage, surge and noise, is of great use as the Faraday shield box.When common ground conductive plate group 112 and circuit or be electrically connected greatly but produce one internally the time, this point is particularly definite.
Shown in Figure 22 is further improvement of the present invention, i.e. common mode and many conductors of differential mode filter 680.Filter 680 is preferred in computer and the communication equipment and its structure is applicable to the RJ45 connector.In order to improve performance of filter, filter 680 comprises and places in the casing and the circuit board low-frequency noise intercepts electric capacity and one group of common mode and differential mode filter.As shown in Figure 22 a, the physical structure of filter 680 is similar to the filter 110 shown in Fig. 4 substantially, and comprise one group of common ground conductive plate 112, first and second battery lead plates 676 and 678 with a plurality of conductive electrodes form a plurality of common modes and the differential mode filter that comprise casing and circuit board obstruct electric capacity.Described in the embodiment of front, common ground conductive plate 112, conductive electrode 686,688,690 and 692, intercept electrode 682 and 684, and the electric conductor (not shown) that passes each plate is isolated mutually by material 122.For realizing predetermined electrical performance in the filter 680, as all electric properties in other embodiments of the present invention, material 122 can comprise insulating material, ferrite, MOV section bar material or sintering polycrystal.Each common ground conductive plate 112 comprises one group of clearance hole 114, and electric conductor passes clearance hole 114 and makes itself and common ground conductive plate 112 electrical isolation.Intercept electric capacity in order to obtain additional housing and circuit board noise, filter 680 has changed the battery lead plate of Fig. 1.
As described in Figure 4, in order to make a plurality of electric conductors to a plurality of independently elements are arranged, material 122 is also as backing material 116, and it is used to assemble first and second battery lead plates 676 and 678.First battery lead plate 676 is made up of with obstruct electrode 688 first and second conductive electrodes 682 and 686, and they all are imprinted on a side of backing material 116.Second battery lead plate 678 is made up of with obstruct electrode 692 first and second conductive electrodes 684 and 690, and they also are imprinted on a side of backing material 116.First and second battery lead plates 676 and 678 are separated by common ground conductive plate 112 and surround.Filter 680 and the embodiment of front promptly allow to be built in difference that common mode and differential mode filter and circuit board noise in the shell intercept the filter that electric capacity mixes and are first and second conductive electrodes on first and second battery lead plates 676 and 678 and the structure of obstruct electrode.First and second conductive electrodes 686 and 688 of first battery lead plate 676 include a coupling aperture 120 on electrode.Intercept electrode 682 parts and surround first and second conductive electrodes 686 and 688 and comprise one group of clearance hole 114 and coupling aperture 120.Second battery lead plate 678 and first battery lead plate, 678 equities, first and second conductive electrodes 686 and 688 of first and second conductive electrodes 690 and 692 corresponding first battery lead plates 678, the obstruct electrode 682 of obstruct electrode 684 corresponding first battery lead plates 678.As among Figure 22 a clearly shown in, when being coupled between each common ground conductive plate 112, first and second battery lead plates 676 and 678 direction are opposite.When being used for connector, first and second battery lead plates 676 and this specific arrangement mode of 678 allow filter 680 that the pin export structure of traditional RJ45 is arranged.It should be noted that the application comprises that electricity leads and intercept the pin output of other structure of electrode or the wiring form of expectation, and does not need reverse first and second battery lead plates 676 and 678 positions.
As in other embodiment, many electric conductors will pass common ground conductive plate 112 and first and second battery lead plates 676 and 678.Though there is not electric conductor, be that the particular embodiment of filter 680 promptly has eight conductors for the RJ45 connector standards shown in Figure 22 b.The interaction of each conductive electrode in the filter 680 will describe with reference to figure 22a to Figure 22 d, and wherein Figure 22 b comprises the physical implementation scheme of filter 680 and the further relation of electric diagram.Figure 22 d is another electric diagram of filter 680, and it also is the electric diagram of required reference.The signal ground of filter 680 (SG) is provided by conduct common ground conductive plate 112 internally.First and second battery lead plates 676 and each conductive electrode of 678 carry out physical separation by the conductive plate of common ground conductive plate 112; this just provides one as ground and the substantial ground pole plate of the electromagnetic radiation input that helps to decay for filter 680; provide bigger surface area disperseing and/or to absorb overvoltage, surge and noise, and as faraday cell effectively protecting filter avoid external noise and by filter 680 radiation proofs.
Referring to each electric conductor 1 to 8 shown in Figure 22 b, 22c and the 22d, electric conductor 3 links to each other with 688 with first and second conductive electrodes 686 respectively by coupling aperture 120 with 5.Electric conductor 4 links to each other with 692 with conductive electrode 690 respectively by coupling aperture 120 with 6.Electric conductor 2 links to each other with obstruct electrode 682 by coupling aperture 120 with 8 conductor 1 equally with intercepting that electrode 684 links to each other by coupling aperture 120 with 7.Referring to Figure 22 d, electric conductor 3 and 6 carries out differential filtering by the interaction of first and second conductive electrodes 686 and 692, and first and second conductive electrodes 686 and 692 form line to line capacitance as relative plate between electric conductor 3 and 6.Electric conductor 3 and 6 lines that form by the interaction and the common ground conductive plate 112 of first and second conductive electrodes 686 and 692 receive common mode filtering to earth capacitance, form line to earth capacitance by a plurality of common ground conductive plates 112 at each electric conductor with internally.
Also there is same relation with the electric conductor 4 and 5 that first and second conductive electrodes 690 link to each other with 688 respectively.It is each electric conductor formation common mode filtering electric capacity separately to line capacitance and each conductive electrode with 112 interactions of common ground conductive plate that first and second conductive electrodes 690 and 688 form lines.Except a plurality of common modes and differential mode filter by the generation that interacts between each conductive electrode and the common ground conductive plate, the interaction of common ground conductive plate 112 and obstruct electrode 682 and 684 also produces casing and the circuit board noise intercepts electric capacity.For example, casing ground links to each other with 7 with electric conductor 1, thus electric conductor 1 and 7 all by coupling aperture 120 with intercept electrode 682 and link to each other and form a pole plate of noise obstruct electric capacity.Another pole plate that noise intercepts electric capacity is formed by common ground conductive plate 112, and it interacts with obstruct electrode 682.Though interchangeable, electric conductor 2 and 8 also provides by common ground conductive plate 112 and has intercepted the circuit board noise obstruct electric capacity that electrode 682 interacts and forms.Thereby what casing and circuit board noise intercepted that electric capacity allows all that common ground conductive plate 112 forms is internally stoped signal to insert low frequency electrical noise in the conductor by capacitor decoupling.The performance of internally having improved common mode and differential mode filter that forms by electric substantially cleaning common ground conductive plate 112 so just.
Fig. 6 has illustrated improved embodiment of the present invention, it for a large amount of electric conductor of current high density information and data/address bus to providing the I/O data wire paired filtering.Common mode and differential mode high density filter 150 comprise one group of common ground conductive plate 112, and it comprises a plurality of clearance holes 114 and the conductive electrode 116a and the 116b of electrode pair 118, clearance hole 114 and coupling aperture 120 are arranged.The visible insulating material of stack arrangement from Fig. 6 is around each pole plate, described in the embodiment of front.
Fig. 6 A represents the other method of common mode and differential mode high density filter 150, and it utilizes the three-dimensional coupling of electrode to improve ground and the line electric capacity to line.In addition, filter 150 comprises one group of common ground conductive plate 112, and each plate has a plurality of clearance holes 114, and the conductive electrode plate 119a to 119c of electrode pair 117a to 117c is separately arranged.Each conductive electrode plate 119a to 119c is included in one group of clearance hole 114 and the coupling aperture 120 on the preposition, and its allows electric conductor to passing, and the electric conductor that is coupled selectively simultaneously produces the filter construction of expectation.Stack arrangement among Fig. 6 A also be similar to Fig. 1,1A, 4 and 6 and insulating material 122 that predetermined different-thickness arranged around each pole plate.
Fig. 7,8 and 9 expressions be single hole battery lead plate 70 and the application of this plate in another embodiment of common mode of the present invention and differential mode filter.Shown in Figure 7 is the two sides of battery lead plate 70, and wherein Fig. 7 a is front and Fig. 7 b is the back.Referring to Fig. 7 a, battery lead plate 70 includes the material 72 of predetermined electrical performance, insulating material as previously described or other materials, and material 72 is compression molded into the shape of expectation here, is disk in this example.Hole 78 is arranged in battery lead plate 70 and allows electric conductor to pass.Thereby the part of the front of battery lead plate 70 has covered conducting surface 74 and has produced isolation strip 82 at the external diameter of battery lead plate 70.What center on hole 78 is that welding is with 80, and once heating, this hole will be gone up with the electric conductor welding of passing hole 78 and conductor and conducting surface 74 are electrically connected.Referring to Fig. 7 b, the back of battery lead plate 70 is similar to the front of battery lead plate 70, thereby conducting surface 74 produces isolation strip 82 with material 72 bonding external diameters at battery lead plate.Different with the front is, isolation strip 76 around hole 78 to be electrically connected between the electric conductor of the back that stops battery lead plate 70 and the conducting surface 74.
What Fig. 8 and 9 represented is how to produce common mode and differential mode filters 90 with a plurality of battery lead plates 70.The similar of filter 90 is in the embodiment of front, and wherein common ground conductive plate 98 is clipped between two battery lead plates 70 forms one group of necessary parallel-plate structure of capacity cell to produce at least.As shown in Figure 9, second battery lead plate 70 is enough big with public another side coupling and spacing by ground conductive plate 98 simultaneously in the one side coupling of battery lead plate 70 and common ground conductive plate 98, allows electric conductor 92a and 92b to pass a battery lead plate 70 and the reverse side that do not influence another battery lead plate 70 and common ground conductive plate 98 is coupled.Though do not represent clearly among the figure, common ground conductive plate 98 comprises the hole that is positioned on the precalculated position obviously, and work and allow electric conductor 92a and 92b to pass in the hole one of it and battery lead plate 70, as shown in Figure 8.
Common ground conductive plate 98 as and provide internally 96, it can be connected with the earth or signal ground if desired.Fixing hole 22 allows filter 90 and construction machine coupling.Represented a kind of method of battery lead plate 70 among Fig. 8 with common ground conductive plate 98 physical coupling.Being sandwiched between the back of common ground conductive plate 98 and battery lead plate 70 is weld seam 84, in case heating, weld seam is connected with the conducting surface 74 of battery lead plate 70 back and the respective surfaces of common ground conductive plate 98.When battery lead plate 70 was connected with common ground conductive plate 98, the respective face of common ground conductive plate 98 was always faced in the back of battery lead plate 70.Same mechanical couplings method is used for battery lead plate.Also expressed welding in each battery lead plate 70 and be with 80, it is only with its corresponding battery lead plate coupling of one of two electric conductor 92a and 92b.The structure of common ground conductive plate 98 and battery lead plate 70 provides line to arrive the decoupling on ground to the filtering of line differential mode and for each electric conductor provides line between electric conductor 92a and 92b.Differential mode filtering realizes by the conducting surface on the front of two battery lead plates 70 74, and two battery lead plates 70 are as electric conductor 92a and 92b or the line parallel plate electrode to the coupling capacitance between the line.Line to the decoupling on ground by realizing as each battery lead plate 70 of a capacitor plate with as the conducting surface 74 of the common ground conductive plate 98 of another parallel capacitance pole plate.The parallel capacitance pole plate that is provided by common ground conductive plate 98 is as internally 96, among electric conductor 92a and the 92b each provides decoupling over the ground to be connected.
The advantage of Fig. 8 and common mode shown in 9 and differential mode filter 90 is that relative simple and its voltage and current of its structure handles electric capacity and limited by its physical structure, and its physical structure can increase at an easy rate or reduces according to desired characteristics.
Shown in Figure 26,27 and 28 diplopore battery lead plate 600 and the application of this plate in another embodiment of common mode of the present invention and differential mode filter.Referring to Figure 26 a, battery lead plate 600 includes the material 616 of predetermined electrical performance, and material 616 is compression molded into the shape of expectation, is depicted as disk here.Be first of diplopore battery lead plate 600 shown in Figure 26 a, it comprises first and second holes 602 and 604, and each Kong Jun has an isolation strip 606 that the hole and first conducting surface 608 are separated.Shown in Figure 26 c second of diplopore battery lead plate 600, it includes first hole 602 and second hole 604 that directly is connected with conducting surface 610 of an isolation strip 606, it has occupied second the overwhelming majority of diplopore battery lead plate 600, except the isolation strip 612 along plate 600 outer rings.It shown in Figure 26 b first conducting surface 608 and electrical couplings around the side conducting surface 614 of diplopore battery lead plate 600.The isolation strip 612 of second outer ring that is positioned at diplopore battery lead plate 600 is with first and second conducting surfaces 608 and 610 physical separation and electrical isolation each other.
When two electric conductors passed first and second holes 602 and 604, the electric conductor and second conducting surface 610 that only pass hole 604 were electrically connected.The function of diplopore battery lead plate 600 is that with the difference of the single hole battery lead plate 70 shown in Fig. 7 battery lead plate 600 needn't depart from placement relative electric conductor shown in Figure 9 and described is passed through.
What Figure 27 represented is how to produce common mode and differential mode filter 626 with a plurality of diplopore battery lead plates 600, it is by being electrically connected realization with two diplopore battery lead plates 600, be first of each battery lead plate 600, shown in Figure 26 a, relative with first of electrode of opposite plate 600, first conducting surface 608 of each battery lead plate 600 is electrically connected by the method for prior art simultaneously, as weld pads 622 between two first conducting surfaces 608.Two electric conductors 618 and 620 pass the hole of arranging on each diplopore battery lead plate 600, and electric conductor 618 is electrically connected with the second conducting surface 610b of battery lead plate 600b simultaneously, and electric conductor 620 is electrically connected with the second conducting surface 610a of battery lead plate 600a.Follow as hereinbefore common mode of the present invention and the principle of differential mode structure, the first conducting surface 608a and 608b form and as the common ground conductive plate, for common mode and differential mode filter 626 provide internally.The second conducting surface 610a of each battery lead plate 600a and 600b and 610b have formed two pole plates of the differential capacitance that is coupled between electric conductor 618 and 620 as conductive electrode independently.The second conducting surface 610a and 610b have also formed the common mode decoupling capacitor with the conduct first conducting surface 608a and 608b internally.Compare with single hole battery lead plate 70 shown in Figure 7, an advantage of diplopore battery lead plate 600 is to separate the common ground conductive plate.The first conducting surface 608a and 608b conduct have also formed the common ground conductive plate.If desired, the separated common ground conductive plate 624 that is arranged with clearance hole can be between diplopore battery lead plate 600a and 600b, as shown in Figure 28, generates bigger internally to disperse electrical noise and heat radiation with bigger conductive area.
A trend of modern electronic equipment is instrument and the electronic component miniaturization constantly of forming instrument.Key element electric capacity in common mode and the differential mode filter is no exception, can be present in silicon chip and the embedding integrated circuit to such an extent as to its size constantly reduces them, and we can only see them with microscope.Popular a kind of miniaturized capacitance is a sheet capacitor, and it is more much smaller than standard feedthrough capacitor or gap capacitance.Sheet capacitor physically with electrically is connected with cabling with electric conductor on the circuit board by surface mounting technology.The multifunctionality of common mode of the present invention and differential mode filter structure is showed in surface mounting technology as shown in Figure 10.Be surface mount common mode and differential mode filter 400 shown in Figure 10 a, Figure 10 b is its internal structure.Referring to Figure 10 b, common ground conductive plate 412 is sandwiched between the first difference plate 410 and the second difference plate 414.Common ground conductive plate 412 and first, second difference plate 410,414 include the material 430 that the electric property of expectation is arranged according to selected material.For all embodiments of the present invention, the applicant expects to adopt various materials as being not limited to insulating material, MOV-section bar material, Ferrite Material, film such as mylar and material such as sintering polycrystal newly developed.
The conductive electrode 416 that the first difference plate 410 comprises and material 430 upper surfaces are coupled, they are coupled in following mode, and promptly isolation strip 418 centers on the outer ring of the first difference plate 410 along three limits in four limits of the first difference plate 410.Isolation strip 418 is the parts that do not covered by conductive electrode 416 along material 430 edges.The second difference plate 414 is basic identical with the first difference plate 410, different except its physical orientation and the first difference plate 410.The conductive electrode 426 that the second difference plate 410 comprises and material 430 upper surfaces are coupled, they are coupled in following mode, and promptly isolation strip 428 centers on the outer ring of the first difference plate 410 along three limits in four limits of the second difference plate 414.It should be noted that the first and second difference plates 410 and 414 physical orientation each other is to be separated by 180 with isolation strip 418 and 428 nontangential one side on each plate.This orientation allows each electric conductor and a plate 410 or 414 rather than two plate couplings.
The similarity of common board 412 and the first and second difference plates 410 and 414 is that it comprises material 430, and public conductive electrode 424 is coupled with the upper surface of material 430.As by Figure 10 b finding, common board 412 has two isolation strip 420 and 422, and they are positioned at opposite two ends.Common board 412 is arranged between the first and second difference plates 410 and 414, thereby makes isolation strip 420 and 422 and do not have first and second difference plates 410 of isolation strip and a justify align of 414.Without any conducting surface, therefore when a stack of plates was on another plate, conductive electrode 426 was isolated by the back and the public conductive electrode 424 of common board 412 under each plate for all three plates, common board 412 and the first and second difference plates 410 and 414.The similarly back and 424 isolation of public conductive electrode of the mode first difference plate 410 that is conductive electrode 426 by comprising material 430.
Referring to Figure 10 a, will be further described below the structure of surface mount common mode and differential mode filter 400.When common board 412 and the first and second difference plates 410 and 414 are clipped together according to the structure shown in Figure 10 b, must comprise device with electric conductor and the coupling of different electrodes.Electric conductor is by the first difference conductive strips 404 and the second difference conductive strips 406 and surface mount common mode and differential mode filter 400 couplings, and the first difference conductive strips 404 and the second difference conductive strips 406 are isolated by isolation strip between conductive strips 402,404 and 406 408 and public conductive strips 402.Public conductive strips 402 and isolation strip 408 isolate filter along filter 400 all around around 360.The first and second difference conductive strips 404 and 406 not only extend 360 ° but also extend to the top cover two ends respectively along filter 400.
By with the aid of pictures, can see the coupling between band and the plate from front and back between Figure 10 a and the 10b.The first difference conductive strips 404 that comprise end points 434 keep electrical couplings with conductive electrode 416, and conductive electrode 416 makes isolation strip 418 extend to an end of the first difference plate 410.The second difference conductive strips 406 are respectively by isolation strip 422 and 428 and common board 412 and the first difference plate, 410 electrical isolation.Similarly mode comprises conductive electrode 426 electrical couplings of the second difference conductive strips 406 and the second difference plate 414 of end points 432 as previously described.Because isolation strip 420 and the 418 and first difference plate, 410, the second difference conductive strips 406 and the first difference plate 410 and common board 412 electrical isolation of common board 412.
Public conductive strips 402 are to realize that with public conductive electrode 424 physical coupling four limits of common board 412 have lacked the isolation strip by the limit 436 of public conductive strips 402 with the electrical couplings of common board 412.In order to keep public conductive electrode 424 and the first and second difference conductive strips 404 and 406 electrical isolation, the isolation strip 420 and 418 of common board 412 stoped the first and second difference conductive strips 404 and 406 and public conductive electrode 424 between any physical coupling.
As other embodiments of common mode of the present invention and differential mode filter, when electric conductor and the first and second difference conductive strips 404 and 406 couplings, the first and second difference plates 410 and 414 conductive electrode 416 and 426 as line to the line differential mode capacitor.At each conductive electrode 416 and 426 respectively and produce between internally the public conductive electrode 424 and form line to the ground decoupling capacitor.
Shown in Figure 11 is surface mount common mode and differential mode filter 438, and it is the improved embodiment of the filter shown in Figure 10.Its profile perspective more clearly shows the first and second difference conductive strips 446 and 450 and how to be electrically connected with battery lead plate 448 and 452.Between public conductive strips 442 shown in the figure and the common ground conductive plate 440 be electrically connected with the difference shown in Figure 10 be public conductive strips 442 do not have continuous 360 ° around surface mount filter 438 itself.
Another significant difference is that filter 438 comprises a plurality of electrodes and common ground conductive plate 448,452 and 440 between the filter 438 of Figure 11 and the filter 400 of Figure 10.The advantage of utilizing a plurality of common ground conductive plates and battery lead plate is can obtain bigger capacitance when the size of surface mount filter 438 reduces.As resistance, electric capacity can be connected and is in parallel.Total resistance value of a plurality of resistance series connection is each resistance value sum, and electric capacity has opposite relation.For the effect that realizes adding, electric capacity must be mutually in parallel, promptly filter 438 have a plurality of pole plates and the first and second difference conductive strips 446 and 450 and public conductive strips 442 be coupled.As the embodiment of front, the material 454 with specific electrical characteristic is about to its corresponding electrical characteristic and gives differential mode and common-mode filter around electrode plate groups 448 and 452 and common ground conductive plate 440 and it is isolated mutually.It shown in Figure 11 b the relation between surface mount differential mode and common-mode filter 438 schematic diagrams and common ground conductive plate group 440 and electrode plate groups 448 and 452.
In the battery lead plate 448 and 452 each and its conductive strips 450 and 446 electrical couplings separately.Electric conductor then is coupled with the first and second difference conductive strips 446 and 450, and electrode plate groups 448 and 452 in parallel simultaneously provides one to be coupled between the electric conductor as the total capacitance value of line to the coupling of line differential mode.Common ground conductive plate group 440 provides line to arrive the ground decoupling capacitor between each electric conductor and public conductive strips 442 with battery lead plate 448 and 452.Common ground conductive plate group 440 is as internally, and it can also be by public conductive strips 442 with signal ground or be connected greatly.In addition, physical structure of the present invention allows multiple variation, and by changing capacitance and the performance of filter that plate quantity and/or size can obtain wide variation.
Shown in Figure 12 is another multicomponent surface mount differential mode and common-mode filter, and it is integrated two filters independently in an electronic component.Be interpreted as in an electronic component can integrated any amount independently filter, the present invention is not limited to two filters.Be a kind of inner connecting structure shown in Figure 12 a, what Figure 12 b-d and Figure 13 represented is internal electrode and public ground conductive layer.The first and second difference conductive strips 154 and 156 are coupled with battery lead plate 153 and 155 respectively and conductive strips 154 ' and 156 ' similarly are coupled with battery lead plate 153 ' and 155 '.Multicomponent surface mount filter 160 also comprises the material that predetermined electrical characteristic is arranged 166 as previously described that is distributed between electrode group and the public ground conductive layer.Public ground conductive strips 164 are electrically connected with common ground conductive plate 163.It should be noted that the applicant not only pays close attention to a plurality of elements in an Electronic Packaging, and the first and second difference conductive strips 154 and 156 and the shape of public ground conductive strips 164 and structure and/or length and width can change any printed circuit board (PCB) plate face with adaptive expectation.Conductive strips and public band only need and isolated electrode plate and common ground conductive plate 163 electrical couplings to keep the electrical isolation between them.If desired, the notion shown in Figure 12 can expand to simply and merge 10,20 or 100 differential modes and common-mode filter.Multicomponent surface mount differential mode and common-mode filter 160 are particularly useful for providing filtering for the lot of data bus is typically 32 or 64 position datawires.These data/address buss are handled digital information under very high frequency, launch a large amount of electromagnetic energies and influenced by overcurrent and voltage surge, cause circuit to damage and data distortion.
Be the application of the surface mount filter shown in aforesaid Figure 11 shown in Figure 23 and 24, comprise the electric expression of application.Shown in Figure 23ly be and the differential mode of differential mode and common mode capacitance filter 400b parallel coupled and the composition of common mode MOV filter 400a, it provides differential mode and common mode surge protection by increasing electric capacity, and this can not be realized alone by MOV equipment usually.Be that filter 400a and 400b physics pile up shown in Figure 23 b, the so first difference conductive strips 446a and the mutual electrical couplings of 446b, the second difference conductive strips 450a and the mutual electrical couplings of 450b and public ground conductive strips 442a and the mutual electrical couplings of 442b are expressed as 443.Except the electrical characteristic difference of the material that is used to separate each conductive electrode, the physical structure of filter 400a and 400b is identical, and the isolation strip 444a of two filters and 444b also are aligned.Though do not illustrate among the figure, the applicant knows that not quite identical element of the present invention also can pile up or make up according to the residing special applications of element.But the advantage of the physical structure of surface mount filter of the present invention or element is them piles up conserve space in circuit, this meets the development trend of modern electronic technology miniaturization.
Shown in Figure 23 a is its result, and wherein the electric conductor (not shown) is coupled in and produces differential mode and common mode filtering and surge inhibition between the first difference conductive strips 446a and 446b and the second difference conductive strips 450a and the 450b.Owing to increased electric capacity and overvoltage has been arranged and surge protection, this assembly has improved total filter response.Shown in Figure 24 is Another Application, and wherein surface mount electric capacity 720 is coupled between the first and second difference conductive strips 446 and 450 of differential mode and common mode MOV surge/filter 400a, and consequently electric capacity 720 provides line to line capacitance.This circuit structure has also increased the effective capacitance of differential mode and common mode MOV surge/filter 400a.As shown in Figure 23, the electric conductor (not shown) is coupled between the assembly of the assembly of the first difference conductive strips 446 and first conductive strips 724 and the second difference conductive strips 450 and second conductive strips 722.
Figure 38 to 40 is that the element that piles up expression in Figure 23 and 24 is further represented, it has piled up two or more differential modes and common-mode filter in a component package.The structure of the multicomponent filter 806 shown in Figure 38 is identical with many other embodiments of the present invention, except quantity of polar plate be the number of elements of in a component package, piling up double, three times or many times.Each pole plate shown in Figure 38 comprises that the line of demarcation of first and second filters 814 of multicomponent filter 806 and 816 and two filters is by dotted line 818 expressions.First and second filters 814 have similar structure with 816.Each filter comprises one group of common ground conductive plate 808 and is sandwiched in first and second different battery lead plates between each common ground conductive plate 808,810 and 812 respective filter 814 and 811 and 813 respective filter 816.Utilize known various prior aries with each common ground conductive plate 808 and the printing of first and second battery lead plates 810 to 813 or be etched on the backing material of predetermined electrical performance.When piling up each layer, there is the auxiliary material (not shown) of predetermined electrical performance to place between each common ground conductive plate and the battery lead plate and makes their mutual electrical isolation.
As shown in Figure 39, to pile up the result of first and second filters 814 and 816 be two or more differential modes and common-mode filter parallel coupled in inside.As shown in Figure 39 and 40, multicomponent filter 806 comprises first and second filters 814 and 816, wherein first battery lead plate 810 of each filter and 811 coupled in common are in the first difference conductive strips 822, second battery lead plate 812 of each filter and 813 coupled in common are in the second difference conductive strips 822, and each all common ground conductive plate coupled in common is in public ground conductive strips 820.Shown in Figure 40 is the stereogram of the standard surface mount components assembly of interior dress multicomponent filter 806.Assembly is covered with insulation crust 826, except exposing each conductive strips that is used for filter 806 and external circuit electrical couplings.
Only pile up when two filters are arranged when inside in the component package, the applicant pays close attention to the add ons of piling up inside and is not limited to the embodiment shown in Figure 38 to 40.The special applications that technology is piled up in inside is with a high power capacity filter and a low capacity filter combination, form a wide band filter, thereby the performance of having improved filter has wideer frequency range.Referring to Figure 38, the first and second difference plates 811 and 813 of second filter 816 comprise the conducting surface 830 littler than the conducting surface in first filter 814 828.The size of the conducting surface by changing the first and second difference plates can change the actual capacity value of filter.Multicomponent filter 806 is assemblys of high power capacity filter 814 and low capacity filter 816, and the multicomponent filter 806 that this assembly produces has the advantage of high power capacity filter, has improved high frequency characteristics.
Figure 41 A to 41D is the differential mode that piles up in a component package shown in Figure 38 to 40 and another embodiment of common-mode filter.The differential mode and the common-mode filter that pile up among the structure of the multicomponent filter 900 shown in Figure 41 A and Figure 38 are identical, and it has increased auxiliary common ground conductive plate 912.Be to form first and second filters 914 of multicomponent filter 900 and 916 each metal layer or pole plate shown in Figure 41 A, the line of demarcation between two filters is by dotted line 922 expressions.First and second filters 914 and 916 structural similarity.Each filter comprises one group of common ground conductive plate 902 and is sandwiched in first and second different battery lead plates between each common ground conductive plate 902,904 and 906 respective filter 914 and 905 and 907 respective filter 916.Utilize known systems, with each common ground conductive plate 902 and the printing of first and second battery lead plates 904 to 907 or be etched on the backing material of predetermined electrical performance.When piling up each layer, there are the auxiliary material of predetermined electrical performance to place between each common ground conductive plate and the battery lead plate and make its electrical isolation each other.
Embodiment reaches as shown in Figure 41 B as the aforementioned, and the result that first and second filters 914 and 916 are piled up in inside is two or more differential modes and common-mode filter parallel coupled.The aforesaid embodiment of multicomponent filter 900 as shown in Figure 40, filter 900 comprises first and second filters 914 and 916, wherein first battery lead plate 904 of each filter and 905 coupled in common are in the first difference conductive strips 918, second battery lead plate 906 of each filter and 907 coupled in common are in the second difference conductive strips 920, and each all common ground conductive plate coupled in common is in public ground conductive strips 924.The schematic diagram that shown in Figure 41 B is each conductive strips is represented.Though do not illustrate among the figure, the surface mount assembly of multicomponent filter 900 is identical with the filter 806 shown in Figure 40, wherein the first difference conductive strips 822 are equal to conductive strips 918, the second difference conductive strips 824 and are equal to conductive strips 920, and public ground conductive strips 820 are equal to conductive strips 924.
Figure 41 C and 41D tabulation also illustrates the attenuation characteristic of the multicomponent filter 900 shown in single differential mode of the present invention and common-mode filter and Figure 41 A and the 41B.First row of showing among Figure 41 C are attenuation characteristics of two kinds of filters measuring in test frequency 1MHz to the 2000MHz scope.The place an order attenuation measurements of differential mode and common-mode filter of the structure that among Figure 41 C the second and the 3rd tabulation is shown in 0.1uF.Among Figure 41 A, single 0.1uF differential mode and common-mode filter are by 916 expressions.The attenuation characteristic of multicomponent filter is shown among Figure 41 C the 4th and the 5th tabulation, is piled up with parallel coupled by 0.1uF filter 916 and 4.8nF filter 914 to form multicomponent filter 900.Shown in second to the 5th row of Figure 41 C is the pad value of representing with decibel.Secondary series be the line that measures to ground or X to the attenuation characteristic on ground, as shown in Figure 41 B.The 3rd row are attenuation characteristics that the X that measures when the X of Figure 41 B and the short circuit of Y point arrives ground.The 4th is identical with the second and the 3rd row with the method for measurement of the 5th row, and promptly the 4th row are lines to the decay on ground and decay that X that the 5th row measure when being X and the short circuit of Y point or line arrive ground.
Figure 41 D is the attenuation curve of illustrated two filters.As by seen in Figure 41 D, the auxiliary common ground conductive plate 912 between first and second filters 914 and 916 is brought up to higher frequency with the result that the top layer of filter 900 and bottom merge with the resonance point of filter 900.The auxiliary isolation that common ground conductive plate 912 provides can improve crosstalk and the ground scattering property simultaneously with eliminating to and the printed circuit board (PCB) of filter 900 coupling between the complementary field sideband.The effect that the bottom of the filter 900 that auxiliary common ground conductive plate 912 produces and top layer also make differential mode in the plate 912 and common mode field produce faraday cell.
What Figure 25 represented is improved Another Application; it incites somebody to action as shown in fig. 1 differential mode and common-mode filter 10 and two MOV battery lead plates 700 couplings; battery lead plate is at the top of filter 10; battery lead plate is in the bottom of filter 10; formed a filter that has made up differential mode and common mode surge protection and capacitor filtering, shown in Figure 23.Assembly among Figure 25 a has made up the advantage of filter and MOV element, and assembly allows electric conductor 12a and 12b perforation coupling simultaneously.Embodiment shown in Figure 23 does not need to separate MOV, because its structure adopts surface mounting technology according to the present invention.Embodiment shown in Figure 25 a then needs to separate MOV and since MOV last porose all be disadvantageous to operation and expense, so the MOV element of the coupling aperture of boring a hole generally need not be arranged.In order to allow MOV 700 and the differential mode shown in Fig. 1 and the battery lead plate electrical couplings of common-mode filter 10 inside, some changes need be made in the surface of filter 10.The top 820 of differential mode and common-mode filter 10 and bottom 822 must change, and as shown in Figure 25 c, replace insulated hole 18 by perforated plate coupling aperture 718.The perforated plate coupling aperture 718 of top 820 and bottom 822 is the electric conductor 12a or the 12b on corresponding opposite respectively.Though do not illustrate among the figure, one in each perforated plate coupling aperture 718 and two battery lead plates that are embedded in differential mode and the common-mode filter 10 is electrically connected, thereby electric conductor 12a and 12b and battery lead plate separately are electrically connected, between conductor 12a and 12b, form a line to the line differential mode capacitor.In order to allow MOV 700 and the top and the bottom of differential mode and common-mode filter 10 to be coupled, perforated plate coupling aperture 718 comprises electric conducting material band 824, and one in two contacts of each MOV 700 is electrically connected with it.Each MOV 700 comprises two end points 828 and 830, MOV 700 and other circuit electrical couplings.As shown in 25a, the end points 830 of two MOV 700 by standard method as utilizing conducting surface 826 physics and the electrical couplings of solder joint 710 and differential mode and common-mode filter 10.The conducting surface 826 and common ground conductive plate 14 electrical couplings of differential mode and common-mode filter 10, as shown in fig. 1.The end points 828 of each MOV 700 is by solder joint 710 and conductive strips 824 physics and electrical couplings, and end points 828 is connected with 12b with separately electric conductor 12a, thus the internal electrical pole plate of connection differential mode and common-mode filter 10.Be its result shown in Figure 25 b, it is included in the assembly that differential mode and common mode MOV surge protection while differential mode and common mode capacitance filtering are arranged between end points 716a and the 716b, electric conductor 12a and 12b and end points 716a and 716b electrical couplings.
Shown in Figure 29 and 30 is another multicomponent surface mount differential mode and common-mode filter, and for adapting to various application, its design has a band filter.This particular design is applicable to many conductors electric power connector.As other embodiment of the present invention, bar band filter 642 comprises one group of common ground conductive plate 656 and is sandwiched in first and second battery lead plates 662 and 664 between each common ground conductive plate 656.As shown in Figure 29, bar band filter 642 has four groups of differential modes and common-mode filter.Each common ground conductive plate 656 is etched on the backing material 616 of predetermined electrical characteristic, as disclosed in the specification, the part of material 616 as insulating tape, has only ground connection to extend the edge that extends to backing material 616 with 660 on the both sides of each common ground conductive plate 656 like this.On banded backing material 616, also form each first and second battery lead plate 662 and 664 each battery lead plate is surrounded by material 616, be with 666 except the electrode at the edge that extends to backing material 616 extends.As by seen in Figure 29, each electrode of each first battery lead plate 662 extends with 666 opposite with 666 bearing of trend with the electrode extension of corresponding second battery lead plate 664.For making things convenient for layout to make electric conductor produce coupling, ground connection extend with 660 and the electrode structure of extending with 666 many forms can be arranged.As other each embodiment of the present invention, be contained in each differential mode in the bar band filter 642 and common-mode filter comprise first and second battery lead plates 662 that are sandwiched between the common ground conductive plate 656 and 664 and have predetermined electrical performance (not shown) between each common ground conductive plate and battery lead plate and make the auxiliary material of their mutual electrical isolation.Shown in Figure 30 is top view, bottom view and the end view of bar band filter 642, and the length of its first and second difference conductive strips 652 and 654 vertical support material 616s and be overlapped in the top of bar band filter 642 slightly is shown in Figure 30 a.Shown in Figure 30 d, the bottom of bar band filter 642 is identical with the top, allows surface mount bar band filter 642.Also extend at the top of bar band filter 642 and bottom at conductive strips 650 vertical two ends in public ground, as 650 parts that identified among Figure 30 a and the 30d.Bottom and top at bar band filter 642 also have auxiliary public ground conductive strips 650, but they do not extend to both sides in this structure.The first and second difference conductive strips 652 and 654 extend to corresponding one side of bar band filter 642, allow each electrodes of each first and second difference conductive strips 662 and 664 extend with 666 with its conductive strips electrical couplings separately, thereby allow external electrical conductor to be connected with each internal electrical pole plate of bar band filter 642.For clearly explanation, corresponding first and second battery lead plates 662 and the 664 and first and second difference conductive strips 652 and 654 comprise suffix (a) to (d), represent four differential modes in the bar band filter 642 and each in the common-mode filter respectively.Figure 31 is another example of bar band filter 642, and it comprises auxiliary first a battery lead plate 662e.By increasing an auxiliary electrical pole plate, bar band filter 642 can hold the odd number electric conductor.One needs the application example of odd number electric conductor is for the D connector filtering of 9 or 15 electric conductors is typically arranged.Do not illustrate among the figure, the difference of top view, bottom view and the end view of the bar band filter 642 shown in Figure 31 just needs an additional conductive band 652 of increase and one or more public ground conductive strips 650 to hold the coupling of auxiliary conductor.By increasing by the first battery lead plate 662e rather than corresponding second battery lead plate, battery lead plate 662e forms line to earth capacitance between it and common ground conductive plate 656.Though not and corresponding second battery lead plate of the first battery lead plate 662e, the electric conductor that is connected with the first battery lead plate 662e and and arbitrary electric conductor of being coupled of the second battery lead plate 664a-d between still have differential mode and common mode filtering.
Shown in Figure 32 to 37 is the multiple variation of surface mount differential mode of multicomponent shown in Figure 29 to 31 and common mode bar band filter.Referring to Figure 32 and 33, bar band filter 800 comprises one group of common ground conductive plate 656 and is sandwiched in first and second battery lead plates 662 and 664 between each common ground conductive plate 656.As the embodiment of front, bar band filter 800 has corresponding same differential mode of four docking points and common-mode filter, 1A, 4A, 5A and 8A counter electrode plate 662 and 2B, 3B, 6B and 7B counter electrode plate 664.Each common ground conductive plate 656 is etched on the backing material 616 of predetermined electrical characteristic, as disclosed in the specification, like this part of material 616 on the both sides of each common ground conductive plate 656 as insulating tape.Different with the embodiment shown in Figure 29 to 31, each common ground conductive plate 656 has part material 616 longitudinal extension on arbitrary of common ground conductive plate 656.On banded backing material 616, also form each first and second battery lead plate 662 and 664 each battery lead plate is surrounded by material 616, be with 666 except the electrode at the edge that extends to backing material 616 extends.The auxiliary material that predetermined electrical performance (not shown) arranged are between each common ground conductive plate and battery lead plate and make their mutual electrical isolation.The advantage of bar band filter 800 is that it provides the diversity of bigger connection and lower inductance is arranged.
Shown in Figure 33 is top view, bottom view and the end view of bar band filter 800, and the length of its first and second difference conductive strips 652 and 654 vertical support material 616s and be overlapped in the top of bar band filter 800 slightly is shown in Figure 33 a.Shown in Figure 33 d, the bottom of bar band filter 800 is identical with the top, allows mounted on surface bar band filter 800.Also extend at the top of bar band filter 800 and bottom at conductive strips 650 vertical two ends in public ground, as shown in Figure 33 a, 30d and 33e.The first and second difference conductive strips 652 and 654 extend to corresponding one side of bar band filter 800, allow each electrodes of each first and second difference conductive strips 662 and 664 extend with 666 with its conductive strips electrical couplings separately, thereby allow external electrical conductor to be connected with the first and second internal electrical pole plates.
Shown in Figure 34 and 35 is improved embodiment bar band filter 802 of the present invention, and its practical structures that to be each first and second difference conductive strips 662 extend with 666 with each electrode of 664 is different with direction.As among Figure 32 to 35 clearly shown in, the connection of bar band filter or pin configuration can be set to be adapted to any application.As shown in Figure 36 and 37, bar band filter 804 is improved embodiments, and its emphasis is in the connection on public ground.Referring to Figure 36, each common ground conductive plate 656 is etched on the backing material 616 of predetermined electrical characteristic by known systems, elongated like this material band 616 along one side of each common ground conductive plate 656 as insulating tape.
Shown in Figure 33 is top view, bottom view and the end view of bar band filter 800, and the length of its first and second difference conductive strips 652 and 654 vertical support material 616s and be overlapped in the top of bar band filter 800 slightly is shown in Figure 33 a.Shown in Figure 33 d, the bottom of bar band filter 800 is identical with the top, allows mounted on surface bar band filter 800.Also extend at the top of bar band filter 800 and bottom at conductive strips 650 vertical two ends in public ground, as shown in Figure 33 a, 30d and 33e.The first and second difference conductive strips 652 and 654 extend to corresponding one side of bar band filter 800, allow each electrodes of each first and second difference conductive strips 662 and 664 extend with 666 with its conductive strips electrical couplings separately, thereby allow external electrical conductor to be connected with the first and second internal electrical pole plates.
Shown in Figure 34 and 35 is improved embodiment bar band filter 802 of the present invention, and its practical structures that to be each first and second battery lead plate 662 extend with 666 with each electrode of 664 is different with direction.As among Figure 32 to 35 clearly shown in, the connection of bar band filter or pin configuration can be set to be adapted to any application.As shown in Figure 36 and 37, bar band filter 804 is improved embodiments, and its emphasis is in the connection on public ground.Referring to Figure 36, each common ground conductive plate 656 is etched on the backing material 616 of predetermined electrical characteristic by known systems, elongated like this material band 616 along one side of each common ground conductive plate 656 as insulating tape.Identical in the embodiment of first and second battery lead plates 662 and 664 basic and fronts is except the electrode of first and second battery lead plates 662 and 664 extends with the 666 same one sides from battery lead plate begin to extend insulating tape 616 in each common ground conductive plate 656 extension.Shown in Figure 37 is top view, bottom view and the end view of bar band filter 804, and the length of its first and second difference conductive strips 652 and 654 vertical support material 616s and be overlapped in the top of bar band filter 804 slightly is shown in Figure 37 a.Shown in Figure 37 d, the bottom of bar band filter 804 is identical with the top, allows mounted on surface bar band filter 804.In this embodiment, public ground conductive strips 650 vertical two ends and the one side of extending and surrounding bar band filter 804 fully in the top and the bottom of bar band filter 804 are as shown in Figure 37 c.As the first and second difference conductive strips 652 and 654, public ground conductive strips 650 also extend along the total length of coverage rate at the bottom and the top of bar band filter 804.The structure of bar band filter 804 be particularly useful for need be bigger the floor as the shielding and can absorb and disperse the application of more substantial heat and electromagnetic interference.
Figure 14 and 15 is illustrated in the differential mode that forms on film or the polyester film medium and the further embodiment of common-mode filter.The present embodiment comprises a kind of thin film dielectrics and comprises the first electrode difference plate 460 of a common ground conductive plate 480 and its back, is another common ground conductive plate 480 and the second electrode difference plate 500 then, is another common ground conductive plate 480 then.Each pole plate consists essentially of film 472, and it comprises multiple material such as polyester film but be not limited to polyester film, wherein metallization plate of film 472 complete metal generation.Utilize laser, can remove the part of metallization material to produce the isolation strip by predetermined figure.The first difference plate 460 has isolation strip, two laser borders 462 and 466, and they are divided into three conduction regions with the first difference plate 460: electrode 464, isolated electrode 468 and public electrode 470.The second difference plate 500 and the first difference plate, 460 something in common are also to have two isolation strip 506 and 504 that the second difference plate 500 is divided into three conduction regions: electrode 510, isolated electrode 502 and public electrode 508.For the first and second difference plates 460 and 500, thereby isolation strip 462 and 506 is the electrode 464 and 510 that large tracts of land is surrounded the first and second difference plates 460 and 500 that produces of U-shaped basically.U-shaped isolation strip 462 and 506 allows electrode 464 and 510 to extend to end points 476 and 514 respectively.462 and 506 extension component is 474 and 512 and 466 and 510 extension component is 473 and 513 from the isolation strip from the isolation strip.For fully with public electrode 470 and 508 and end points 476 and 514 isolate, parts 474 and 512 extend in the outer ring of U-shaped isolation strip perpendicular to the end points of U-shaped isolation strip 462 and 506 and from nearest end points 476 and 514 beginnings, and parts 473 and 513 are perpendicular to isolation strip 466 and 504 and from extending along its outer ring.In addition, the first and second difference plates 460 and 480 all have isolated electrode 468 and 502, and it is formed on the reverse side of end points 476 and 514 by isolation strip 466 and 504.
Common ground conductive plate 480 comprises isolation strip 482 and 492, and common ground conductive plate 480 is divided into three conduction regions: public electrode 488, isolated electrode 484 and isolated electrode 494.As shown in the figure, isolation strip 482 is vertical with 492 neighbour and be parallel to the left and right sides boundary strip of common ground conductive plate 480.Isolation strip 482 and 492 also comprises parts 496, the external vertical of its vertical component of 482 and 492 in the isolation strip is extended, isolation strip 482 and 492 position are such, when pole plate 460,480 and 500 piled up, they alignd with the U-shaped isolation strip 462 of the first and second difference plates 460 and 500 and 506 horizontal component.
Another characteristic is the filtering that common ground conductive plate 480 can be optimized to be used for AC or DC signal.Aforesaid isolation strip 492 and 482 is optimized for the filtering of DC signal.For the DC operation, isolated electrode 484 and 494 needs the very little area in common ground conductive plate 480 inside.When filter comprised thin film dielectrics and be used for the filtering of AC signal, isolated electrode 484 and 494 needed bigger area, and this can change isolation strip 486 and 490 by etching and realize.Vertically extending isolation strip 484 and 494 is leaned on very closely and is very near apart from the center of common ground conductive plate 480.In order to adapt to this variation, the parts 496 that extend from the external vertical of vertical component these parts when being used for DC are long.Though every kind of structure all provides the filtering to two kinds of electric currents, isolated electrode 484 and 494 area are big more, and the characteristic of AC filtering is good more.
Figure 15 is the profile of thin film dielectrics differential mode and common-mode filter 540, and it comprises one group of similar pole plate with Figure 14.The embodiment of surface mount chip as shown in Figure 11, film differential mode and common-mode filter 540 also can comprise more than five pole plates, as the coupling capacitance of parallel connection to increase total appearance value.
The top of filter 540 and bottom comprise protection cover layer 555.Being positioned under the top protective layer 555 is common ground conductive plate 480, is thereafter battery lead plate 460, is thereafter another common ground conductive plate 480, is thereafter another battery lead plate 500, is another common ground conductive plate 480 then.Repeat the common ground conductive plate of alternately arranging of said sequence and battery lead plate and can realize the capacity that adds.As shown in profile, every layer or pole plate comprise film 558, and film 558 has the metallized upper surface 556 of conduction, carve the isolation strip figure by laser on the metal surface and produce isolation pattern 554.Terminal conducting block 550 and 552 is made up of fine aluminium, and it is deposited on the edge and passes the film extension and produces the high conductive terminal of forming as by metal.Above-mentioned extension is produced by each pole plate of sequence stack, and each battery lead plate 460 or 500 is surrounded by common ground conductive plate 480, as shown in Figure 15.Battery lead plate 460 or 500 departs from and departs from the common ground conductive plate mutually and is beneficial to the border terminal.
Figure 16 to 19 is direct embodiments at differential mode that is preferred for motor and common-mode filter.Motor is huge electromagnetic radiation source.This point even also be obviously concerning the layman can find on the whole screen it all is " snowflake " if any crossing the most of people that start the dust catcher experience before the television set of work.This be since the electromagnetic interference of motor TV.The electromagnetic radiation source that dust catcher is unique anything but.Motor is widely used in the household electrical appliance as washing machine, dryer, dishwasher, mixer and hair-dryer.In addition, most of automobiles have many motors to control windscreen sleet brush, motorized window, electronic adjustment mirror, recoverable antenna and other many functions.Because motor popular and strengthened Electromagnetic Radiation Standards is so there is the demand of differential mode and common mode filtering.
Motor filter 180 can be made multiple shape, but it is a rectangle material 182 that includes one of a plurality of predetermined electrical performances basically in the embodiment shown in Figure 16.Be the external structure of filter 180 shown in Figure 16 a, it comprises rectangle material 182, conductive strips 184 and 194 and public conductive strips 186, and material 182 has an insulation axle perforation 188 of passing the center of filter 180.Be the end view of filter 180 shown in Figure 16 b, by conductive strips 184 and 194 and public conductive strips 186 between material 182 make its electric each other and physical isolation.Shown in Figure 16 c is the profile of Figure 16 a A along the line.As all aforesaid embodiments, physical structure of the present invention comprises conductive electrode 181 and 185 and be clipped in public conductive electrode 183 between them.Have the material 182 of predetermined electrical characteristic be dispersed between all electrodes with prevent each conductive electrode 181 and 185 and public conductive electrode 183 between be electrically connected.Similar with surface mount embodiment of the present invention, filter 180 all conductive strips 184 and 194 are electrically connected filter 180 internal electrodes and electric conductor.Conductive electrode 181 extends to fully with conductive strips 184 and links to each other so that required electric interfaces to be provided.As shown in Figure 16 c, conductive electrode 181 not exclusively extends to conductive strips 194 and links to each other, but is coupled with conductive electrode 185.Though do not illustrate among the figure, public conductive electrode 183 extends fully between public conductive strips 186 but is not connected with 194 with conductive strips 184.In addition, with signal ground or be coupled greatly, can produce the ground of one " truly " rather than internally by public conductive strips 186 by public conductive strips 186 generations.
Figure 16 d is the schematic diagram of differential mode and common mode motor filter 180, conductive electrode 181 and 185 arrives necessary two parallel-plates of line differential mode coupling filter capacitor as line among the figure, simultaneously they as line-ground common mode decoupling capacitor, wherein public conductive electrode 183 is as internally with public conductive electrode 183.Conductive strips shown in the figure 184,194 allow motor filter 180 to be connected with external electrical conductor with public conductive strips 186 in addition.The preferred embodiment of Figure 16 has only been expressed a public conductive electrode 183 and two conductive electrodes 181 and 185, and the applicant is concerned about is result by the shunt capacitance similar to aforesaid embodiment, utilizes a plurality of electrodes to obtain different capacitances.
Shown in Figure 17 is the electric and physical coupling of differential mode and common mode motor filter 180 and motor 200.As shown in Figure 17 a, motor filter 180 be placed on motor 200 above, oriented its outside motor shafts 202 that extend of motor 200.Motor shaft 202 passes the axis hole 188 of filter 180, and conductive strips 184 and 194 and link 196 electrical couplings are isolated with the rotor of motor 200 between them.Though do not illustrate among the figure, independently 196 of links are electrically connected with the power line of giving motor 200 power supplies.In case motor filter 180 is connected/is coupled with motor 200, then motor faceplate 208 is put on motor 200 and the filter 180, and motor shaft 202 passes the same hole at motor faceplate 208 centers simultaneously.208 fuselage physical connections of panel by clamp 206 and motor 200.Though do not illustrate among the figure, thus can by with public conductive strips 186 and motor housing coupling or public conductive strips 186 directly with circuit or wiring use filter 180 is internally greatly.
The logarithmic chart of Figure 18 is the contrast of the electromagnetic radiation of motor 200, wherein has the frequency function of the motor of basic filter to be expressed as 220 and have the frequency function of differential mode and common mode motor filter 180 to be expressed as 222.This figure illustrates the decay of the electromagnetic radiation that very little 20dB is arranged and in 0.1 to 1MHz scope more significant decay is arranged between 0.01MHz and about 10MHz.Can see, frequency range at 10～20MHz and Geng Gao, the decay of electromagnetic radiation big not as under the low frequency, but this is not very serious,, improved performance because thereby the good motor filter 180 of the frequency range work of most of motor below this can reduce electromagnetic radiation concerning great majority are used.
Differential mode shown in Figure 19 and common mode motor filter 230 are improved embodiments of the filter of Figure 16.It is most of identical with the embodiment of the filter shown in Fig. 1 that Figure 19 how firm and hard executed scheme, comprises the top coupling that makes plate and filter 230 and motor except the shape of plate and each plate but do not disturb motor shaft and the motor axis hole 242 of its rotation.Be each plate of filter 230 shown in Figure 19 a, comprise that 246, three plates of common ground conductive plate 232 and pair of conductive plate all have motor axis hole 242.Common ground conductive plate 232 comprises electric conducting material, and it is made by metal derby in preferred embodiments.Three blocks of plates all have at least two holes 252, and it receives electric conductor 244, as shown in Figure 19 b.What two conductive plates 246 among Figure 19 a were represented is the reverse side of plate 246.As describing in other embodiment, conductive plate 246 is made by the material 254 that the predetermined electrical performance is arranged, and wherein the another side of plate 246 is a nonconductive surface 234 to the one side of plate 246 by conducting surface 236 coverings.In order to make corresponding conducting surface 2236 electrical couplings of each electric conductor 244 and each conductive plate 246, one of two holes 252 are surrounded by dead ring 238 for coupling aperture 240 another holes 252.Two holes 252 in the common ground conductive plate 232 are surrounded by dead ring 238 and prevent being electrically connected between common ground conductive plate 232 and the arbitrary electric conductor 244.
It shown in Figure 19 b the effective physical coupling of common ground conductive plate 232 and conductive plate 246.Common ground conductive plate 232 is sandwiched between the conductive plate 246, and wherein the nonconductive surface 234 of each conductive plate 246 links to each other relatively and with one of both sides of common ground conductive plate 232.Conductive plate 246 is placed the dead ring 238 that makes each plate 246 and is changed to arbitrary conducting surface 236 couplings of having only one of two electric conductors 244 and conductive plate 246.In case common ground conductive plate 232 and conductive plate 246 physical coupling, the whole device of then forming differential mode and common mode motor filter 230 is placed on the top of motor, and motor shaft passes the axis hole of each plate simultaneously.
The schematic diagram of filter element shown in Figure 19 c, independent conducting surface how to interact the formation line-line and the line-earth capacitance of its expression conductive plate, thereby filter 230.Because conductive plate 246 is basic identical and arrangement is different with common ground conductive plate 232, schematic diagram shown in Figure 19 c is represented the conducting surface 236 of independent conductive plate 246 with initial reference number.
It shown in Figure 20 and 21 the high power embodiment of differential mode of the present invention and common-mode filter.It shown in Figure 20 a the accurate schematic diagram of physical structure of the pole plate of the filter shown in the composition diagram 20b.Can see that referring to Figure 20 a and 20b common ground conductive plate 292 still is sandwiched in respectively between two the conductive electrode plates 270 and 270 ' that are connected/are coupled with electric conductor 275a and 275b.Each conductive electrode plate 270 and 270 ' includes the material 264 of predetermined electrical performance, and each plate has conducting surface to produce electric connector simultaneously.With after 270 ' is connected, conducting surface is covered by insulating material at electric conductor 275a and 275b and conductive electrode plate 270.Conductive electrode plate 270 and 270 ' typical adhesive material and common ground conductive plate 292 physical coupling by known technology.Figure 21 more clearly shows high power differential mode and common-mode filter 260, and wherein Figure 21 a represents the physical implementation scheme and Figure 21 b represents schematic diagram.As shown in Figure 21 a, filter 260 comprises the common ground conductive plate 262 between the insulating material dish 264 that is sandwiched in the predetermined electrical performance.By conductive electrode 270 and 270 ' supports insulative disk of material 264 suitably, coupling axle 278 passes hole 266 (not shown)s and passes dish 264 and common ground conductive plate 262 simultaneously.For the ease of the filter 260 of the condition of design higher electric current and voltage, common ground conductive plate 262, conductive electrode 270 and 270 ' and the size of disk of material 264 typically the embodiment than front of the present invention is big.In order to allow filter 260 to be connected with external electrical conductor, conductive electrode 270 has the link 284 of extension, makes itself and link 275a and 275b mechanical couplings by common mode as tightening screw or packing ring.Link 275a and 275b are installed in to produce above the casing cover 282 and comprise casing cover 282, common ground conductive plate 262, conductive electrode 270 and 270 ' and the once assembling of disk of material 264.An element is placed in the element shell 276, from common ground conductive plate 262 extended ring flanges 272 and 280 couplings of shell installing hole.This structure provide that a kind of common ground conductive plate 262 produces internally with circuit or the method that is coupled greatly.As other embodiments of the present invention, conductive electrode 270 is expressed as the face of separation, forms necessary two parallel-plates of line-line capacitance of coupling between link 274.Conductive electrode 270 form line-ground common mode decoupling capacitor with common ground conductive plate 262 respectively and common ground conductive plate 262 as internally.
Be phase place T network filter 940 shown in Figure 42 A and the 42B, it is the improved application of disclosed each surface mount differential mode in front and common-mode filter.Phase place T network filter 940 comprises differential mode and common-mode filter 942, and it has the public ground conductive strips 944 and the first and second difference conductive strips (not shown) that are positioned at differential mode and common-mode filter 942 two ends.With the coupling of differential mode and common-mode filter 942 two ends be respectively inductance ferrite housing 952 and 954.Each inductance ferrite housing 952 and 954 comprises that welding Ferrite Material is with first and second difference conductive strips (not shown) of differential mode and common-mode filter 942 and inductance ferrite housing interior welds separately.Shell 954 (with 952) comprises the battery lead plate end points 948 (946) with the both sides physical coupling of each shell, simultaneously a part pass hole 960 make end points 946 and 948 and the first and second difference conductive strips of filter 942 be electrically connected.Be more clearly visible in the auxiliary converse digraph of the shell 954 (952) that this structure can be represented from dotted line 966.Figure 42 B is the schematic diagram of phase place T network filter 940, thereby a plurality of inductance 958 are electroplated the phase place T network filter 940 shown in end 946 and 948 coupling generation Figure 42 A with first and second of differential mode and common-mode filter 942 among the figure.
Phase place T network filter 940 has its superiority in high signal code and high frequency noise are used, because the present embodiment can be diverted to noise ground and allow the flow through end points of equipment of high signal code, bigger noise attentuation is arranged simultaneously.The end points 946 of first and second battery lead plates and 948 is for filter 940 provides this application required high electric current current, and inductance ferrite housing 952 and 954 produces magnetic field.The effect that this assembly has improved the high-frequency filter is the slope of the attenuation characteristic of filter 940 near per ten times of 40-60dB.Phase place T network filter 940 is specially adapted to low impedance circuit.
As seen, differential mode can have many different application and should be noted that some characteristics are common to all embodiments with the common-mode filter structure.The first, the material that the predetermined electrical characteristic is arranged can be a kind of in any embodiment, comprises thin mould of insulating material, metal oxide varistor material, Ferrite Material and other more new materials such as polyester or sintering polycrystal, but is not limited thereto.No matter use which kind of material, the assembly of common ground conductive plate and electrodes conduct plate produce one group of electric capacity electric conductor between form a line-line differential mode coupling capacitance and from electric conductor to forming two lines-ground decoupling capacitor.There is the material of electrical characteristic will change capacitance and/or increase additional characteristic such as overvoltage and surge protection or increase inductance, resistance or above-mentioned combination.
The second, in all embodiments, no matter be illustrated or not shown, the quantity of common ground conductive plate and battery lead plate can be much producing the electric capacity of many parallel connections, thereby produce the capacitance that increases.
The 3rd, can in all embodiments, use round the auxiliary common ground conductive plate of the assembly of central conductive plate and one group of conductive electrode provide an increase internally with surge dissipate district and real faraday cell.
At last, look back many embodiments, it should be apparent that, because its physical structure comes from the structure of common ground conductive plate and conductive electrode plate, so the electrical characteristic that can be as required or the application scenario of filter change shape, thickness or size.
In fact, in such application as communication chip in, differential mode and common-mode filter can be produced on simply in the silicon chip and directly be integrated in the integrated circuit, and be not shown.Differential mode can embed with common-mode filter and filtering directly from the communicating by letter or data wire of circuit board link, so just reduced the expense of circuit board actual needs and reduced the size of all circuit, satisfy the demand that simpler product is arranged.Had integrated circuit that electric capacity is etched on the silicon pedestal, this just allows structure of the present invention to adopt existing technology today.
Though main contents of the present invention, preferred embodiment and preferred operations have been done detailed description here, what needn't explain is the form that it is not limited to disclosed special instruction.Like this, it is evident that concerning the professional and technical personnel can not break away from thought of the present invention or scope makes various changes with the preferred embodiment here.

Claims (32)

1. electrode assembly, it comprises:
First electrode, its determines following element at least, (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel;
Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate;
Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel;
Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; And,
Described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make any straight line of described second electrode and described third electrode contact with described median plate.
2. electrode assembly, it comprises:
First electrode, it determines following element at least, (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board is on described median plate, and described median plate is on described lower panel;
Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate;
Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel;
Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; And,
Wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make described median plate make the shielding fully each other of described second electrode and described third electrode.
3. method of making electrode assembly, it comprises:
First electrode is set, and first electrode is determined following element at least, (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel;
Second electrode is set, and second electrode is determined second battery lead plate at least, and wherein, described second battery lead plate is below described upper board and on described median plate;
Third electrode is set, and third electrode is determined the third electrode plate at least, and wherein, described third electrode plate is below described median plate and on described lower panel;
Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; And,
Wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make described median plate make the shielding fully each other of described second electrode and described third electrode.
4. method that transmits, it comprises:
A kind of electrode assembly is set, and it comprises:
First electrode, its determines following element at least, (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel;
Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate;
Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel;
Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively; And,
Wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make any straight line that passes described second electrode and described third electrode contact with described median plate;
Described second electrode and described third electrode are connected into a circuit; And
Signal is transmitted to described second electrode or described third electrode at least.
5. the electrode assembly described in the claim 1, wherein said second electrode all has identical substantially size and shape each other with described third electrode.
6. the electrode assembly described in the claim 5, wherein said second electrode and described third electrode are lined up opposite orientations relative to one another.
7. the electrode assembly described in the claim 2, wherein said second electrode all has identical substantially size and shape each other with described third electrode; And,
Wherein, described second electrode and described third electrode are lined up opposite orientations relative to one another.
8. the electrode assembly described in the claim 6 also comprises a kind of material that predetermined properties is arranged, can be used as medium.
9. the electrode assembly described in the claim 2 also comprises a kind of material that predetermined properties is arranged, can be used as medium;
Wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make any straight line that passes described second electrode and described third electrode contact with described median plate.
10. the electrode assembly described in the claim 8 or 9, also comprise a kind of such device: each electrode comprises at least one pair of hole respectively in the whole described electrode in the described at least electrode assembly; And
Each corresponding pair of holes in the whole described electrode of described electrode assembly comprises at least one insulated hole and a coupling aperture.
11. make the method for the electrode assembly described in the claim 3, also comprise a kind of such device: each electrode comprises at least one pair of hole respectively in the whole described electrode in the described electrode assembly; And
Wherein, each the corresponding pair of holes in the whole described electrode of described electrode assembly comprises at least one insulated hole and a coupling aperture.
12. make the method for the electrode assembly described in the claim 3, also comprise a kind of material that predetermined properties is arranged, can be used as medium; And
Wherein, described material can be used for the described electrode in the described electrode assembly is spaced from each other at least;
Wherein, described second electrode and described third electrode all have substantially the same size and shape each other; And,
Wherein, described second electrode and described third electrode are lined up the opposed orientation arrangement relative to one another; And,
Wherein, described electrode assembly can be used as the em filtering device.
13. the method that transmits described in the claim 4, wherein, described third electrode and described median plate in the described electrode assembly are all located separately by this way, make any straight line that passes described second electrode and described third electrode contact with described median plate.
14. the method that transmits described in the claim 13, wherein, the whole described electrode in the described electrode assembly all comprises at least one pair of hole separately; And
Wherein, the described described pair of holes separately in the whole described electrode in the described electrode assembly comprises an at least one insulated hole and a coupling aperture.
15. an electrode assembly, it comprises:
The a plurality of bucking electrodes that always intercouple conductively, wherein, described a plurality of bucking electrodes comprise at least three bucking electrodes;
Isolate and a mutual electrode that is shielded of isolating conductively with described a plurality of bucking electrodes conductively; And
Wherein, each bucking electrode in described a plurality of bucking electrodes is relative to one another by such location and sizing, makes that passing any straight line of the described a pair of electrode that is shielded contacts with described each bucking electrode in described a plurality of bucking electrodes.
16. the electrode assembly described in the claim 15 also comprises being arranged to such an extent that insert first pair of bucking electrode in described a plurality of bucking electrodes of described at least three bucking electrodes.
17. the electrode assembly described in the claim 16 also comprises being arranged to such an extent that insert second pair of bucking electrode in described a plurality of bucking electrodes of at least one bucking electrode in described at least three bucking electrodes.
18. the electrode assembly described in the claim 1,2,5,6,7,8,9,15,16 or 17 also comprises at least one Line To Line capacitor and at least two line direct-to-ground capacitance devices.
19. the electrode assembly described in the claim 1,2,5,6,7,8,9,15,16 or 17 can be used as capacitor.
20. the electrode assembly described in the claim 1,2,5,6,7,8,9,15,16 or 17 can be used as the em filtering device of a part that belongs at least one exciting circuit.
21. an electrode assembly, it comprises:
First electrode, its determines following element at least, (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel;
Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate;
Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel;
Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively;
Wherein, described median plate has a median plate external boundary; And
Wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make to pass the straight line of described second electrode and described third electrode or pass inside, or contact with described median plate external boundary.
22. the device described in the claim 21, wherein said second battery lead plate has the second battery lead plate first type surface, and the described second battery lead plate first type surface becomes " C " shape haply.
23. the device described in the claim 22, wherein said third electrode plate has third electrode plate first type surface, and described third electrode plate first type surface becomes " C " shape haply.
24. the device described in the claim 23, described " C " shape of described " C " shape of the wherein said second battery lead plate first type surface and described third electrode plate first type surface is arranged relative to one another.
25. the device described in the claim 22, the wherein said second battery lead plate first type surface is determined a cave, also comprises first conduction region in the described cave and second conduction region in the described cave.
26. the device described in the claim 25, wherein, described first conduction region has the surface of determining first hole, and described second conduction region has the surface of determining second hole.
27. a connector construction that is used for the RJ45 connector, it comprises:
First electrode, its determines following element at least, (1) upper board, (2) median plate and (3) lower panel, wherein, described upper board on described median plate and described median plate on described lower panel;
Second electrode, it determines second battery lead plate at least, wherein, described second battery lead plate is below described upper board and on described median plate;
Third electrode, it determines the third electrode plate at least, wherein, described third electrode plate is below described median plate and on described lower panel;
Wherein, described first electrode, described second electrode and described third electrode are isolated mutually conductively;
Wherein, described median plate has a median plate external boundary; And
Wherein, described second electrode, described third electrode and described median plate are so positioned and sizing relative to one another, make to pass the straight line of described second electrode and described third electrode or pass inside, or contact with described median plate external boundary.
28. a structure and an IC chip that comprises structure described in the claim 27, wherein, described connector is electrically connected on the conductor in the described IC chip.
29. a structure and a PC plate that comprises structure described in the claim 27, wherein, described connector is connected mechanically to described PC plate.
30. a structure and a casing that comprises structure described in the claim 27, wherein, described connector is connected mechanically to described casing.
31. the structure described in the claim 29, wherein, described connector is electrically connected on the conductor on the described PX plate equally.
32. the structure described in the claim 30, wherein, described connector is electrically connected on the conductor on the described casing equally.
CN 200510065061 1998-01-19 1999-01-16 Paired multi-layered dielectric independent passive component architecture Pending CN1694328A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/008769 1998-01-19
US09/008,769 US6097581A (en) 1997-04-08 1998-01-19 Paired multi-layered dielectric independent passive component architecture resulting in differential and common mode filtering with surge protection in one integrated package
US09/056379 1998-04-07

Related Parent Applications (1)

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CN1694328A true CN1694328A (en) 2005-11-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113225037A (en) * 2021-03-26 2021-08-06 洛坦电子科技(上海)有限公司 Filter for silicon carbide high-frequency controller
CN114448374A (en) * 2020-11-04 2022-05-06 珠海市海米软件技术有限公司 Filter circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114448374A (en) * 2020-11-04 2022-05-06 珠海市海米软件技术有限公司 Filter circuit
CN113225037A (en) * 2021-03-26 2021-08-06 洛坦电子科技(上海)有限公司 Filter for silicon carbide high-frequency controller
CN113225037B (en) * 2021-03-26 2024-03-29 洛坦电子科技(上海)有限公司 Filter for silicon carbide high-frequency controller

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