CN203368416U

CN203368416U - Intensity adjusting circuit of network signal coupling

Info

Publication number: CN203368416U
Application number: CN 201320452243
Authority: CN
Inventors: 莫家平; 刘有志
Original assignee: HONGYE TECHNOLOGY Inc
Current assignee: HONGYE TECHNOLOGY Inc
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2013-12-25
Anticipated expiration: 2023-07-26

Abstract

The utility model provides an intensity adjusting circuit of network signal coupling. The intensity adjusting circuit of network signal coupling comprises a processing circuit arranged on a circuit board, the processing circuit possesses a first connecting end electrically connected with a network connector and a second connecting end connected with a network chip, and a plurality of channels each of which possesses two circuits are connected and arranged between the first and second connecting ends. Each channel of the processing circuit is located between the first and second connecting ends and is equipped with a coupling modules possessing first capacitors and an anti-electromagnetic interference module possessing inductors, two second capacitors are in series connection between one ends of the two inductors and the two circuits and then are connected with a grounding end, and the circuits at the other ends of the inductors are in series connection with resistors respectively. Therefore, the intensity adjusting circuit of network signal coupling has the current-limiting or voltage division function on the condition that the resistance values of the resistors are fixed, forms the impedance matching with the second capacitors to reduce the voltage to thereby avoid the excessive intensity of a high frequency network signal, and accords with the product communication standard requirement better.

Description

The intensity Circuit tuning of network signal coupling

Technical field

The utility model is to provide a kind of intensity Circuit tuning of network signal coupling, espespecially each passage for the treatment of circuit reaches anti-electromagnetic interference module for being provided with coupling module between the first connection and the second link, just can make voltage drop to avoid signal strength signal intensity excessive by resistance and the electric capacity formation impedance matching of anti-electromagnetic interference module, more meet the communication standard requirement of product.

Background technology

Computer technology fast development now, its computer development trend also, speed strong towards calculation function reaches soon the direction that volume is little and strides forward, due to network communications technology also rapidly flourish in, and bring people's life, study, work and leisure into another different brand-new boundary in the past, make can mutually transmit required real time information, advertising or contact mail etc. by network communication between men, simultaneously by the various information of Web search, instant messaging or online game, allow between people and network relation more fervent and inseparable.

Moreover, the part of network has by two kinds of modes such as cable connection and wireless transmission transmits data, the cable interconnection technique just needs to be equiped with network connector, along with computer or notebook computer development trend now, the network connector that makes computer inside also with significantly dwindle, but network connector is in the computer downsizing, need to consider the signal interference problem that its galvanomagnetic effect produces, just there is manufacturer to be provided with a signal processing module in network connector inside, refer to shown in Fig. 5, this signal processing module A is for having circuit board A1, and all there is magnetic core A21 in the upper set a plurality of transformation loop A 2 of circuit board A1 with filter coil A3, A31, and each magnetic core A21, be arranged with wire A22 on A31, A32, again by wire A22, each head end of A32 is welded in the upper corresponding contact of circuit board A1, though its network signal that network connector can be received carries out filtering, filtering noise is processed, and the actual useful signal of reservation, but, this transformation loop A 2 need to be utilized manual by wire A22 with filter coil A3, A32 is wound in magnetic core A21, not only comparatively loaded down with trivial details on A31, and cause that arranged the man-hour of expending, the problem that production efficiency is poor, more because can't cost can't effectively being reduced do automated production, and this wire A22, the number of turns that A32 is wound around, the differences such as density distance also can affect whole effect, cause product quality very different.

Yet, along with the utilization of network is more and more wider, the data capacity of transmission over networks is also increasing and apply not use, so network vendors just constantly improves network transfer speeds in order to meet user's demand, from early stage 10Mbps, 100Mbps and 1Gbps etc., more than the fiber optic network transmission speed that even makes to release now can reach 10Gbps, because transformation loop A 2 is to utilize inductance characteristic to isolate electric and coupled signal, so in order to make signal be delivered to secondary side by primary side, transformation loop A 2 just must have predetermined sense value, and because induction reactance is directly proportional to operating frequency and inductance sense value, in the situation of the frequency increase that signal transmits, its induction reactance also will with increase, and the induction reactance increase can make signal attenuation become large, and cause network easily to break or the slack-off disappearance of network transfer speeds, and these transformation loop A 2 operating frequencies can only be in specific narrower frequency range, when if network transfer speeds reaches 1Gbps, just can because of the characteristic of transformation loop A 2, be the low frequency low-intensity, medium frequency high strength and the formed curve of high-frequency low-intensity, insertion loss while causing high-frequency transmission significantly increases and causes signal strength signal intensity significantly to reduce.

Therefore, in order to solve the problem of above-mentioned transformation loop A 2, this case applicant once utilized existing electronic component and circuit design to research and develop improvement, it is to be provided with signal processing circuit on circuit board, refer to shown in Fig. 6, this treatment circuit B has the first link B1 and the second link B2, and a plurality of circuit B3 between the first link B1 and the second link B2 are provided with coupling module B4 and anti-electromagnetic interference module B5, when the external network signal transfers to the first link B1 via network connector, each first electric capacity B41 that can transfer to coupling module B4 by a plurality of circuit B3 isolates electric and coupled signal, each second electric capacity B51 of the anti-electromagnetic interference module B5 of recycling is directed to earth terminal B52 and arrange and fall apart after the harmonic wave of signal low frequency part is absorbed, just can be almost the complete network chip that transfers to original signal by coupling module B4, to reduce the decay of signal, and still there is good network signal coupling effect under high network, but the international standard of working out because of different product measures the requirement that standard has different eye pattern masks (Mask), signal after the coupling module B4 of this kind for the treatment of circuit B processes transmitted under (HitRate) through regular hour or signal bit, though its test signal can be by the checking of shade, while but carrying out again the limit (Margin) the value test of shade maximum, just can cause because signal strength signal intensity is excessive amplitude line ball on its longitudinal axis (voltage axis), and be difficult for reaching the communication standard requirement that meets product, therefore, the international standard that will how to work out according to different product utilizes existing electronic component and circuit design to carry out the excessive problem of effective address signal intensity, be engage in this journey dealer the direction place that urgently research improves.

Therefore, novel creator is because transformation loop A 2 production costs of existing signal processing module A are high, signal attenuation phenomenon during high-frequency transmission, and problem and the disappearance of the treatment circuit B on circuit board on using, be to collect related data via in many ways assessing and considering, and utilize the research and development experience for many years of engaging in the industry constantly study and revise, the beginning is designed the novel birth of the intensity Circuit tuning of this kind of network signal coupling.

Summary of the invention

Main purpose of the present utility model is to provide a kind of intensity Circuit tuning of network signal coupling, be to be between the first link of this treatment circuit institute tool and the second link as being provided with a plurality of passages that there are respectively two circuits, and each passage for the treatment of circuit is provided with the anti-electromagnetic interference module of coupling module and the tool inductance of tool the first electric capacity between the first link and the second link, and be connected in again earth terminal after between each two inductance, one end and two circuits, being in series with two the second electric capacity, and be in series with resistance on each circuit of inductance another end, just can under the situation fixing by the resistance value of resistance, be the function with Limited Current or dividing potential drop, and make voltage drop excessive with the intensity of avoiding the high frequency network signal with the second electric capacity formation impedance matching, more can reach the communication standard requirement that meets product.

In order to achieve the above object, the utility model provides a kind of intensity Circuit tuning of network signal coupling, include the treatment circuit be arranged on circuit board, and there is the first link that is electrically connected at default network connector and be connected in the second link of presetting network chip in treatment circuit, and be provided with a plurality of passages that there are respectively two circuits between the first link and the second link, and each passage for the treatment of circuit is provided with one or more coupling modules and anti-electromagnetic interference module between the first link and the second link, and there are a plurality of the first electric capacity that are series on each circuit in coupling module, anti-electromagnetic interference module has a plurality of inductance that are series on each circuit, and be in series with two the second electric capacity between each two inductance, one end and two circuits, be connected in again earth terminal, should on each circuit of inductance another end of anti-electromagnetic interference module, be in series with respectively resistance.

Wherein, the resistance value of the resistance of this anti-electromagnetic interference module is between 0.1～100 ohm.

Wherein, the resistance value of the resistance of this anti-electromagnetic interference module is 3.3 ohm.

The utility model can have the function of Limited Current or dividing potential drop under the situation fixing by the resistance value of resistance, and makes voltage drop excessive with the intensity of avoiding the high frequency network signal with the second electric capacity formation impedance matching, more meets the communication standard requirement of product.

The accompanying drawing explanation

The calcspar that Fig. 1 is the utility model preferred embodiment.

The circuit diagram that Fig. 2 is the utility model preferred embodiment treatment circuit.

The calcspar that Fig. 3 is another preferred embodiment of the utility model.

Fig. 4 is the eye pattern of the utility model treatment circuit when network test.

Fig. 5 is the stereo appearance figure of existing signal processing module.

The circuit diagram that Fig. 6 is another existing treatment circuit.

Description of reference numerals: 1-treatment circuit; 11-the first link; 12-the second link; The 13-passage; The 131-circuit; The 14-coupling module; 141-the first electric capacity; 15-prevents the electromagnetic interference module; The 151-inductance; 152-the second electric capacity; The 153-earth terminal; 154-resistance; The 2-circuit board; The 3-network connector; The 4-network chip; The A-signal processing module; The A1-circuit board; A2-transformation coil; The A21-magnetic core; The A22-wire; The A3-filter coil; The A31-magnetic core; The A32-wire; The B-treatment circuit; B1-the first link; B2-the second link; The B3-circuit; The B4-coupling module; B41-the first electric capacity; B5-prevents the electromagnetic interference module; B51-the second electric capacity; The B52-earth terminal.

Embodiment

For reaching above-mentioned purpose and effect, the technological means that the utility model adopts and structure thereof, hereby draw and illustrate with regard to preferred embodiment of the present utility model that in detail its structure is as follows with function, in order to do profit, understands fully.

Refer to shown in Fig. 1 to Fig. 3, be respectively the calcspar of the utility model preferred embodiment, the circuit diagram for the treatment of circuit and the calcspar of another preferred embodiment, can know and find out in figure, the utility model includes treatment circuit 1 and circuit board 2, wherein this treatment circuit 1 is arranged on circuit board 2, and there is the first link 11 that is electrically connected at network connector 3 and the second link 12 that is connected in network chip 4, and be provided with a plurality of passages 13 that there are respectively two circuits 131 between the first link 11 and the second link 12, and each passage 13 for the treatment of circuit 1 is provided with one or more coupling modules 14 and anti-electromagnetic interference module 15 between the first link 11 and the second link 12, and there are a plurality of the first electric capacity 141 that are series on each circuit 131 adjacent to the first link 11 places in coupling module 14, another anti-electromagnetic interference module 15 has a plurality of inductance 151 that are series on each circuit 131, and after between each two inductance, 151 1 ends and two circuits 131, being in series with two the second electric capacity 152, be connected in again earth terminal 153 and form grounded circuit, and be in series with respectively resistance 154 on inductance 151 another ends each circuit 131 adjacent to the second link 12 places.

Moreover, the first link 11 for the treatment of circuit 1 is electrically connected at a plurality of conducting terminals of 3 tools of network connector, and be electrically connected at a plurality of pins on network chip 4 by the first link 11, and be positioned at the first link 11 on treatment circuit 1 and better being embodied as of 12 passages that are connected with 13 of the second link has four, and be connected to the MX0+ of the first link 11 by each circuit 131 2 ends of passage 13, MX0-, MX1+, MX1-, MX2+, MX2-, MX3+, the MD0+ of MX3-and the second link 12, MD0-, MD1+, MD1-, MD2+, MX2-, MD3+, MD3-, such as use simple and easy modification and the equivalent structure that the utility model specification and graphic content are done to change, all should in like manner be contained in the scope of the claims of the present utility model, close and give Chen Ming.

Treatment circuit 1 of the present utility model is arranged on circuit board 2, and directly be provided with network chip 4 on circuit board 2 after, a plurality of conducting terminals of device 3 connected to the network only are connected for a kind of state of preferably implementing again, also circuit board 2 can be arranged to network connector 3 inside, with network chip 4 set on the external circuit board (not shown), be connected again, but how this part related network connector 3 is connected configuration with network chip 4 is the category of prior art, and the formation of this thin section is not also the main points of founding of this case, does not hereby remake one and repeats.

Yet, the chip that above-mentioned network chip 4 is a voltage mode, when the coupling module 14 of network chip 4 transmission drive voltage signal to treatment circuit 1, because be that and then voltage one changes during the signal transmission, so not needing to be provided with resistance, network chip 4 can not carry out the signal transmission, just can produce the transient state electric charge (as positive charge) of single polarity in the time of can making driving voltage flow to the one end by the first electric capacity 141 of coupling module 14, the first electric capacity 141 another ends produce the transient state electric charge (as negative electrical charge) of another polarity, and at an end of stop supplies positive charge to the first electric capacity 141 after one period scheduled time, the another end of the first electric capacity 141 just can be poured off negative electrical charge along each circuit 131, can reach the effect of signal coupling with this, and because the first electric capacity 141 also can not make signal directly by circuit 131, and there is the function of the reverse current of preventing, therefore, speed while being discharged and recharged due to the first electric capacity 141 is relevant with time constant, so must make time constant and signal period collocation, just can provide time that the first electric capacity 141 discharges and recharges just can guarantee complete signal transmission and can truncated signal, and after the appearance value of this first electric capacity 141 increases time constant also can with increase, therefore the appearance value of the first electric capacity 141 is can be between 100 μ F～0.01 μ F, the better 0.1 μ F that is embodied as.

In addition, the impedance (Z) of the first electric capacity 141 of coupling module 14 is called capacitive reactance, its unit is ohm (Ω), the formula of capacitive reactance is Z=1/(2 π * f*C), wherein f is frequency (Hz), the appearance value (F) that C is electric capacity, by above-mentioned formula, can be learnt, the capacitive reactance size is inversely proportional to the appearance value of operating frequency and electric capacity, so use the first electric capacity 141 with identical appearance value in the situation that the signal frequency increase, the capacitive reactance meeting with reduce, and the decay of signal also can diminish, just can provide good network connectivity and signaling rate also can accelerate, this kind utilizes the first electric capacity 141 of coupling module 14 in the situation that signal frequency is higher, its signal strength signal intensity also can with the characteristic of increase, and in the situation (being greater than 1Gbps) that network (frequency range) is more and more higher now, can utilize the direct current formation electric field induction of the first electric capacity 141 isolation computer end to make signal coupling, and then make the coupling effect of high frequency network signal more good.

By upper, signal after processing by coupling module 14 due to treatment circuit 1 has decay hardly, so be almost the complete network chip 4 that transfers to original signal, but network signal is transmitted as and is the multiple increase, and understand at the 125MHz of low frequency and the 250MHz place of high frequency the harmonic wave that produces larger intensity (dB), and have other signal in the process because of the signal transmission and enter the situation generation that produces noise jamming, just in the time of can utilizing electric current to increase by two inductance 151 of anti-electromagnetic interference module 15, energy temporarily can be stored with field form, and the characteristic that the energy in magnetic field is discharged to resist curent change when electric current reduces is absorbed the harmonic wave of higher-frequency part in frequency range, and the second electric capacity 152 of anti-electromagnetic interference module 15 is owing to having high-pass filtering (HighPass) function, and along with the appearance value of the second electric capacity 152 reduce its can filtering signal frequency will with increase, just the appearance value of capable of regulating the second electric capacity 152 make signal can by but noise by filtering, it is to utilize the ability that stores electric charge to absorb in frequency range than the harmonic wave of low frequency part, the harmonic wave of low frequency part being branched to earth terminal 153 discharges again, and there is the effect of filtering low-frequency noise, can not produce the harmonic wave of high band or low-frequency range after making signal transfer to network chip 4, effectively to reduce it to the interference that generates electromagnetic waves of peripheral electronic equipment.

Please arrange in pairs or groups and consult Fig. 1, 2, shown in 4, be respectively the calcspar of the utility model preferred embodiment, the circuit diagram for the treatment of circuit and the treatment circuit eye pattern when network test, can know and find out in figure, when network chip 4 transmission drive voltage signal during to the treatment circuit 1 that arranges on circuit board 2, can utilize coupling module 14 the first electric capacity 141 in the situation that signal frequency increase make capacitive reactance with reduce, can guarantee signal strength signal intensity with the decay that reduces signal, and there is good high frequency network signal coupling effect, also can utilize the inductance 151 of anti-electromagnetic interference module 15 and the second electric capacity 152 to be absorbed the harmonic wave of signal medium and low frequency and HFS, signal is transferred to after network chip 4 just not can be to the interference that generates electromagnetic waves of peripheral electronic equipment, and because coupling module 14 and the anti-electromagnetic interference module 15 for the treatment of circuit 1 is to utilize general electronic component to coordinate circuit design to weld to be located on circuit board 2 to form, just do not need to utilize the mode of hand winding to make coil, not only can effectively reduce and produce required man-hour and cost, and there is the volume production of being convenient to, the quality keyholed back plate easily and the effect reduced costs.

Moreover, better being embodied as for the treatment of circuit 1 has four passages 13 circuit 131 of eight altogether, and the differential signal line that the circuit 131 organization center impedances that are 50 ohm by two sections isometric impedances are 100 ohm is to becoming the communication standard of industry, mainly in order to impedance matching, reduce the discontinuity of impedance on transmission path, and the stability in the time of can avoiding having influence on the signal transmission because of the network signal reflection, owing in the design of the motherboard in computer being mostly the inductance characteristic isolation electrical equipment that utilizes transformer, but because transformer has predetermined sense value, just can cause the power output of network chip to produce about 5% decay, so setting to improve, the power output of general networking chip has more 5%, can balance out thus the decay that transformer produces.

By upper, can decay hardly and may cause the excessive problem of signal strength signal intensity for the signal after coupling module 14 processing that improve treatment circuit 1, this case applicant then in the inductance 151 of anti-electromagnetic interference module 15 adjacent to each circuit 131 at the second link 12 places on for being in series with resistance 154, just the function that there is Limited Current or dividing potential drop in can the situation fixing by the resistance value of resistance 154, and make voltage drop with the second electric capacity 152 formation impedance matchings, excessive with the intensity of avoiding the high frequency network signal, and the resistance value of this resistance 154 is can be between 0.1～100 ohm (Ω), and on each two circuits 131 for the treatment of circuit 1, better enforcement is in series with respectively the resistance 154 that a resistance value is 3.3 ohm and forms the differential signal line pair of 6.6 ohm, can impedance matching approach middle cardiac impedance, to balance out 5% power output that network chip 4 has more and pad value, can not to depart from central value too many, but when practical application, also can adjust according to actual needs or circuit design, to obtain better impedance matching.

Yet, at present industry is that shade is tested (MaskTesting) for the method that improves testing efficiency institute and often use, and the international standard of working out according to different product measurement standard also has different eye pattern masks (as shown in Figure 4), wherein the transverse axis of this eye pattern is time shaft (Time), the longitudinal axis is voltage axis (V), can know and find out in figure, signal after the coupling module 14 for the treatment of circuit 1 is processed transmitted under (HitRate) through regular hour or signal bit, not only can verify by shade, and when the limit of carrying out the shade maximum (Margin) value is tested, its output voltage is+Vout=1012.3mV,-Vout=1010.4mV, can meet and measure standard for the requirement between 950～1050mV, and this symmetry amplitude is 1.02, can meet the measurement standard can be because of the excessive line ball of signal strength signal intensity for the requirement between 0.98～1.02, more can reach the communication standard requirement that meets product.

Above-mentioned detailed description is for a kind of preferably possible embodiments explanation of the utility model, only this embodiment is not in order to limit claim of the present utility model, all other do not break away from the equalization completed under the skill spirit that the utility model discloses to be changed and modifies change, all should be contained in the scope of the claims that the utility model contains.

In sum, the intensity Circuit tuning of the network signal coupling that the utility model is above-mentioned, for really reaching its effect and purpose, therefore the utility model is really the creation of a practicality excellence, meets the application important document of new patent in fact, files an application in accordance with the law.

Claims

1. the intensity Circuit tuning of network signal coupling, it is characterized in that, include the treatment circuit be arranged on circuit board, and there is the first link that is electrically connected at default network connector and be connected in the second link of presetting network chip in treatment circuit, and be provided with a plurality of passages that there are respectively two circuits between the first link and the second link, and each passage for the treatment of circuit is provided with one or more coupling modules and anti-electromagnetic interference module between the first link and the second link, and there are a plurality of the first electric capacity that are series on each circuit in coupling module, anti-electromagnetic interference module has a plurality of inductance that are series on each circuit, and be in series with two the second electric capacity between each two inductance, one end and two circuits, be connected in again earth terminal, should on each circuit of inductance another end of anti-electromagnetic interference module, be in series with respectively resistance.

2. the intensity Circuit tuning of network signal coupling according to claim 1, is characterized in that, the resistance value of the resistance of this anti-electromagnetic interference module is between 0.1～100 ohm.

3. the intensity Circuit tuning of network signal coupling according to claim 1, is characterized in that, the resistance value of the resistance of this anti-electromagnetic interference module is 3.3 ohm.