WO2005117255A1 - Circuit de filtre, ci logique, module multi-puces, connecteur équipé de filtre, appareil de transmission et système de transmission - Google Patents

Circuit de filtre, ci logique, module multi-puces, connecteur équipé de filtre, appareil de transmission et système de transmission Download PDF

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Publication number
WO2005117255A1
WO2005117255A1 PCT/JP2005/009623 JP2005009623W WO2005117255A1 WO 2005117255 A1 WO2005117255 A1 WO 2005117255A1 JP 2005009623 W JP2005009623 W JP 2005009623W WO 2005117255 A1 WO2005117255 A1 WO 2005117255A1
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WIPO (PCT)
Prior art keywords
winding
filter circuit
transmission
filter
circuit
Prior art date
Application number
PCT/JP2005/009623
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English (en)
Japanese (ja)
Inventor
Hisaaki Kanai
Norio Chujyou
Original Assignee
Hitachi Communication Technologies, Ltd.
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Publication date
Application filed by Hitachi Communication Technologies, Ltd. filed Critical Hitachi Communication Technologies, Ltd.
Publication of WO2005117255A1 publication Critical patent/WO2005117255A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/0006—Printed inductances
    • H01F17/0013—Printed inductances with stacked layers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0021—Constructional details
    • H03H2001/0085—Multilayer, e.g. LTCC, HTCC, green sheets
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/06—Frequency selective two-port networks including resistors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0237—High frequency adaptations
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
    • H05K1/183—Components mounted in and supported by recessed areas of the printed circuit board

Definitions

  • Filter circuit logic IC, multi-chip module, filter mounted connector
  • the present invention relates to a filter circuit that is less susceptible to signal waveform deterioration due to extraneous magnetic field noise and is capable of reducing the generation of radiated electromagnetic noise, and in particular, relates to an IC that transmits and receives high-speed signals, and It relates to devices such as communication devices, servers, and communication ICs that are configured using the devices.
  • a low-noise filter circuit for reducing high-frequency noise is provided by a driver circuit, a receiver circuit, or a transmission circuit. Often installed on the road.
  • These filter circuits are generally constituted by passive elements such as inductors and capacitive elements.
  • passive elements such as inductors and capacitive elements.
  • an induced current is induced in the direction that cancels the external magnetic field noise. Noise may be superimposed on the transmission signal, causing loss of data or malfunction of the transmission device.
  • electromagnetic noise is radiated from the inductor, which may cause malfunction of other circuits or devices.
  • Patent Document 1 Japanese Unexamined Patent Publication No. No. 280
  • shielding the entire IC including the circuit from the external circuit with a grounded conductor plate (shield case) the effect of external magnetic field noise is reduced, and the radiated electromagnetic noise from the circuit is reduced. There are ways to reduce it.
  • Patent Document 1 JP-A-6-350280
  • An object of the present invention is to provide a filter circuit that eliminates an increase in the cost of a transmission device, and an IC and a transmission device provided with the filter circuit.
  • an inductor forming a filter circuit such as a high-pass filter circuit has at least two inductors having a center axis in a vertical direction on the same plane and different positions of the respective center axes. It is formed of windings, each winding is wound so that the electromagnetic noise radiated from the windings has the opposite sign, and connected so as to cancel the induced current generated by the external magnetic field noise.
  • the present invention provides an inductor constituting a filter circuit, wherein a first winding having one end as an input, and a first winding disposed on the same plane as the first winding and having one end connected to the first winding. And a second winding having the other end as an output, and a signal current flowing in each of the first winding and the second winding is wound in a vortex in the opposite rotation direction.
  • the first winding and the second winding are connected so that induced currents generated in the first winding and the second winding due to external magnetic field noise flow in opposite directions.
  • the present invention is a transmission system configured by connecting a driver circuit and a receiver circuit by a transmission path, wherein the transmission path includes the filter circuit as a noise path filter circuit. It is characterized by. Further, the present invention is a transmission system configured by connecting a driver circuit and a receiver circuit by a transmission line, wherein the transmission line is provided with the filter circuit to compensate for waveform deterioration in the transmission line. It is characterized in that it is provided with a packaged filter IC as a hynos filter circuit.
  • the present invention is a logic IC characterized in that the filter circuit is provided in a logic IC having a logic circuit for performing a logical operation.
  • the present invention is also a multi-chip module, wherein a die on which the filter circuit is mounted and a die on which a logic circuit is mounted are mounted together in a package.
  • the present invention is also a connector mounted with a filter, which is a connector for connecting between transmission paths, and includes a filter chip in which the filter circuit is formed into a chip.
  • the present invention is also a transmission device that determines a transmission path of a transmission signal to which an optical module connected to an optical fiber is also obtained by a switch IC and transmits the transmission path, wherein the transmission path in the optical module or the switch IC is provided.
  • the filter circuit is provided as a high-pass filter circuit.
  • the present invention also relates to a backplane having a transmission path formed by connecting a plurality of switch boards each having an optical module connected to an optical fiber and a switch IC for determining a transmission path of a transmission signal obtained by the optical module.
  • a transmission device configured to be electrically connected to a board by a backplane connector, wherein the filter circuit is provided as a high-pass filter circuit in a transmission path in the optical module, the switch IC, or the backplane connector. It is characterized by.
  • an inductor constituting a filter circuit is formed by two windings having a center axis in a vertical direction on the same plane and having different positions of the respective center axes, By winding each winding so that the electromagnetic noise radiated from the winding has the opposite sign to each other, and canceling out the induced current generated by the external magnetic field noise, a relatively distant circuit or The influence of not only the external magnetic field noise of the device power but also the external magnetic field noise of the adjacent circuit power can be similarly reduced, and the radiated electromagnetic noise from the filter circuit can also be reduced.
  • the filter circuit for reducing the induced current and the radiated electromagnetic noise is connected It is possible to suppress an increase in costs such as assembly costs for ICs and transmission devices that do not require the use of a ground conductor plate.
  • FIG. 1A is a configuration diagram showing a first embodiment of the high-pass filter circuit of the present invention fabricated on a Si substrate or the like
  • FIG. 1B is a diagram showing a first embodiment of the high-pass filter circuit of the present invention.
  • the high-pass filter circuit according to the first embodiment includes two windings 102a and 102b having a central axis in the same plane in the vertical direction and having different positions of the respective central axes, and one end is connected to the ground terminal 109.
  • the first resistor 103 having one end connected to the inductor 101, the other end connected to the first resistor 103, and the other end connected to an input terminal 107 for inputting a signal from an external circuit.
  • the inductor 101 suppresses the induced current generated by external magnetic field noise (about 10 GHz to 5 GHz or more) having the same vector as the magnetic field radiated from each winding when the signal current is transmitted. It is characterized by comprising two windings 102a and 102b so as to cancel each other.
  • the signal currents flowing through the two windings 102a and 102b are connected so that the eddies in the opposite rotational directions are wound, and the induced current generated by the external magnetic field noise flows in the opposite direction. It is characterized by that.
  • the two windings 102a, 1 constituting the inductor in the filter circuit of the present invention.
  • the 02b By configuring the 02b to have the same inductance characteristics, it is possible to effectively cancel the induced current and radiated electromagnetic noise that occur in each of them.
  • the length of the transmission path constituting the inductor 101 is reduced to one fifth of the wavelength (about 3 to 6 cm) of the external magnetic field noise (about 10 to 5 GHz) to be reduced or the transmission signal (10 to 1 GHz). 1/5! Of the band wavelength (approximately 3 to 30 cm) of the band! This is to reduce the phase difference of the induced current generated in each winding, effectively reduce the effect of external magnetic field noise, and reduce the phase difference of the electromagnetic noise radiated from each winding. This is to reduce the sum of electromagnetic noise. In other words, by shortening the length of the transmission line that forms the inductor, it is possible to effectively reduce transmission waveform degradation due to higher frequency external magnetic field noise, and to reduce the electromagnetic noise radiated by the inductor. The reduction effect also increases.
  • FIG. 2 (a) shows the amount of induced current 201a, 201b generated in each of windings 102a, 102b due to extraneous magnetic field noise having a magnetic field strength with a maximum amplitude of about lWb in the filter circuit shown in FIG.
  • the amount of induced current 201d is shown, with the horizontal axis representing time and the vertical axis representing current.
  • the amount of induced current 201a generated in one winding 102a and the amount of induced current 201b generated in the other winding 102b have opposite signs, and their amplitudes are substantially the same.
  • the size has become. That is, the sum 201c of the induced currents generated in the two windings 102a and 102b can be made substantially zero.
  • the maximum amount of induced current 201d generated in the comparative example in which the inductor is formed by one winding is 0.2 mA or more, so that the signal waveform deterioration is larger than that of the inductor configuration of the present invention.
  • FIG. 2 (b) shows the magnetic field at the center of each of windings 102a and 102b when a signal current having a maximum amplitude of about 16 mA flows through inductor 101 in the filter circuit shown in FIG.
  • the magnetic field strengths 202a and 202b the sum of the respective magnetic field strengths 202c, and an inductor having an inductance value equivalent to that of the inductor 101 shown in FIG.
  • the magnetic field strength 202d in the example is shown, with the horizontal axis representing time and the vertical axis representing magnetic field strength.
  • the magnetic field strength 202a radiated from one winding 102a and the magnetic field strength 202b radiated from the other winding 102b have opposite signs to each other, and have substantially the same amplitude.
  • the size has become. That is, the sum 203c of the magnetic field intensities radiated from the two windings 102a and 102b can be made substantially zero.
  • the maximum magnetic field strength 202d generated in the comparative example in which the inductor is formed by one winding is equal to or more than 10OWb, so that the influence on the external circuit is greater than that of the inductor configuration of the present invention.
  • the case where a Si substrate is used as the substrate on which the high-pass filter circuit is mounted is shown.
  • a ceramic substrate which is not limited to the Si substrate, or another semiconductor substrate such as GaAs, is used.
  • a low-pass filter circuit that passes only a low frequency band or a specific frequency band is used as the filter circuit. A similar effect can be obtained even in a band-pass filter circuit that passes only the signal.
  • the filter circuit of the present invention for reducing induced current and radiated electromagnetic noise is an assembly cost for an IC or transmission device that does not require the use of a grounded conductor plate (shield case) described in Patent Document 1. And so on can be prevented from increasing.
  • FIG. 3 is a diagram illustrating a configuration of a second embodiment of the filter circuit in the case where the capacitance element and the electrode of the input / output terminal are shared in the first embodiment of the filter circuit illustrated in FIG.
  • the filter circuit of FIG. 3 differs from that of FIG. 1 in that the capacitor 106 shares one electrode with an input terminal 107 for inputting a signal from an external circuit connected to the other end of the second resistor 104. And an output terminal 108 that outputs a signal to an external circuit connected to the other end of the third resistance element 105, and a capacitance element 106b that shares one of the electrodes.
  • the other electrode of the capacitor 106a and the other electrode of the capacitor 106b are connected by a conductor 120.
  • the two capacitive elements 106a and 106b are connected in series between the input terminal 107 and the output terminal 108.
  • the chip size can be reduced as compared with the filter circuit shown in FIG.
  • the cost of integrated circuits can be reduced, and the cost of transmission equipment can be suppressed from increasing.
  • FIG. 4 shows a configuration of another embodiment of an inductor that can further reduce the length of a transmission line forming the inductor.
  • two windings 301a and 301b having a center axis in the same plane in the vertical direction and having different positions of the respective center axes are arranged at the center of the windings 301a and 301b.
  • Magnetic metals 302a and 302b are arranged at the center of the windings 301a and 301b.
  • the magnetic metals 302a and 302b By arranging the magnetic metals 302a and 302b at the center of the windings 301a and 301b, the magnetic flux density passing through the center of the windings increases, so that the transmission is shorter than that of an inductor without the magnetic metal. Since the same inductance value can be obtained with the path length, the effect of higher frequency external magnetic field noise can be reduced, and the effect of reducing electromagnetic noise radiated from the inductor can be increased.
  • FIG. 5 shows an embodiment in which the inductors in the filter circuits of FIGS. 1 and 3 are configured by a plurality of winding layers.
  • the duct has a first winding 401 having one end on an input side (not shown), and a second winding 402 having one end connected to the first winding 401 and having one end connected to the first winding 401.
  • a fourth winding 404 is arranged in the vertical direction of the three windings 403, and has one end connected to the third winding 403 and the other end on the output side (not shown).
  • the first winding 401 and the second winding 402 are configured such that the signal currents flowing in the respective windings form a vortex in the same rotational direction
  • the third winding 403 and the fourth winding 404 are The signal current flowing through each of the first winding 401 and the signal current flowing through the second winding 402 is configured to wind in a vortex in a rotation direction opposite to that of the signal current flowing through the first winding 401 or the second winding 402. It is assumed that the second winding 402 and the third winding 403 are connected so that the induced current generated in the second winding 402 and the induced current generated in the third winding 403 and the fourth winding 404 flow in opposite directions.
  • an inductor when an inductor is configured by arranging two windings in two layers in the horizontal direction, the required number of layers of the substrate increases compared to when an inductor is configured with one winding, but more An equivalent inductance value can be obtained with a small mounting area.
  • the inductor configuration in which the windings are formed in two layers is shown, but the induced current generated by the external magnetic field noise is canceled out, and the total electromagnetic noise radiated from each winding is small. The same effect can be obtained in an inductor having three winding layers or an inductor having four winding layers, as long as the winding is configured as described above.
  • the filter circuit can be compared with the filter circuits of the embodiment shown in Figs. 1 and 3.
  • the mounting area of the entire circuit can be reduced.
  • FIG. 6 is a diagram showing an embodiment of the filter circuit of the present invention configured using chip coils, chip capacitors, and chip resistors of individual components.
  • the filter circuit according to the third embodiment includes a chip coil 501 having one end connected to a ground terminal 508, a first chip resistor 502 having one end connected to the chip coil 501, and one end connected to an input terminal 506 for inputting a signal.
  • the chip coil 501 is formed of two windings having a center axis in the same plane in the vertical direction and having different positions of the center axis, as shown in the first to fourth embodiments. Are connected so that the signal currents flowing through the windings form spirals in the opposite directions of rotation, and the induced currents generated in the respective windings by external magnetic field noise flow in the opposite directions. It is characterized by. As described above, even when the filter circuit is configured using the individual components, it is possible to reduce the radiated electromagnetic noise while being affected by the external magnetic field noise.
  • the filter IC packaged with the bypass filter circuit described in the first embodiment for compensating waveform deterioration in the transmission path is configured by a driver circuit and a receiver circuit.
  • a second embodiment applied to a transmission device (transmission system) will be described with reference to FIG.
  • the transmission device (transmission system) shown in FIG. 7 includes a driver circuit 602 for transmitting a transmission signal of about 10 GHz to 1 GHz or more to the transmission path 604, and a transmission circuit of about 10 GHz to 1 GHz or more transmitted through the transmission path 604.
  • a filter circuit (specifically, a high-pass filter circuit) provided on the transmission line 604 for improving a transmission waveform deteriorated by a dielectric loss or a skin effect in the transmission line 604.
  • the driver circuit 1201 includes a logical operation circuit 1202 for performing arithmetic processing on data, and an output buffer 1203 for transmitting data.
  • the Recino circuit 1204 includes an input buffer 1205 for receiving data, and a logical operation circuit 1206 for performing arithmetic processing on received data.
  • the filter IC 601 is formed of an inductor that reduces the radiated electromagnetic noise described in the first embodiment and is not easily affected by an external magnetic field noise of about 10 GHz to 5 GHz or more. It is characterized by the following.
  • the filter IC is It is shown in a package with a line! /, But it may be a package such as BGA ⁇ flip chip! / ⁇ .
  • the data signal output from the driver circuit 602 to the transmission line 604 becomes a signal waveform in which the rise and fall characteristics are degraded due to the skin effect and the dielectric loss in the transmission line 604.
  • the filter IC 601 shapes the signal waveform to improve the rise-Z fall characteristic by compensating for the influence of the loss in the transmission line 604.
  • the shaped signal waveform is output from the filter IC 601 and transmitted to the receiver circuit 603 via the transmission path 604.
  • the filter IC 601 hardly radiates electromagnetic noise even when transmitting a signal current, so that the influence on other circuits and devices is small.
  • the filter IC 601 can stably improve the transmission waveform.
  • the transmission circuit is configured using the filter IC in which the filter circuit (specifically, the no-pass filter circuit) according to the present invention is packaged, so that the radiation is radiated from the transmission system.
  • a transmission system that can stably transmit (operate) transmission signals of about 10 GHz to 1 GHz or more because it can hardly increase electromagnetic noise and reduce the effects of external magnetic field noise of about 10 GHz to 5 GHz or more. It can be built.
  • the logic IC according to the third embodiment includes a filter circuit 901 for compensating a loss in a transmission line and shaping a transmission waveform, a logic circuit 902 for performing a logical operation on a signal, the filter circuit 901 and the logic circuit 902.
  • the filter circuit 901 is characterized in that the filter circuit 901 is configured by an inductor that reduces the radiated electromagnetic noise described in the first embodiment and is not easily affected by external magnetic field noise.
  • the transmission signal reaches the filter circuit 901 via the bonding wire 905.
  • the signal that has reached the filter circuit 901 is shaped by the filter circuit 901 and transmitted to the logic circuit 902. At this time, even when a signal current is transmitted in the filter circuit 901, almost no electromagnetic noise is radiated, and, for example, an adjacent circuit such as the logic circuit 902 is affected by induced current caused by radiated magnetic field noise. Can be reduced.
  • the filter circuit according to the present invention on the die, the influence of not only the external magnetic field noise at a relatively distant place but also the adjacent circuit force and the radiated magnetic field noise on the filter circuit is obtained. Since it is possible to reduce noise and radiated electromagnetic noise from the filter circuit, it is possible to form a logic IC that reduces data loss and errors during logic operation processing.
  • the method of electrically connecting the die and the package by the bonding wire has been described.
  • the method of electrically connecting the die and the package is, for example, A similar effect can be obtained by mounting a die as a flip chip on a substrate and connecting it to a package.
  • the multi-chip module according to the fourth embodiment is a filter circuit die equipped with the filter circuit (specifically, a high-pass filter circuit) for compensating for the loss in the transmission line described in the first embodiment.
  • a logic circuit die 1002 equipped with a logic circuit for performing a logical operation on a signal
  • a node / cage 1003 equipped with the filter circuit die 1001 and the logic circuit die 1002, and between dies or between dies and packages.
  • a bonding wire 1004 for electrically connecting the terminals is formed.
  • the fourth embodiment differs from the third embodiment in that a die 1001 equipped with a filter circuit is separated from a die 1002 equipped with a logic circuit. There is.
  • the filter circuit mounted on the filter circuit die 1001 is characterized by being configured with an inductor, which reduces radiated electromagnetic noise and is not easily affected by external magnetic field noise.
  • the multi-chip module by mixing the filter circuit die equipped with the filter circuit according to the present invention and the logical circuit die, not only the external magnetic field noise at a relatively distant place but also the filter circuit can be obtained.
  • the logic circuit is newly added by mounting the filter circuit and the logic circuit on different dies. In some cases, it may not be necessary to manufacture the IC in such a case. In such a case, the manufacturing cost is lower than that of the logic IC according to the third embodiment shown in FIG. It becomes possible to reduce the door.
  • a method of electrically connecting between dies or between a die and a package by a bonding wire has been described, but a method of electrically connecting between dies or between a die and a package is described. Then, for example, a similar effect can be obtained by a method in which the die is mounted on a substrate as a flip chip and connected to a die or a package.
  • the filter circuit described in the first embodiment (specifically, no , A bypass filter circuit).
  • the filter-mounted connector according to the fifth embodiment includes a backplane connector 1101 for electrically connecting two substrates, and a filter circuit for compensating for the loss in the transmission line described in the first embodiment ( Specifically, it is equipped with a high-pass filter circuit) and a filter chip 1102 connected to a transmission line in the backplane connector 1101.
  • the transmission signal of about 1 OGHz to lGHz or more reaching the daughter board pin 1104 is transmitted to the filter chip 1102, and the transmission path in the filter chip 1102 is transmitted.
  • the transmission waveform is shaped by compensating for the loss.
  • the shaped transmission signal is output to another external circuit (not shown) via the daughter board pin 1104 or the mother board pin 1103.
  • the filter chip 1102 equipped with the filter circuit according to the present invention hardly radiates electromagnetic noise, so that the influence on other circuits and devices is small and the filter chip 1102 Since the influence of the induced current generated by the magnetic field noise radiated from the circuit or the device can be reduced, it is possible to stably improve the transmission waveform.
  • the filter chip 1102 is applied to the backplane connector 1101 .
  • a connector used at the end of a cable for connecting a board or an apparatus may be used. You may apply.
  • the filter-mounted connector using the filter circuit according to the present invention, the electromagnetic noise radiated from the connector can be hardly increased, and the effect of the external magnetic field noise can be reduced. As a result, it is possible to manufacture a filter-mounted connector that operates stably, and it is not necessary to mount the filter circuit inside the IC or on the board, so that the IC or board can be miniaturized. Become.
  • FIG. Fig. 11 shows a transmission device (transmission system) that switches the transmission path of a transmission signal transmitted by an optical fiber, and a plurality of optical signals that convert a transmission signal of about 10 GHz to 1 GHz or more into an optical-electrical signal.
  • a module 702 a plurality of optical fibers 701 for transmitting an optical signal, a plurality of switch ICs 705 for determining a transfer path of the transmission signal, a plurality of switch boards 703 on which the plurality of optical modules 702 and the switch IC 705 are mounted, It comprises a backboard 704 for transmitting signals between the plurality of switchboards 703, and a plurality of backplane connectors 706 for electrically connecting each of the plurality of switchboards 703 to the backboard 704. That is, the transmission device (transmission system) includes a plurality of optical fibers 701 connected.
  • a plurality (many) of switch boards 703 mounted with an optical module 702 and a switch IC 705 for switching a transfer path of a transmission signal from the optical module 702 to a frequency of about 10 GHz to 1 GHz or more are formed on the back board 704 in the form of a blade. Connected with connector 706.
  • the filter circuit according to the present invention is applied to the optical module 702, the switch IC 705, or the backplane connector 706. Since the optical module 702 and the switch IC 705 include a driver circuit 602 and a receiver circuit 603 as shown in FIG. 7, a filter circuit (a circuit) is provided between the driver circuit 602 and the receiver circuit 603. It is possible to provide a filter IC) 601. Further, the filter chip 1102 can be inserted into the knock plane connector 706 as in the fifth embodiment shown in FIG.
  • the optical signal received from the optical fiber 701 is converted into an electric signal of about 10 GHz to 1 GHz or more by the optical module 702 to which the optical fiber 701 is connected. Further, the converted electric signal is transmitted from the optical module 702 to the switch IC 705, and the transfer path of the electric signal is determined in the switch IC 705. At this time, depending on the determined transfer path, the electric signal is transferred to the other optical module 702 on the switch board 703 or to the optical module 702 on the other switch board 703 via the back board 704. You. The transferred electric signal is converted from the electric signal into an optical signal by the optical module 702, and connected to the optical module 702, and the optical signal is transmitted to another transmission device by the optical fiber 701.
  • the transmission device As described above, by configuring the transmission device using the optical module, the switch IC, and the connector to which the filter circuit according to the present invention is applied, the influence of extraneous magnetic field noise is reduced, and the data loss or the transmission device is reduced. It is possible to reduce the occurrence of erroneous operations and to reduce electromagnetic noise radiated from the device.
  • Specific examples of such a transmission device include, but are not limited to, a switch board, a router, a server, a computer, and peripheral devices of a computer.
  • the induced current generated by the external magnetic field noise generated by the adjacent circuit power is reduced, the electromagnetic noise radiated from the inductor cap is suppressed, and the IC and the transmission device are reduced. It is possible to provide a filter circuit that eliminates the cost increase, and an IC and a transmission device including the filter circuit.
  • FIG. 1 is a schematic configuration diagram and a circuit diagram showing Example 1 of a filter circuit according to a first embodiment of the present invention.
  • FIG. 2 is a diagram showing an amount of induced current generated in a winding constituting an inductor and a magnetic field intensity radiated from the winding.
  • FIG. 3 is a schematic configuration diagram showing Example 2 of the filter circuit according to the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing a configuration of an inductor used in the filter circuit according to the present invention and capable of further shortening the length of a transmission line.
  • FIG. 5 is a schematic diagram showing a case where an inductor is configured by four windings, which is used in a filter circuit according to the present invention.
  • FIG. 6 is a schematic configuration diagram showing Example 3 of the filter circuit according to the first embodiment of the present invention, which is configured by a chip coil, a chip capacitor, and a chip resistor of individual components.
  • FIG. 7 is a diagram showing a transmission system according to a second embodiment of the present invention to which a filter IC in which a filter circuit is IC packaged is applied.
  • FIG. 8 is a perspective view showing a logic IC according to a third embodiment of the present invention, in which a filter circuit is mounted and packaged on a die on which a logic circuit for performing a logical operation on a signal is mounted. is there.
  • FIG. 9 is a multi-chip according to a fourth embodiment of the present invention, in which a plurality of dies such as a die equipped with a filter circuit and a die equipped with a logic circuit are mixed in the same knockout. It is a perspective view which shows a module.
  • FIG. 10 is a perspective view showing a filter-mounted connector according to a fifth embodiment of the present invention, in which a filter chip in which a filter circuit is packaged is mounted on a backplane connector.
  • FIG. 11 is a perspective view showing a transmission apparatus for transmitting and receiving high-speed signals using a filter circuit according to a sixth embodiment of the present invention.
  • FIG. 12 is a configuration diagram showing one embodiment of a driver circuit and a receiver circuit used in the transmission device (transmission system) according to the present invention.

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Abstract

Un circuit de filtre, un module optique, un CI, un connecteur, un appareil de transmission et un système de transmission, disposant du circuit de filtre qui réduit un courant induit causé par un bruit de champ magnétique externe provenant d'un circuit adjacent, supprime le bruit électromagnétique irradié d'un inducteur et résout le problème de l'augmentation du prix des CI ; appareil de transmission. Dans un circuit de filtre composé d'éléments passifs comme un élément de capacitance, des inducteurs, etc., les inducteurs comprennent deux enroulements respectifs ayant des axes centraux dans la direction verticale dans le même plan mais situés à des positions différentes ; ces enroulements sont raccordés l'un à l'autre de manière à ce que les courants passent par les enroulements respectifs partant dans des spirales mutuellement inversées et que le courant induit, causé par le bruit du champ magnétique externe, se déplace dans la direction opposée.
PCT/JP2005/009623 2004-05-26 2005-05-26 Circuit de filtre, ci logique, module multi-puces, connecteur équipé de filtre, appareil de transmission et système de transmission WO2005117255A1 (fr)

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US11190149B2 (en) 2013-03-15 2021-11-30 Qorvo Us, Inc. Weakly coupled based harmonic rejection filter for feedback linearization power amplifier
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US9859863B2 (en) 2013-03-15 2018-01-02 Qorvo Us, Inc. RF filter structure for antenna diversity and beam forming
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US10965258B2 (en) 2013-08-01 2021-03-30 Qorvo Us, Inc. Weakly coupled tunable RF receiver architecture
US10796835B2 (en) 2015-08-24 2020-10-06 Qorvo Us, Inc. Stacked laminate inductors for high module volume utilization and performance-cost-size-processing-time tradeoff
US11139238B2 (en) 2016-12-07 2021-10-05 Qorvo Us, Inc. High Q factor inductor structure
US10181478B2 (en) 2017-01-06 2019-01-15 Qorvo Us, Inc. Radio frequency switch having field effect transistor cells
US10277222B1 (en) 2018-02-28 2019-04-30 Qorvo Us, Inc. Radio frequency switch
US10263616B1 (en) 2018-03-29 2019-04-16 Qorvo Us, Inc. Radio frequency switch
US10659031B2 (en) 2018-07-30 2020-05-19 Qorvo Us, Inc. Radio frequency switch

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