Transformer Coupled Patents (Class 333/177)
  • Patent number: 10979015
    Abstract: A common-mode choke coil includes a first filter unit and a second filter unit, each of which serves as a common-mode filter unit and is formed by arranging a primary coil and a secondary coil in a stacking direction. Of the first filter unit and the second filter unit, the first filter unit has a resonant frequency different from that of the second filter unit, and the line length is different between the primary coil and the secondary coil.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: April 13, 2021
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Katsufumi Sasaki
  • Patent number: 10915684
    Abstract: The following relates generally to design and redesign of digital circuits. In one disclosed embodiment, a circuit is annotated by identifying at least one possible error location according to an error library; the at least one possible error location is localized; and the circuit is redesigned based on the localized at least one possible error location.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: February 9, 2021
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Alexander Feldman, Ion Matei, Johan de Kleer
  • Patent number: 10868509
    Abstract: A filter structure includes a ground plane in a first metal layer of an IC package, a plate in a second metal layer of the IC package, a dielectric layer between the ground plane and the plate, the ground plane, the dielectric layer, and the plate thereby being configured as a capacitive device. An inductive device in a third metal layer of the IC package is electrically connected to the plate, and a perimeter of the plate is aligned with a perimeter of the inductive device.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: December 15, 2020
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventor: Ming Hsien Tsai
  • Patent number: 10756638
    Abstract: A vehicle electric drive includes a battery, an electric machine, and a variable voltage converter. The variable voltage converter includes switches, a transformer having a pair of windings sharing a common terminal with a series connected input capacitor, and an inductor electrically between the switches and transformer. The transformer and input capacitor are in parallel with the battery. The variable voltage converter is configured to boost voltage of the battery via operation of the switches.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: August 25, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Baoming Ge, Lihua Chen
  • Patent number: 10686240
    Abstract: Balun circuit arrangement with a balanced port side having two balanced terminals and an unbalanced port side having an unbalanced terminal. A first series connection of a first inductive impedance element (L1) and a first capacitive impedance element (C1) is present between a negative terminal of the two balanced terminals and the unbalanced terminal. A second series connection of a second inductive impedance element (L2) and a third inductive impedance element (L3) is present between a positive terminal of the two balanced terminals and the unbalanced terminal, and a second capacitive element (C2) is connected between a node connecting the second and third inductive element and a ground connection. The balun circuit arrangement may be used in a combination with an oscillator circuit and a single ended antenna.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: June 16, 2020
    Assignee: Qorvo International PTE. LTD.
    Inventor: Yilong Shen
  • Patent number: 10652050
    Abstract: A PoDL system conducts differential data and DC power over the same wire pair, and various DC coupling techniques are described that improve DC voltage coupling while attenuating AC common mode noise. Pairs of differential mode chokes (DMCs) are used to share current supplied by a power supply. In one embodiment, one DMC is coupled to the line side of a common mode choke (CMC), and one DMC is coupled to the PHY side of the CMC. The line-side DMC has windings that are loosely magnetically coupled so that DMC does not present a very low impedance to AC common mode noise on the wires. Therefore, the performance of the wires' RC termination circuitry is not adversely affected by the line-side DMC when minimizing reflections of common mode signals. The DMCs may use the same magnetic core, and the CMC may be series CMCs that used the same magnetic core.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: May 12, 2020
    Assignee: Linear Technology Holding LLC
    Inventor: Gitesh Bhagwat
  • Patent number: 10522282
    Abstract: An inductor having a first coil of metal trace configured in an open loop topology and placed in a first metal layer; a second coil of metal trace configured in an open loop topology and placed in the first metal layer; and a third coil of metal trace configured in a closed loop topology and placed in a second metal layer, wherein: the first coil of metal trace is laid out to be substantially symmetrical with respect to a first axis, the second coil of metal trace is laid out to be approximately a mirror image of the first coil of metal trace with respect to a second axis, and the third coil of metal trace is laid out to enclose a majority portion of both the first coil of metal trace and the second coil of metal trace from a top view perspective.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: December 31, 2019
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Poh-Boon Leong, Chia-Liang (Leon) Lin
  • Patent number: 10446326
    Abstract: The purpose of the present invention is to provide a component in which inductors and capacitors necessary for a low-pass filter and the like can be mounted at high density, and to in turn reduce the size of an electronic control unit in which the component is installed. The electronic control unit is characterized in that: the electronic control unit is provided with a laminated capacitor having built-in circuit patterns and dielectric bodies; the circuit patterns comprise a laminated plurality of coil effect generation patterns and inter-layer connection patterns for series connection of the plurality of coil effect generation patterns; and at least some of the plurality of coil effect generation patterns are used as electrodes for the laminated capacitor.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: October 15, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Hsinhan Shih
  • Patent number: 10348418
    Abstract: An improved filter for communications over a power bus may provide it to or minimize the effect of voltage spikes on a power line and/or may filter a power line signal with high pass and low pass filters to allow communicative signal reception on noisy power lines, and/or may filter a communicative signal transmitted from a radio modem with low pass filters to prevent high frequency harmonics and spurious signals from being conducted into and thereafter radiated from the power line.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: July 9, 2019
    Assignee: Esker Technologies, LLC
    Inventor: Brian S Olmstead
  • Patent number: 10340070
    Abstract: A multilayer common mode filter includes a first coil, a second coil and a third coil. The first coil includes a first coil conductor and a second coil conductor having spiral shapes and is configured by electrically connecting the first coil conductor and the second coil conductor. The second coil includes a third coil conductor and a fourth coil conductor having spiral shapes and is configured by electrically connecting the third coil conductor and the fourth coil conductor. The third coil includes a fifth coil conductor and a sixth coil conductor having spiral shapes and is configured by electrically connecting the fifth coil conductor and the sixth coil conductor. The first to sixth coil conductors are disposed in order of the first coil conductor, the third coil conductor, the fifth coil conductor, the second coil conductor, the fourth coil conductor, and the sixth coil conductor in a first direction.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: July 2, 2019
    Assignee: TDK CORPORATION
    Inventors: Takuo Abe, Makoto Yoshino
  • Patent number: 10320356
    Abstract: An LC composite electronic component includes a ceramic substrate that includes a magnetic layer, a thin-film insulator layer that is formed using a thin film process on a surface of the ceramic substrate, a coil-shaped inductor element that is formed in the ceramic substrate, a capacitor element that is formed in the thin-film insulator layer, and external terminals that are formed on a surface of the thin-film insulator layer. The capacitor element is located in the thin-film insulator layer and includes a first capacitor electrode, a second capacitor electrode and a thin-film dielectric body at least part of which is arranged between the first and second capacitor electrodes. The external terminals are each respectively connected to at least one out of the inductor element and the capacitor element.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: June 11, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hirokazu Yazaki, Toshiyuki Nakaiso
  • Patent number: 10270417
    Abstract: A converter filter includes an inductor having a main winding and a winding element, and first and second absorption circuits coupled to the inductor. The first and second absorption circuits are decoupled from one another by an inductance of the winding element of the inductor. An auxiliary winding is coupled to the inductor and forms a 1:1 transformer with the winding element. The auxiliary winding is fed via the inductance of the winding element. The auxiliary winding and the second absorption circuit are each connected to an output of the winding element and the first absorption circuit is connected to the auxiliary winding.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: April 23, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Silvio Höhne, Bernd Kürten
  • Patent number: 10116201
    Abstract: The present invention relates to a single phase, non-insulated, miniaturized DC/AC power inverter (1) having an output power density higher than 3000 W/dm3, wherein said first (S1_H), second (S1_L), third (S2_H) and fourth (S2_L) switches are made of wide-band semiconductors and preferably of gallium nitride or GaN semiconductors; and wherein said DC/AC power inverter (1) further comprises: a ripple-compensating active filter comprising a third half-bridge (203) having a fifth switch (S3_H) in series with a sixth switch (S3_L), said fifth switch (S3_H) being connected at one end to the positive terminal (L+) of the DC input, said sixth switch (S3_L) being connected at one end to the negative terminal (L?) of the DC input,the other end of the fifth switch (S3_H) being connected to the other end of the sixth switch (S3_L), defining a third common end, said third common end being connected to a first end of a LC filter, made of at least one inductor (L6) and one storage capacitor (C5), a second end of the LC fil
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: October 30, 2018
    Assignee: Constructions Electroniques + Télécommunications
    Inventors: Paul Bleus, Thierry Joannes, François Milstein, Pierre Stassain, Fabrice Frebel
  • Patent number: 10062523
    Abstract: A multilayer electronic component includes a ceramic body having stacked dielectric layers to form a first capacitor part and a second capacitor part, wherein the first capacitor has a constant capacitance, and the second capacitor part has a variable capacitance; a voltage control terminal formed on a lateral surface of the ceramic body; an input terminal disposed on another lateral surface of the ceramic body corresponding to the first capacitor part; and an output terminal disposed on the other lateral surface of the ceramic body corresponding to the second capacitor part separate from the input terminal.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: August 28, 2018
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: In Wha Jeong, Jae Suk Sung, Hugh Kim
  • Patent number: 10026544
    Abstract: The present invention discloses a common mode noise restrainer applicable to Ethernet, comprising: a circuit side configured to connect with an integrated circuit; a cable side configured to connect with a cable; a plurality of transformers set between the circuit side and the cable side; and a plurality of common mode chokes composed of a first part of the common mode chokes and a second part of the common mode chokes in which the first part of the common mode chokes is set between the circuit side and the plurality of transformers and the second part of the common mode chokes is set between the cable side and the plurality of transformers while the one or more transformer(s) connected with the first part of the common mode chokes are not identical to the one or more transformer(s) connected with the second part of the common mode chokes.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: July 17, 2018
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventor: Chien-Ming Wu
  • Patent number: 10026542
    Abstract: An inductive device including a first and second concentric winding wound around a center axis of the inductive device, where the second winding is placed outside of the first winding and provided in two separate parts a first upper part and a second lower part, wherein there is an opening between the first and second parts of the second winding and the first winding has a first winding connection that passes through said opening, the inductive device further including a concentric electric shielding element around the center axis and stretching all the way between the upper and the lower part of the second winding, the shielding element including a metal shield layer.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: July 17, 2018
    Assignee: ABB Schweiz AG
    Inventors: Kjell Walberg, Roger Eklund
  • Patent number: 9979375
    Abstract: A communication matching network for multi-harmonic suppression includes a communication circuit configured to provide a signal. The communication matching network further includes a matching circuit configured to receive the signal from the communication circuit and suppress one or more harmonics of the received signal to generate a filtered signal, wherein the matching circuit includes a transformer comprising a first winding and a second winding, wherein the first winding includes a first inductance and the second winding includes a second inductance and wherein the matching network includes a harmonic trap including a third inductance such that the third inductance is located inside or within a physical layout of the first winding and/or the second winding. The communication matching network further includes a receiver circuit configured to receive the filtered signal from the matching circuit for further processing.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: May 22, 2018
    Assignee: Intel IP Corporation
    Inventors: Stephan Leuschner, Jose Pedro Diogo Faisca Moreira
  • Patent number: 9923324
    Abstract: An AC Line Filter/Rectifier Module (ACLF/RM) has a metal housing and an outward appearance of a conventional AC line filter, but the ACLF/RM includes circuitry that performs both EMI filtering and line filtering as well as very efficient AC-to-DC rectification. Rectification circuitry within the ACLF/RM rectifies an AC voltage signal received onto AC input module terminals and outputs a rectified version of the AC voltage signal onto DC output module terminals. The rectification circuitry includes at least one low forward voltage rectifier, where the low forward voltage rectifier includes a bipolar transistor and a diode. Inductive components perform both EMI filtering and line filtering as well as current splitting required to drive the bipolar transistors of the low forward voltage rectifiers. Due to the use of the low forward voltage rectifiers, the AC-to-DC conversion is more efficient than would be case were a conventional diode bridge rectifier employed.
    Type: Grant
    Filed: January 31, 2015
    Date of Patent: March 20, 2018
    Assignee: IXYS Corporation
    Inventor: Kyoung Wook Seok
  • Patent number: 9912124
    Abstract: Described is a spark plug connector having an interference-suppression resistor which has a wire winding on a coil body. According to this disclosure, it is provided that the coil body carries an electrical resistor that contacts the wire winding and is connected in parallel thereto. In addition, an interference-suppression resistor for an ignition system of an internal combustion engine is described.
    Type: Grant
    Filed: July 26, 2015
    Date of Patent: March 6, 2018
    Assignee: BorgWarner Ludwigsburg GmbH
    Inventors: Eduard Tamas, Martin Sackmann, Manfred Adolf
  • Patent number: 9882541
    Abstract: An electronic component includes first through n-th inductors that turn around as viewed from a first direction perpendicular or substantially perpendicular to a stacking direction of a multilayer body of the electronic component. An (n+1)-th inductor includes a linear (n+1)-th inductor conductive layer which is provided in a configuration in which it turns around, as viewed from the stacking direction, and which is located within a region surrounded by the first inductor, as viewed from the first direction. An (n+1)-th capacitor is electrically connected to a first outer electrode, and includes an (n+1)-th capacitor conductive layer which opposes a first inductor conductive layer defining the first inductor with an insulating layer of a plurality of insulating layers of the multilayer body interposed therebetween.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: January 30, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kunihiro Watanabe
  • Patent number: 9875841
    Abstract: Phaseback DC choke includes a common core, a first coil formed about the common core, and a second coil formed about the common core in parallel opposing configuration relative the first coil. A DC circuit including a Phaseback DC choke is also provided.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: January 23, 2018
    Assignee: APPLIED ENERGY LLC
    Inventors: Daniel Princinsky, William Hinton
  • Patent number: 9866197
    Abstract: RF communications circuitry, which includes a first RF filter structure, is disclosed. The first RF filter structure includes a first tunable RF filter path and a second tunable RF filter path. The first tunable RF filter path includes a pair of weakly coupled resonators. Additionally, a first filter parameter of the first tunable RF filter path is tuned based on a first filter control signal. A first filter parameter of the second tunable RF filter path is tuned based on a second filter control signal.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: January 9, 2018
    Assignee: Qorvo US, Inc.
    Inventors: George Maxim, Dirk Robert Walter Leipold, Baker Scott
  • Patent number: 9853621
    Abstract: A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: December 26, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Stefan Andersson, Fenghao Mu, Johan Wernehag
  • Patent number: 9819323
    Abstract: The present disclosure relates to a circuit for suppressing unwanted magnetic interference. The circuit can have a transformer having a first coil, a first pair of input terminals, and a first pair of output terminals. The transformer can produce a first magnetic field. The circuit can also have a harmonic trap. The harmonic trap can have a second coil and a second pair of input terminals operably coupled to the first pair of input terminals. The harmonic trap can produce a second magnetic field opposing the first magnetic field. The harmonic trap can suppress electrical signals of at least one of the first input terminals and the first output terminals of the transformer at a resonant frequency of the harmonic trap. The harmonic trap can also suppress the first magnetic field in a far field.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: November 14, 2017
    Assignee: QUALCOMM Incorporated
    Inventor: Zaid Aboush
  • Patent number: 9774283
    Abstract: A motor driving circuit for driving a direct-current (DC) motor, includes a driving circuit for converting an input voltage into a first and a second output voltages, a Hall sensor for generating a first and a second time sequential control signals according to a working condition of the DC motor, a current sensing unit for comparing the motor current to a reference current to generate a comparison result, and a control unit coupled to the driving circuit, the current sensing unit and the Hall sensor for controlling a working status of the driving circuit according to the first and the second time sequential control signals and the comparison result.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: September 26, 2017
    Assignee: Anpec Electronics Corporation
    Inventors: Kun-Min Chen, Ching-Sheng Li, Ching-Shan Lu, Ming-Jung Tsai
  • Patent number: 9673772
    Abstract: A filter includes a multilayer body including a plurality of insulator layers stacked on top of one another. Outer electrodes are provided on surfaces of the multilayer body. A first resonator is connected to a first one of the outer electrodes and includes a first coil. A second resonator is connected to a second one of the outer electrodes and includes a second coil. A third resonator includes a third coil that is magnetically coupled with the first and second coils. The first and second coils are respectively defined by coil conductor layers provided on an insulator layer. The third coil is defined by via hole conductors that penetrate through the insulator layer in a z-axis direction.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: June 6, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hiroshi Masuda, Takahiro Mori
  • Patent number: 9641065
    Abstract: An AC line filter module includes AC-to-DC rectification circuitry. The rectification circuitry includes four low forward voltage rectifiers coupled together as two high-side rectifiers and two low-side rectifiers, where each low forward voltage rectifier includes an NPN bipolar transistor and a parallel-connected diode. A current splitting pair of inductors splits a return current so that a portion of the current is supplied to the collector of an NPN bipolar transistor that is on, and so that the remainder of the current is supplied to the base of the transistor that is on. Both low-side rectifiers are driven by these current splitting inductors. A pair of base current return diodes provides base current return paths. Due to the use of NPN bipolar transistors and no PNP bipolar transistors, manufacturing cost is reduced and efficiency is improved as compared to an implementation that uses low forward voltage rectifiers having PNP transistors.
    Type: Grant
    Filed: June 6, 2015
    Date of Patent: May 2, 2017
    Assignee: IXYS Corporation
    Inventor: Kyoung Wook Seok
  • Patent number: 9641147
    Abstract: Disclosed is a signal splitter that includes a coupled transmission line element coupled between two output ports of the signal splitter. The coupled transmission line element is used to lower the isolation between the two output ports for a particular frequency band. The coupled transmission line element includes a first and a second elongate electrical conductor. The first and the second elongate electrical conductor first ends are coupled to the signal transmission path that connects the two output ports. The first and the second elongate electrical conductor second ends are un-terminated. The first elongate electrical conductor and the second elongate electrical conductor are not shorted together, and the first elongate electrical conductor and the second elongate electrical conductor are electrostatically coupled, such as by twisting them together into a helix.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: May 2, 2017
    Assignee: PPC BROADBAND, INC.
    Inventors: Erdogan Alkan, Leon Marketos
  • Patent number: 9531073
    Abstract: An antenna device which includes a coil conductor and a booster conductor. The coil conductor is defined by wound loop-shaped conductors and includes a first opening at a winding center and two ends connected to a feeding circuit. The booster conductor includes a coupling conductor portion and a frame-shaped radiation conductor portion. The coupling conductor portion includes a second opening overlapped at least partially by the first opening, is split in a portion thereof by a slit, and is electromagnetically coupled to the coil conductor. The frame-shaped radiation conductor portion includes a third opening and is connected to the coupling conductor portion.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: December 27, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Shinichi Nakano, Noboru Kato
  • Patent number: 9511727
    Abstract: Provided are a power line communication system, a connector device, and a power line communication device that allow downsizing of a device for power line communication in a vehicle that performs power line communication with a feeding device via a charging cable. An electromagnetic induction type signal converter and a filter necessary for power line communication are provided in a connector device 3, and a power line communication section which performs power line communication with the electromagnetic induction type signal converter is provided in an ECU. A capacitor 16, a signal wire 17, and a capacitor 16 are connected in series between AC lines 11 and 12 extending from a tubular part 32 of the connector device 3.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: December 6, 2016
    Assignees: Sumitomo Electric Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Yousuke Takata, Takeshi Hagihara, Yutaka Komatsu, Hiroya Andoh, Yuta Ochiai, Nobuyuki Nakagawa, Yukihiro Miyashita
  • Patent number: 9379919
    Abstract: A transmission circuit including four transmission component sets for Ethernet is provided. Each transmission component set is coupled between an Ethernet connector and an Ethernet chip and has a protection component set. For each transmission component set, a first capacitor is coupled between first and second transmission lines (TLs), and coupled to the Ethernet connector via the first TL and to the Ethernet chip via the second TL; a second capacitor is coupled between third and fourth TLs, and coupled to the Ethernet connector via the third TL and to the Ethernet chip via the fourth TL; first and second inductors are cascaded and coupled between the first and third TLs; a third inductor is coupled between the second and fourth TLs; and a contact between the first and second inductors is coupled to a ground via a fifth TL.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: June 28, 2016
    Assignee: NLIGHTNING TECHNOLOGY LTD.
    Inventors: Kun Tsen Lin, Shih Peng Wu
  • Patent number: 9350317
    Abstract: The present invention discloses an EMI suppression device, comprising: a first transformer including a first circuit-end central tap to receive a first circuit signal from two first circuit-end signal taps, and a first cable-end central tap to receive a first cable signal from two first cable-end signal taps; a second transformer including a second circuit-end central tap to receive a second circuit signal from two second circuit-end signal taps, and a second cable-end central tap to receive a second cable signal from two second cable-end signal taps; a first circuit-end inductor coupled between the first circuit-end central tap and a system ground to reduce the common mode noise of the first circuit signal; and a second circuit-end inductor coupled between the second circuit-end central tap and the system ground to reduce the common mode noise of the second circuit signal. Said first and second circuit-end inductors operate separately.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: May 24, 2016
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Iat-In Ao-Ieong, Chen-Chih Huang
  • Patent number: 9350231
    Abstract: A power conversion apparatus is disclosed in the present application. The power conversion apparatus comprises: a power converter comprising an energy-storage magnetic component, and a filter comprising an inductor component and a two-port network connected the energy-storage magnetic component and the inductor component, wherein a series resonance is formed by the two-port network and a mutual inductance which is formed by a coupling between the energy-storage magnetic component and the inductor component.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: May 24, 2016
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Rui Wu, Yicong Xie, Min Zhou, Teng Liu
  • Patent number: 9203372
    Abstract: A common mode filter is provided with first and second spiral patterns provided on an insulating layer and connected to each other in series, and third and fourth spiral patterns provided on an insulating layer and connected to each other in series. The first and third spiral patterns overlap each other so as to be magnetically coupled with each other. The second and fourth spiral patterns overlap each other so as to be magnetically coupled with each other. Relationships between winding directions of the first and second spiral patterns and between winding directions of the third and fourth spiral patterns are set to cancel out magnetic fluxes of the couples of the spiral patterns each other, respectively. Each number of turns in the first and third spiral patterns is larger than each number of turns in the second and fourth spiral patterns respectively.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: December 1, 2015
    Assignee: TDK CORPORATION
    Inventors: Takeshi Okumura, Tomonaga Nishikawa, Takashi Nakagawa, Toshio Tomonari
  • Patent number: 9190978
    Abstract: A differential transmission circuit includes differential signal transmission and reception units connected by a differential signal wiring having an inductor unit composed of magnetically coupled first and second inductors provided on first and second signal lines, an input-side capacitor unit including a first input-side capacitor having one terminal connected to a first inductor signal input terminal and the other terminal grounded and a second input-side capacitor having one terminal connected to a second inductor signal input terminal and the other terminal grounded, and an output-side capacitor unit including a first output-side capacitor having one terminal connected to a first inductor signal output terminal and the other terminal grounded and a second output-side capacitor having one terminal connected to a second inductor signal output terminal and the other terminal grounded.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: November 17, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yasuhiro Takahashi
  • Publication number: 20150145618
    Abstract: A common mode filter in which at least one surface of all of external electrodes and ground electrodes are exposed to a first surface, at least one side of each of two of the external electrodes and at least one side of one of the ground electrodes contact a first side of the first surface, and at least one side of each of the external electrodes and the ground electrodes of which sides do not contact the first side contact a second side of the first surface, thereby making it possible to improve sticking strength and decrease a short-circuit phenomenon occurrence rate.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 28, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jeong Min CHO, Won Chul SIM, Hye Won BANG, Geon Se CHANG, Kwang Mo KIM
  • Publication number: 20150145616
    Abstract: A stack type common mode filter (CMF) for high frequency may improve high frequency characteristics, like removing an impedance difference between terminals by not overlapping terminal portions of multiple stack structures with upper and lower magnetic substances, and removing noise in a common mode and removing a signal distortion in a differential mode by removing an unnecessary parasitic impedance from terminal portions, and thus the stack type CMF for high frequency may be applicable at a high frequency compared to a conventional CMF.
    Type: Application
    Filed: February 27, 2014
    Publication date: May 28, 2015
    Applicants: JOINSET CO., LTD.
    Inventor: Sun-Ki KIM
  • Publication number: 20150109073
    Abstract: A connection device for connecting an electrical member to a communications line comprising at least two conductors for carrying differential signals. The connection device includes at least one data exchange interface component connected to the line to send and/or receive data, and a connection for connecting the electrical member to the line.
    Type: Application
    Filed: July 1, 2013
    Publication date: April 23, 2015
    Inventors: Francois Guillot, Jean-Marie Courteille, Maxime Goullier, Michel Nollet
  • Patent number: 9013900
    Abstract: A noise reduction unit includes a plurality of cores each having formed therein a through hole, a plurality of wires connected to a noise source and each wound around the corresponding core through the through hole, and a core supporting member that supports the plurality of cores. The core supporting member supports the plurality of cores in such a manner that the plurality of cores is disposed parallel to each other along a through direction of the through holes and spaced apart from each other with a predetermined gap in the through direction.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: April 21, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Koichi Kondo
  • Publication number: 20150070242
    Abstract: There are provided a transformer including inductors, and variable capacitors. Capacitance values of the variable capacitors are controlled by a control signal. One end of the first inductor is connected to a reference potential, the first variable capacitor is connected in series between the other end of the first inductor and a first terminal, the second variable capacitor is connected in series between one end of the second inductor and a second terminal, the third variable capacitor is connected in series between the other end of the second inductor and a third terminal. The capacitance values of the variable capacitors are changed by the control signal to obtain a desired pass phase, a loss is small, and both functions of a single-phase-differential conversion and a phase shifter are realized.
    Type: Application
    Filed: August 18, 2014
    Publication date: March 12, 2015
    Inventor: Shigeaki KAWAI
  • Publication number: 20150035620
    Abstract: An alternating current (AC) power device includes an AC circuit having input nodes, output nodes and a ground node. The AC circuit is configured to receive an input electrical signal at the input nodes and generate an output electrical signal at the output nodes. The AC power device also includes an inductor coupled to the ground node of the AC circuit. The ground node is configured to be coupled to a ground plane at a ground potential. The AC circuit is configured to be coupled to a load at the output nodes. The inductor is configured to be connected in series between the ground node of the AC circuit and the load to attenuate radio frequency components present at the ground node.
    Type: Application
    Filed: August 26, 2013
    Publication date: February 5, 2015
    Applicant: The Quest Group
    Inventor: Garth Judson POWELL
  • Publication number: 20150029766
    Abstract: An embodiment of the present invention is directed to an integrated electromagnetic compatibility (EMC) filter and power line communication (PLC) interface. The EMC filter and PLC interface comprises a first filter winding and a second filter winding configured as a common mode choke; and a two-part winding on the common mode choke, wherein the two-part winding comprises (i) a first winding coupled proximate the first filter winding and (ii) a second winding coupled proximate the second filter winding, wherein the first winding and the second winding have an equal number of turns, and wherein phasing of the first winding is reversed with respect to the second winding.
    Type: Application
    Filed: July 29, 2014
    Publication date: January 29, 2015
    Inventor: Michael Harrison
  • Patent number: 8928425
    Abstract: A circuit for a wireline system is disclosed. In an embodiment, the circuit includes a twisted pair channel. The twisted pair channel delivers a differential signal that includes a converter mode component. The circuit includes at least one transformer coupled to the twisted pair channel and a transceiver coupled to the at least one transformer. The circuit further includes a common mode detection coupled to the transceiver for detecting a common mode component. In an embodiment, the circuit detects the common mode component. Accordingly, with common mode component detection capability, the common mode component of the differential can be analyzed for characterization purposes as well as for potential improvement in the system performance signal.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: January 6, 2015
    Assignee: Aquantia Corp.
    Inventors: Hossein Sedarat, Paul Langner, Ramin Farjadrad, Ramin Shirani
  • Patent number: 8897379
    Abstract: A digital communication system comprising a host and a client, the host calls the client via two transmission lines. The host includes a processor, a first control unit, a second control unit, a high frequency transformer and an interface unit. The digital communication system utilizes the first control unit and the high frequency transformer to modulate outgoing signals. The digital communication system utilizes the second unit and the high frequency transformer to demodulate incoming signals.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: November 25, 2014
    Assignees: Fu Tai Hua Industry (Shenzhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Ren-Wen Huang, Yang Xin, Qiang You, Chong-Jin Ma, Tsung-Jen Chuang
  • Publication number: 20140340171
    Abstract: A GFCI Compatible System and Method for Reducing Common Mode Noise is described herein. Specifically the disclosure teaches a GFCI compatible system for reducing common mode noise (CMN). A CMN suppressor can comprise a hot line, neutral line and ground line. The first ends of the hot line, neutral line and ground line can be connected to a GFCI protected hot node, neutral node and ground node. The second ends of the hot line, neutral line and ground line can be connected to a common mode noise (CMN) sensitive device's hot line, neutral line, and ground line. The system can further comprise a toroidal coil inductor located on the ground line and a high pass filter connected between the neutral line and the ground line. The high pass filter can be located downstream from the toroidal coil inductor.
    Type: Application
    Filed: August 4, 2014
    Publication date: November 20, 2014
    Inventors: Bahram Mechanic, Tooraj Faridi
  • Patent number: 8866565
    Abstract: Systems and methods for an electric choke are provided. The choke may be provided as part of a power transmission arrangement that includes a cable for electrically coupling a power source and a powered device having a ground node and a wire separate from the cable providing a path for a common-mode current through the ground node. The power transmission arrangement also includes an unbalanced choke coupled between the power source and the powered device, wherein a number of turns of the cable in the choke is different than a number of turns of the wire in the choke.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: October 21, 2014
    Assignee: General Electric Company
    Inventors: Rixin Lai, Joseph Smolenski
  • Publication number: 20140306781
    Abstract: A magnetic interface circuit for interfacing between a cable side and a circuit side of a networking communication channel. The magnetic interface circuit includes a transformer and a 3-wire common mode choke (CMC). The transformer has a first winding connected to the cable side of the channel and a second winding connected to the circuit side of the channel. Each of the first and second windings has two output ports. The 3-wire CMC has a center winding and two outer windings respectively connected to the output ports of the first or second winding. The center winding has two opposite ends both used for connecting to ground.
    Type: Application
    Filed: April 11, 2014
    Publication date: October 16, 2014
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: JIE ZHANG
  • Publication number: 20140300433
    Abstract: A filter for filtering a three-phase electrical power waveform produces a three-phase output power waveform. The filter has an inductor with three sets of first and second coils, each having a capacitor connected in series therewith. Each of the three sets of first and second coils has a tap intermediate the first and second coils where the output waveform is present, each tap capable of being connected to a load. In some embodiments, the inductor is passive adaptive and includes resistors for reducing current in-rush.
    Type: Application
    Filed: April 9, 2014
    Publication date: October 9, 2014
    Inventors: Todd Shudarek, Joel Mertes
  • Publication number: 20140266506
    Abstract: A transformer filter arrangement (30) for passing signals at a fundamental frequency and suppressing signals at one or more interfering frequencies is disclosed. It comprises a transformer (100) having a first winding (110) and a second winding (120), wherein the first winding (110) has a first end (112a) and a second end (122b) and the second winding (120) has a first end (122a) and a second end (122b). It further comprises one or more capacitors (130a-e).
    Type: Application
    Filed: July 10, 2012
    Publication date: September 18, 2014
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Stefan Andersson, Fenghao Mu, Johan Wernehag
  • Patent number: 8836448
    Abstract: A noise filtering magnetic interface circuit used for an electrical connector is provided. The magnetic interface circuit includes a number of signal channels and a capacitor (40). Each channel has a transformer (10) and a 3-wire common mode choke (20). The transformer has a first winding (100) connected and a second winding (110), the first winding having two opposite outputs, the second winding having two outputs and a center tap (111). The 3-wire common mode choke has a center winding (220) and two outer windings (210, 230), the center winding having a first output connected to the center tap of the second winding and a second output opposite to the first output, the two outer windings being respectively connected to the two outputs of the second winding. The capacitor has a first pole connected to the second outputs of the center windings of the channels and an opposite second pole connected to a ground.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: September 16, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Jie Zhang, Yueh-Shan Shih