Two Windings (e.g., Transformer) Patents (Class 336/182)
  • Patent number: 10886057
    Abstract: An electronic component includes an element body, a conductor, and a plated electrode layer. The element body includes a first outer surface provided with a first recess. The conductor includes a first conductor portion. The first conductor portion is disposed in the first recess and includes a first face opposed to a bottom face of the first recess and a second face opposed to the first face. The plated electrode layer includes a first plating portion covering the second face. The second face includes a first slope inclined with respect to the first outer surface in such a way as to be recessed toward the bottom face side of the first recess from the first outer surface.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: January 5, 2021
    Assignee: TDK CORPORATION
    Inventors: Shunji Aoki, Yuya Ishima, Makoto Takahashi, Shougo Okamoto, Takafumi Takahashi, Hajime Kato, Yuto Shiga
  • Patent number: 10809326
    Abstract: A gate driver circuit is provided. The gate driver circuit includes an isolated gate driver power supply circuit. The isolated gate driver power supply circuit includes a coreless transformer and a resonance converter coupled to the coreless transformer. A method of manufacturing an isolated gate driver power supply circuit for a gate driver circuit is also provided.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: October 20, 2020
    Assignee: GE PRECISION HEALTHCARE LLC
    Inventors: Ruxi Wang, Krishna Mainali, Juan Antonio Sabate, Xiaohu Liu, Fengfeng Tao
  • Patent number: 10650957
    Abstract: Apparatus to form a transformer, an inductor, a capacitor or other passive electronic component, with patterned conductive features in a lamination structure, and one or more ferrite sheets or other magnetic core structures attached to the lamination structure via one or more inkjet printed magnetic adhesive layers that join the magnetic core structure or structures to the lamination structure.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: May 12, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yi Yan, Luu Thanh Nguyen, Ashok Prabhu, Anindya Poddar
  • Patent number: 10600566
    Abstract: A planar magnetic structure includes a closed loop structure having a plurality of core segments divided into at least two sets. A coil is formed about one or more core segments. A first antiferromagnetic layer is formed on a first set of core segments, and a second antiferromagnetic layer is formed on a second set of core segments. The first and second antiferromagnetic layers include different blocking temperatures and have an easy axis pinning a magnetic moment in two different directions, wherein when current flows through the coil, the magnetic moments rotate to form a closed magnetic loop in the closed loop structure.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: March 24, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Guohan Hu, Naigang Wang
  • Patent number: 10580561
    Abstract: An object is to improve a core and heat radiation properties from the coil, and to reduce the size of a transformer. In order to attain the object described above, a transformer includes a bobbin wound around with a coil, a columnar core center portion in which the bobbin is mounted, and a plurality of core leg portions joining both ends of the core center portion on the outside of the coil. The size of the core leg portion is larger than the size of the other core leg portions, and the core leg portion includes a flat outer circumferential surface approximately parallel to a surface which is tangent to an outer circumferential side surface of the coil. The transformer is disposed in a housing such that the outer circumferential surface of the core leg portion is tangent to a floor surface of the housing.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: March 3, 2020
    Assignee: HITACHI, LTD.
    Inventor: Hiroshi Hozoji
  • Patent number: 10529483
    Abstract: A resonant transformer with adjustable leakage inductance includes a secondary winding group, a primary winding group, a magnetic sheet and a core group. The primary winding group is provided on a bobbin of the secondary winding group, and the magnetic sheet is provided in the bobbin. The secondary winding group, the primary winding group and the magnetic sheet include a first through hole, a second through hole and a through hole, respectively. The core group includes a first core and a second core symmetrically disposed, which are disposed on top of and at the bottom of the primary winding group, respectively. During operation of the resonant transformer, the degree of coupling between the primary and secondary sides can be changed using the magnetic sheet. This allows the native leakage inductance to be altered to satisfy demands for various different resonant frequencies.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: January 7, 2020
    Assignee: Yujing Technology Co., Ltd.
    Inventor: Sen-Tai Yang
  • Patent number: 10504643
    Abstract: An electrical device includes a first flexible connector, including a first flexible conductor and a second flexible conductor, and a flexible insulator disposed between the first flexible conductor and the second flexible conductor, a second flexible connector spaced apart from the first flexible connector, the second flexible connector including a third flexible conductor, a first interconnect to electrically connect the first flexible conductor and the third flexible conductor, a second interconnect to electrically connect the third flexible conductor and the second flexible conductor, wherein the second interconnect is disposed opposite the first interconnect.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: December 10, 2019
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventors: Charles Patrick Shepard, Shin Katsumata
  • Patent number: 10403430
    Abstract: A reactor coil includes first and second coil elements each formed by edgewise and rectangular winding of one piece of rectangular wire rod in a manner in which the wound rectangular wire rod is stacked rectangularly and cylindrically and, at a winding terminating end point of the first coil element, the rectangular wire rod is bent approximately 90 degrees in a direction opposite to the winding direction of the first coil element so that the rectangular wire rod is stacked in a direction opposite to the stacking direction of the first coil element and is wound edgewisely and rectangularly in a direction opposite to the winding direction of the first coil element to form the second coil element and, as a result, the first coil element and second coil element are aligned in parallel to each other in a continuous state.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: September 3, 2019
    Assignees: TAMURA CORPORATION, TAMURA FA SYSTEM CORPORATION
    Inventors: Masatoshi Hasu, Kaoru Hattori, Ryo Nakatsu, Sei Urano, Kensuke Maeno
  • Patent number: 10186950
    Abstract: An inductor assembly is disclosed that includes a magnetic core with a center leg and a number n of phase legs, wherein n is an integer and n>1. Each phase leg is magnetically connected to the center leg by an upper bridge and a lower bridge to form a magnetic main loop, a midpoint of the phase leg being magnetically connected to a center point of the center leg by a shunt element including a gap. Each phase leg further includes an upper inductor coil disposed on an upper phase leg section located between the midpoint and the upper bridge and a lower inductor coil disposed on a lower phase leg section located between the midpoint and the lower bridge. Alternatively, the upper and lower inductor coils are disposed on respective upper and lower bridges.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: January 22, 2019
    Assignee: SMA Solar Technology AG
    Inventors: Henrik Wolf, Marek Rylko, Milosz Handzel, Marcin Kacki, Artur Mulawa, Piotr Otwinowski, Milosz Szarek
  • Patent number: 10024692
    Abstract: A transformer includes a bobbin, a primary coil, and a pair of secondary coils. The bobbin has an axial bore formed therein. The primary coil is wound on the bobbin and is adapted to be electrically excited with an excitation signal. The secondary coils are disposed adjacent to the primary coil, and are inductively coupled to the primary coil upon electrical excitation of the primary coil. The primary coil is wound on the bobbin such that at least a portion of the primary coil has a cross section shape that is a trapezoid.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: July 17, 2018
    Assignee: Honeywell International Inc.
    Inventors: Subramanian Esakki, Paresh Sanchihar, Vijayshekhar Araganji, Kumaran Sena Narasimhan
  • Patent number: 9755610
    Abstract: A transformer of the balanced-unbalanced type includes a primary inductive circuit and a secondary inductive circuit housed inside an additional inductive winding connected in parallel to the terminals of the secondary circuit and inductively coupled with the primary circuit and the secondary circuit.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: September 5, 2017
    Assignees: STMicroelectronics (Crolles 2) SAS, STMicroelectronics SA
    Inventors: Frederic Gianesello, Romain Pilard, Cedric Durand
  • Patent number: 9602065
    Abstract: In a semiconductor device, received signals of different frequency bands are input selectively to low noise amplifiers. A plurality of primary inductors are coupled between differential output nodes of the respective low noise amplifiers. A secondary inductor is provided commonly for the primary inductors, and magnetically coupled to the primary inductors. A demodulator converts a received signal transmitted from one of the primary inductors to the secondary inductor by electromagnetic induction, into a signal of a low frequency.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: March 21, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Masakazu Mizokami
  • Patent number: 9576717
    Abstract: A multi-layered printed circuit board, PCB, includes first windings for a first side of a planar magnetic transformer and second windings for a second side of the planar magnetic transformer. The PCB further includes conductive layers configured as the first windings, conductive layers configured as the second windings, and layers of an isolation material. Each layer of the isolation material is arranged between two conductive layers to provide electrical isolation between the two conductive layers. A group of two or more adjacent conductive layers are all conductive layers of the first windings and are all arranged between two conductive layers of the second windings. The thickness of the isolation material between the group of adjacent conductive layers of the first windings is less than the thickness of the isolation material between a conductive layer of the second windings and a conductive layer of the first windings.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: February 21, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Oscar Persson, Magnus Karlsson
  • Patent number: 9214273
    Abstract: A method provides a radial drop winding for an open wound transformer. A plurality of non-electrically conductive posts are arranged to define an interior space. Each post is of generally L-shape having a main body and a leg extending from a bottom end of the main body. During an open winding process, conductive wire is dropped to build up lengthwise along the posts to define at least one generally cylindrical winding segment supported by the legs of the posts.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: December 15, 2015
    Assignee: ABB Technology AG
    Inventors: Robert C. Ballard, Josiah Levi Vandervelde, William Edward Pauley, Jr., Joseph Leo Tedesco
  • Patent number: 9214265
    Abstract: A single- or multi-phase dry-type transformer includes at least two coils. A barrier between phases made of an electrically insulating material is arranged in the intermediate space between the individual coils.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: December 15, 2015
    Assignee: ABB TECHNOLOGY AG
    Inventors: Benjamin Weber, Bhavesh Patel, Burak Esenlik, Frank Cornelius, Marcos Bockholt, Jens Tepper, Rafael Murillo, Carlos Roy
  • Patent number: 9013261
    Abstract: The present disclosure provides a high-power variable inductor and a filter employing the same. A provided variable inductor comprises a first inductor and a second inductor. The first inductor is connected to a first input terminal and to a first output terminal of a two-port circuit. The second inductor is connected to a second input terminal and to a second output terminal of the two-port circuit. The first inductor and the second inductor are symmetrical to each other and jointly surround an adjustable area for varying an inductance of the variable inductor.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: April 21, 2015
    Assignee: PSTEK Co., Ltd.
    Inventor: Jae Taek Lee
  • Patent number: 8994487
    Abstract: A transformer includes a bobbin, at least one primary winding coil, at least one secondary winding coil, and a magnetic core assembly. The bobbin includes a main body, plural extension structures, and plural pin groups. The main body includes a channel, plural winding sections, a first connecting seat, and a second connecting seat. The plural extension structures are connected with the first connecting seat and the second connecting seat, respectively. In addition, each of the plural extension structures has a notch and a stepped structure, and the stepped structure comprises plural stepped parts. Each of the primary winding coil and the secondary winding coil includes plural outlet terminals. The plural outlet terminals of the secondary winding coil are respectively disposed on the plural stepped parts of the stepped structure and fixed on the pin group which is disposed on one of the extension structures.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 31, 2015
    Assignee: Delta Electronics, Inc.
    Inventors: Han-Hsing Lin, Hsiang-Yi Tseng, Ching-Hsiang Tien, Hsin-Wei Tsai, Yi-Lin Chen, Chun-Ping Chen
  • Patent number: 8988161
    Abstract: Various embodiments may provide a monolithic transformer for a radio frequency (RF) power amplifier module, such as a microwave frequency power amplifier module. The transformer may include a plurality of pairs of edge-coupled transmission lines, with individual pairs including first and second edge-coupled transmission lines. The first transmission lines may include first ends coupled with one another and second ends coupled with an input terminal of the transformer. The second transmission lines may include first ends coupled with the input terminal and second ends coupled with an output terminal of the transformer. The transformer may pass a communication signal from the input terminal to the output terminal, and provide a first impedance at the input terminal and a second impedance at the output terminal. The second impedance may be higher than the first impedance (e.g., by a factor of four).
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: March 24, 2015
    Assignee: TriQuint Semiconductor, Inc.
    Inventor: Charles F. Campbell
  • Patent number: 8963672
    Abstract: This wiring board is provided with an insulating core substrate, a first conductor pattern, a second conductor pattern, and a conductive material. The first conductor pattern and the second conductor pattern are adhered to the insulating core substrate. The second conductor pattern has a first surface and a second surface. The second conductor pattern has a concavity and a through-hole. The opening of the concavity that opens to the first surface and the opening of the through hole that opens to the first surface are interconnected to each other. The first conductor pattern is positioned at the opening of the concavity. The first conductor pattern and the second conductor pattern are electrically connected by means of the conductive material, which fills from the opening of the through hole that opens to the second surface.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: February 24, 2015
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Hiroaki Asano, Yasuhiro Koike, Kiminori Ozaki, Hitoshi Shimadu, Tetsuya Furuta, Masao Miyake, Takahiro Hayakawa, Tomoaki Asai, Ryou Yamauchi
  • Patent number: 8963671
    Abstract: A semiconductor transformer includes a first coil inductor and a second coil inductor. The first coil inductor has a first port, a second port and a first coil inductor wall, the first coil inductor wall having a height substantially equal to a thickness of the substrate. The second coil inductor has a third port, a first extension wall connected to the third port, a fourth port, a second extension wall connected to the fourth port and a second coil inductor wall.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: February 24, 2015
    Assignee: Advanced Semiconductor Engineering, Inc.
    Inventors: Chi-Han Chen, Pao-Nan Lee, Chi Tsung Chiu, Chien Hua Chen
  • Patent number: 8928443
    Abstract: An electrical device includes a winding, a primary cooling system, a secondary cooling system, and an actuator. The winding includes an interior portion and an exterior surface. The primary cooling system cools the exterior surface of the winding. The secondary cooling system cools the interior portion of the winding. The actuator is configured to actuate the secondary cooling system in response to a sensed condition of the electrical device or a predicted condition of the electrical device.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: January 6, 2015
    Assignee: Elwha LLC
    Inventors: Roderick A. Hyde, Jordin T. Kare, Lowell L. Wood, Jr.
  • Patent number: 8928449
    Abstract: An inductive element including a magnetic core with a section received in a central opening defined in each of the layers in a multilayer circuit board. A primary winding, an auxiliary winding, and a secondary winding are each realized in conductive coils located on a plurality of layers in the circuit board. The secondary winding is separated from the other windings by a relatively-thick dielectric layer. Other dielectric layers separate each of the layers with the coils. EMI shields are provided on other layers. The coils are located in a central region of each layer so as to provide an adequate safety margin from the side edges of the inductive element.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: January 6, 2015
    Assignee: Flextronics AP, LLC
    Inventors: Arturo Silva, Neil Gayle
  • Patent number: 8922322
    Abstract: A combined structure of hollow bobbin and conductive sheet for a transformer includes a hollow bobbin and at least one conductive sheet. The hollow bobbin includes an outer surface and at least one positioning structure formed on the outer surface. The conductive sheet is fit on the outer surface of the hollow bobbin and includes a main body and at least one engaging structure. The main body has a hollow portion, making the main body to have an inner circumference. The engaging structure is formed on the inner circumference of the main body and is engaged with the positioning structure of the hollow bobbin. The transformer includes at least one winding disposed on the outer surface of the hollow bobbin and abutting against the conductive sheet.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: December 30, 2014
    Assignee: Delta Electronics, Inc.
    Inventors: Hua-Sheng Lin, Yi-Fan Wu, Yu-Chieh Li, Zhi-Liang Zhang, Ching-Hsien Teng, Yu-Liang Hung
  • Patent number: 8896404
    Abstract: There are provided a coil component and a method of manufacturing the same. The coil component includes a core; at least one bobbin coupled to the core and having a coil wound therearound; and a base having the core seated therein and including an external connection terminal, wherein one side of the core is seated in the bobbin and the other side thereof is exposed to the outside of the base.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: November 25, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Sun Won, Deuk Hoon Kim, Geun Young Park, Young Min Lee, Dae Young Hwang, Jong Hae Kim, Myeong Jeong Kim, Jeong Myeon Kim
  • Patent number: 8866580
    Abstract: A power converting apparatus makes reduction of power loss possible and operates in a two-phase mode. A power converting apparatus of the inventive concept includes I-shaped block cores, each being made of a magnetic material; and E-shaped cores, each being produced by combining two L-shaped magnetic materials to each of the I-shaped cores. In each of the E-shaped cores, the block core is defined as a central leg, the other two legs are defined as a first outside leg and a second outside leg, respectively, and a closed magnetic path is configured by two E-shaped cores combined such that one of respective central legs in the two E-shaped cores, one of respective first outside legs therein, and one of respective second outside legs therein are caused to face the other of the central legs, the other of the first outside legs, and the other of the second outside legs.
    Type: Grant
    Filed: May 12, 2012
    Date of Patent: October 21, 2014
    Assignees: Shinto Holdings Co., Ltd., Nikkindenji Kogyo Co., Ltd.
    Inventors: Yuichi Hasegawa, Hiromune Ishii, Yuki Satake, Takeshi Kawahara
  • Patent number: 8854172
    Abstract: An inductor and a transformer, each of which includes a first bobbin on which a first coil is wound and a second bobbin on which a second coil is wound, are provided. The first bobbin includes a first bobbin part on which the first coil is wound and a first support part provided at one end of the first bobbin part. The second bobbin includes a second bobbin part on which the second coil is wound and a second support part provided at one end of the second bobbin part. Another end of the first bobbin part is coupled to the second support part and another end of the second bobbin part is coupled to the first support part.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: October 7, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young Deok Choi, Sun Mi Jung, Tae Sung Kim, Hyo Soon Choi
  • Patent number: 8854171
    Abstract: Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of a dual wound coil. The coil ends of a dual wound coil can be on a common side, simplifying wiring. The dual wound coil may be configured with a low resistance, reducing resistive losses.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: October 7, 2014
    Assignee: Electric Torque Machines Inc.
    Inventor: Thomas F. Janecek
  • Patent number: 8848397
    Abstract: A magnetic integration double-ended converter with an integrated function of a transformer and an inductor includes an integrated magnetic member having a magnetic core with three magnetic columns having at least three windings (NP, NS1, NS2) and at least one energy storage air gap, where a primary winding (NP) and a first secondary winding (NS1) are both wound around a first magnetic column or are both wound around a second magnetic column and a third magnetic column, and a second secondary winding (NS2) is wound around the second magnetic column; an inverter circuit with double ends symmetrically working, acting on the primary winding (NP); and a group of synchronous rectifiers (SR1, SR2), gate electrode driving signals of which and gate electrode driving signals of a group of power switch diodes (S1, S2) of the inverter circuit with the double ends symmetrically working complement each other.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: September 30, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zengyi Lu, Yongfa Zhu, Yadong Bai, Wei Chen, Zhaoguo Jin
  • Patent number: 8823480
    Abstract: A planar electronic device includes a planar substrate having a cavity configured to receive a ferrite material body therein. The planar substrate has an upper side and a lower side and conductive vias extending through the substrate. Top conductors are provided on the upper side of the planar substrate and are electrically connected to corresponding conductive vias. Bottom conductors are provided on the lower side of the planar substrate and are electrically connected to corresponding conductive vias. The bottom conductors, top conductors and conductive vias define a primary conductive loop and a secondary conductive loop. An upper cover layer covers the upper side and has a high permittivity. The upper cover layer is positioned relative to the top conductors to increase capacitance between the primary and secondary loops.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: September 2, 2014
    Assignee: Tyco Electronics Corporation
    Inventors: Sidharth Dalmia, Mark Patrick McGrath, Sun Zhuowen
  • Publication number: 20140232501
    Abstract: A common mode choke coil includes a primary coil and a secondary coil, wherein the primary coil includes a first coil pattern and a second coil pattern connected in series to the first coil pattern, and the secondary coil includes a third coil pattern and a fourth coil pattern connected in series to the third coil pattern. The first and third coil patterns are concentrically wound, as parallel or substantially parallel lines, in loop shapes on one surface, and the second and fourth coil patterns are concentrically wound, as parallel or substantially parallel lines, in loop shapes on the one surface with being adjacent to the first and third coil patterns.
    Type: Application
    Filed: May 1, 2014
    Publication date: August 21, 2014
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Noboru KATO
  • Patent number: 8803648
    Abstract: This disclosure provides implementations of inductors, transformers, and related processes. In one aspect, a device includes a substrate having first and second surfaces. A first inducting arrangement includes a first set of vias, a second set of vias, a first set of traces arranged over the first surface connecting the first and second vias, and a second set of traces arranged over the second surface connecting the first and second vias. A second inducting arrangement is inductively-coupled and interleaved with the first inducting arrangement and includes a third set of vias, a fourth set of vias, a third set of traces arranged over the first surface connecting the third and fourth vias, and a fourth set of traces arranged over the second surface connecting the third and fourth vias. One or more sets of dielectric layers insulate portions of the traces from one another.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: August 12, 2014
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Chi Shun Lo, Jonghae Kim, Chengjie Zuo, Changhan Hobie Yun
  • Patent number: 8791786
    Abstract: A coil device 10 comprises a first bobbin 40 having a first bobbin plate 42 provided with a first hollow cylinder 44 on which a primary coil 20 is wound at the outer periphery, and a second bobbin 50 mounted on the first bobbin 40 and having a second bobbin plate 52 provided with a second hollow cylinder 54 on which a secondary coil 30 is wound at the outer periphery. A winding center C1 of the primary coil 20 and a winding center C2 of the secondary coil 30 displace with a predetermined displacement (Lx) along a predetermined reference direction X.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: July 29, 2014
    Assignees: TDK Corporation, TDK Korea Corporation
    Inventors: Hiroshi Maeda, Terumasa Toyoda, Kiho Hwang, Sukho Shin
  • Patent number: 8786381
    Abstract: In one embodiment, the present invention includes a transformer formed on a semiconductor die. Such transformer may have multiple coils, including first and second coils. Each coil may have segments that in turn are formed on a corresponding metal layer of the semiconductor die. The segments of a given coil are coupled to each other, and the first and second coils can be interdigitated with each other.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: July 22, 2014
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Eric Kimball
  • Patent number: 8786393
    Abstract: A system and method for manufacturing of a micro-transformer providing direct electrical isolation between a primary winding and a secondary winding while featuring tight magnetic coupling for a large possible step-up or step-down ratio. The micro-transformer may be implemented in an integrated circuit, and may include a magnetic core. A high stepping ratio, e.g. approximately 50 to 100, may be achieved by connecting multiple symmetric primary windings in parallel and multiple symmetric secondary windings in series, or vice-versa. A plurality of windings may be stacked vertically. The micro-transformer may be of particular utility in wireless sensor networks, thermal and vibrational energy harvesters, power converters, and signal isolators.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: July 22, 2014
    Assignee: Analog Devices, Inc.
    Inventor: Baoxing Chen
  • Patent number: 8779882
    Abstract: A cost effective solution for construction of high frequency, double ended, isolated, push pull, center tapped power transformers operating in continuous/discontinuous mode with minimized winding proximity losses comprises at least two identical sets of windings with identical coupling coefficients. Each set of windings consists of at least one primary winding and at least one secondary winding tightly coupled to each other. Both the sets of windings are loosely coupled to each other with a magnetic field isolating separator.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: July 15, 2014
    Assignee: Astec International Limited
    Inventor: Vijay G. Phadke
  • Patent number: 8754738
    Abstract: A transformer having a high degree of coupling is connected between, for example, an antenna element and a power feed circuit. The transformer having a high degree of coupling includes a first inductance element connected to the power feed circuit and a second inductance element coupled to the first inductance element. A first end of the first inductance element is connected to the power feed circuit and a second end of the first inductance element is connected to the antenna element. A first end of the second inductance element is connected to the antenna element and a second end of the second inductance element is grounded.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: June 17, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Noboru Kato, Kenichi Ishizuka
  • Patent number: 8749337
    Abstract: A method for manufacturing a conductive coil, the method comprising using a semiconductor fabrication process (e.g. TSV) to manufacture a coil, typically a planar spiral conductive coil.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: June 10, 2014
    Assignee: Maradin Technologies Ltd.
    Inventors: Adi Baram, Matan Naftali, Sharon Hornstein, Inbal Herer, Menashe Yehiel
  • Publication number: 20140152412
    Abstract: The present disclosure provides a high-power variable inductor and a filter employing the same. A provided variable inductor comprises a first inductor and a second inductor. The first inductor is connected to a first input terminal and to a first output terminal of a two-port circuit. The second inductor is connected to a second input terminal and to a second output terminal of the two-port circuit. The first inductor and the second inductor are symmetrical to each other and jointly surround an adjustable area for varying an inductance of the variable inductor.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 5, 2014
    Applicant: PSTEK Co., Ltd.
    Inventor: Jae Taek LEE
  • Patent number: 8730000
    Abstract: Divided cores 11, 12 includes left and right leg portions and a yoke portion and formed by molding a yoke portion side core material within resin. The leg portions of the divided core are formed by tubular core mounting portions 41, 42. I-shaped leg portion side core materials 51-53 and spacers 6 are mounted in the tubular core mounting portions. A ring-shaped molded core 1 is formed by abutting and integrating the respective leg portions of two divided cores, and a coil 100 is wound around the molded core.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: May 20, 2014
    Assignee: Tamura Corporation
    Inventors: Kotaro Suzuki, Kensuke Maeno, Ryo Nakatsu
  • Publication number: 20140104025
    Abstract: A high frequency transformer with high conversion efficiency is provided. The high frequency transformer includes a first coil assembly 1 formed from a single flat wire, with first coils 1A that are configured by winding the flat wire edgewise plural times and that are formed at specific intervals, and a second coil assembly 2 formed from a single flat wire, with second coils 2A that are configured by winding the flat wire edgewise plural times and that are formed at specific intervals.
    Type: Application
    Filed: May 16, 2012
    Publication date: April 17, 2014
    Applicant: SEIDEN MFG. CO., LTD.
    Inventors: Tsunehiko Honna, Minoru Ishikawa
  • Patent number: 8665052
    Abstract: A transformer-based circuit has at least a first port and a plurality of second ports. The transformer-based circuit includes a first winding conductor and a plurality of second winding conductors. The first winding conductor is electrically connected to the first port, and has a plurality of sectors connected in series to thereby form a plurality of loops, where the loops are arranged in a concentric-like fashion. The second winding conductors are magnetically coupled to the first winding conductor; besides, the second winding conductors are electrically connected to the second ports, respectively. Overall layout patterns of the second winding conductors are identical to each other. The first winding conductor acts as one of a primary winding conductor and a secondary winding conductor, and each of the second winding conductors acts as the other of the primary winding conductor and the secondary winding conductor.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: March 4, 2014
    Assignee: Mediatek Inc.
    Inventor: Jie-Wei Lai
  • Patent number: 8648684
    Abstract: A voltage transforming apparatus includes a primary winding receiving an AC voltage, a plurality of secondary windings that are different in number of turns, and a voltage conversion circuit for converting an AC voltage induced in each of the plurality of secondary windings. Each of the plurality of secondary windings includes the first terminal and the second terminal each having a potential that is not fixed. The first terminal and the second terminal are separately provided in each of the secondary windings. The voltage transforming apparatus further includes a switching circuit for selectively connecting the first terminal and the second terminal of each of the plurality of secondary windings to the voltage conversion circuit.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: February 11, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshihiro Noda, Katsumi Konii
  • Patent number: 8643460
    Abstract: A transformer structure includes a bobbin, a conductive base, a first winding coil, plural second winding coils, and a magnetic core assembly. The bobbin includes a main body and a channel. The main body has a first winding section and plural first pins. The plural first pins are located at bilateral sides of the main body. The channel runs through the main body. The conductive base is disposed on a bottom side of the bobbin, and includes at least one connecting part. Through the connecting part of the conductive base, at least a portion of the plural first pins are electrically connected with each other. The first winding coil is wound around the first winding section. The second winding coils are connected with corresponding first pins. The magnetic core assembly is partially embedded into the channel of the bobbin.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: February 4, 2014
    Assignee: Delta Electronics, Inc.
    Inventors: Hsiang-Yi Tseng, Hsin-Wei Tsai, Ching-Hsiang Tien, Han-Hsing Lin, Yi-Lin Chen
  • Patent number: 8633793
    Abstract: The common mode filter of the instant disclosure includes a non-magnetic insulating substrate, a stacked-layer structure, an insulating layer, and a magnetic layer. The stacked-layer structure is arranged on the non-magnetic insulating substrate. The magnetic layer is covered on the stacked-layer structure by the insulating layer arranged therebetween. The stacked-layer structure comprises a first coil and second coil, wherein the first coil is coupled to the second coil to suppress the common mode noise. Specially, a width W (mm) and a length L (mm) of at least one coil in the first and second coils satisfy the relational expression of: [(14.1?fc)/6.5]2<L/W<[(16.7?fc)/4.5]2 Where fc (MHz) is the cutoff frequency of a differential-mode signal.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: January 21, 2014
    Assignee: Inpaq Technology Co., Ltd.
    Inventors: Yu-Chia Chang, Ming-Fung Hsieh, Chi-Wei Chen
  • Patent number: 8576038
    Abstract: The invention relates to a step switch provided with a preselector and a polarity circuit, a separate polarization resistance being respectively provided at the beginning and the end of the stepped winding. Optionally, the two polarization resistances can be connected continuously or via separate polarity switches.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: November 5, 2013
    Assignee: Maschinenfabrik Reinhausen GmbH
    Inventors: Axel Kraemer, Dazhong Shen
  • Patent number: 8564396
    Abstract: A laminar transformer having double-face secondary winding includes a primary winding part and a secondary winding part. The primary winding part further includes an isolating body seat and a plurality of coil sets. The secondary winding part further includes two plate-body set, each being positioned in the containing channel has a plurality of plate bodies and a plurality of insulating bodies. Each of the plate bodies has an opening for containing the central column and a guided channel that being positioned on a side of the opening has on both side thereof a pole lead respectively. The insulating bodies being a ring-shaped structure and being positioned in-between the plate bodies has a through hole for containing the central column. The plurality of plate bodies are laminated alternately and positioned in the central column making each of the plate-body sets form the one with four pole leads.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: October 22, 2013
    Assignee: Yujing Technology Co., Ltd
    Inventor: Cheng-Yu Pan
  • Patent number: 8559186
    Abstract: An inductor with patterned ground plane is described. In one design, the inductor includes a conductor formed on a first layer and a patterned ground plane formed on a second layer under the conductor. The patterned ground plane has an open center area and a shape matching the shape of the conductor. The patterned ground plane includes multiple shields, e.g., eight shields for eight sides of an octagonal shape conductor. Each shield has multiple slots formed perpendicular to the conductor. Partitioning the patterned ground plane into separate shields and forming slots on each shield help prevent the flow of eddy current on the patterned ground plane, which may improve the Q of the inductor. Multiple interconnects couple the multiple shields to circuit ground, which may be located at the center of the conductor.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: October 15, 2013
    Assignee: QUALCOMM, Incorporated
    Inventor: Zhang Jin
  • Patent number: 8558651
    Abstract: A core fixing member including: a core fixing part that has a plate-like shape and is to be fixed to a core; a case fixing part that has a plate-like shape and is to be fixed to a case; and at least one an arm part connecting the case fixing part with the core fixing part, and wherein the core fixing part and the case fixing part are arranged in a same plane, and the at least one arm part is formed in a shape of a letter ā€˜Uā€™, and one end of the at least one arm part is connected to the core fixing part and the other end of the at least one arm part is connected to the case fixing part.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: October 15, 2013
    Assignee: Tamura Corporation
    Inventor: Kotaro Suzuki
  • Patent number: 8552828
    Abstract: In accordance with an embodiment, a transformer includes a first coil disposed in a first conductive layer on a first side of a first dielectric layer, and a second coil disposed in a second conductive layer on a second side of the first dielectric layer. Each coil has a first end disposed inside its respective coil and a second end disposed at an outer perimeter of its respective coil. A first crossover disposed in the second conductive layer is directly connected to the first end of the first coil and extends past the outer perimeter of the first coil. In addition, a second crossover disposed in the first conductive layer is directly connected to the first end of the second coil and extends past the outer perimeter of the second coil.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: October 8, 2013
    Assignee: Infineon Technologies AG
    Inventors: Gottfried Beer, Urs Elrod, Christiane Brunner, Thomas Kilger
  • Patent number: 8531261
    Abstract: Method for improving the symmetry of the differential output signals of an integrated transformer of the symmetric-asymmetric type comprising an inductive primary circuit and an inductive secondary circuit, characterized in that the capacitive coupling between the primary and secondary circuits is reduced.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: September 10, 2013
    Assignee: STMicroelectronics, S.A.
    Inventors: Denis Pache, Nejdat Demirel