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公开(公告)号：US12106881B2
公开(公告)日：2024-10-01
申请号：US18028630
申请日：2021-09-21
发明人： Yoshifumi Akita
CPC分类号： H01F27/006 , H02M1/44 , H03H7/09 , H01F2017/0093
摘要： A noise filter includes a capacitor and a common mode choke coil. The noise filter is connected between a first power conversion device configured to perform a switching operation at a first frequency and a second power conversion device configured to perform a switching operation at a second frequency higher than the first frequency. The common mode choke coil includes a core, and a first winding wire and a second winding wire wound around the core. The common mode choke coil has an inductance which is set such that a resonant frequency of the noise filter when the core is magnetically saturated is higher than the first frequency and lower than the second frequency.
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公开(公告)号：US11811381B2
公开(公告)日：2023-11-07
申请号：US17356571
申请日：2021-06-24
CPC分类号： H03H7/0115 , H01F27/2804 , H01F27/29 , H01F27/40 , H01G4/012 , H01G4/30 , H03H7/09 , H01F2027/2809
摘要： First and second coils have winding axes in a laminated direction of base material layers and are magnetically coupled to each other. First and second capacitors are positioned in the laminated direction on layers different from layers on which the first and second coils are provided. The first and second coils are connected so that the winding directions of the first and second coils are opposite. The second capacitor is connected in parallel to a series circuit of the first coil and the second coil. The first capacitor is connected between a position where the first coil is connected to the second coil and a reference potential electrode. Mutual inductance caused by coupling between the first and second coils and the first capacitor provides a first attenuation pole and a parallel connection circuit of the series circuit and the second capacitor provides a second attenuation pole.
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公开(公告)号：US11664778B2
公开(公告)日：2023-05-30
申请号：US17902256
申请日：2022-09-02
申请人： TDK CORPORATION
CPC分类号： H03H7/42 , H03H7/0115 , H03H7/0161 , H03H7/09 , H03H2001/0085
摘要： A band-pass filter includes an unbalanced port, a first balanced port, a second balanced port, and first to third resonators provided between the unbalanced port and the first and second balanced ports. The second resonator and the third resonator each are a resonator with both ends open. The second resonator and the third resonator are adjacent to each other in a circuit configuration, and electromagnetically coupled by magnetic coupling as main coupling. The first resonator is provided closer to the second resonator than to the third resonator, and jump-coupled to the third resonator.
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公开(公告)号：US20230136361A1
公开(公告)日：2023-05-04
申请号：US18088674
申请日：2022-12-26
申请人： TDK Corporation
发明人： Yugo ASAI , Tsutomu KOBAYASHI , Daisuke URABE , Hiroshi SUZUKI , Emi ITO , Toshio TOMONARI
摘要： Disclosed herein is a common mode filter that includes a winding core part and first and second wires wound in a same direction around the winding core part. The first and second wires constitute a first winding block on one endmost side in an axial direction of the winding core part, a second winding block on other endmost side in the axial direction of the winding core part, and a third winding block positioned between the first and second winding blocks. The second winding block is a winding block at an odd-numbered position counted from the first winding block. The first and second wires cross each other in an area between the first and third winding blocks and in an area between the second and third winding blocks.
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公开(公告)号：US11575359B2
公开(公告)日：2023-02-07
申请号：US17302001
申请日：2021-04-21
摘要： A multi-port coupled inductor with interference suppression is provided with a first signal port connected to a first resistor port via a first inductor; a second resistor port connected to the first resistor port via a second inductor; a second signal port connected to the second resistor port via a third inductor; a third resistor port connected to the first resistor port via a first resistor; a fourth resistor port connected to the third resistor port via a fourth inductor and to the second resistor port via a second resistor; a third signal port connected to the third resistor port via a fifth inductor; and a fourth signal port connected to the fourth resistor port via a sixth inductor.
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公开(公告)号：US11545953B2
公开(公告)日：2023-01-03
申请号：US17371178
申请日：2021-07-09
发明人： Hisashi Akiyama
摘要： A matching circuit includes first and second ports, an autotransformer, and first and second capacitors. The autotransformer includes a first terminal coupled to a first port, a second terminal coupled to a second port, and a common terminal coupled to a reference potential, and includes a series parasitic inductor and a parallel parasitic inductor. The first capacitor is coupled in shunt to the second terminal, and defines a low pass filter together with the series parasitic inductor. The second capacitor is coupled in series between the first port and the first terminal, and defines a high pass filter together with the parallel parasitic inductor.
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公开(公告)号：US11495389B2
公开(公告)日：2022-11-08
申请号：US15930084
申请日：2020-05-12
申请人： Apple Inc.
摘要： Radio frequency filtering circuitry blocks certain frequencies in an outgoing signal so that the signal may be transmitted over a desired frequency. The radio frequency filtering circuitry includes a first inductor having a first coil and a second inductor coupled to and disposed within the first coil. The second inductor has a second coil and a third coil symmetrical to the second coil. When current is applied to the radio frequency filtering circuitry, the current in the second coil causes a first induced current in the first coil and the current in the third coil causes a second induced current in the first coil, wherein the second induced current is approximately equal in magnitude and opposite in direction to the first induced current. As such, the second induced current may compensate for the first induced current.
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公开(公告)号：US11362635B2
公开(公告)日：2022-06-14
申请号：US17109876
申请日：2020-12-02
发明人： Hidenori Kitazume
摘要： A filter includes an input terminal, an output terminal, a plurality sets of first capacitors that include first ends connected to a plurality sets of first nodes, respectively, at different locations in a path capable of transmitting a high frequency signal from the input terminal to the output terminal, and second ends commonly connected to a second node, a plurality sets of first inductors that include third ends connected to the first nodes, respectively, and the fourth ends commonly connected to a third node, a second inductor that includes a fifth end connected to the second node, and a sixth end grounded, and a third inductor that includes a seventh end connected to the third node, and an eighth end grounded.
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公开(公告)号：US11290078B2
公开(公告)日：2022-03-29
申请号：US17087657
申请日：2020-11-03
发明人： Satoshi Shigematsu
摘要： A filter element includes series inductors connected in series to a signal path, shunt inductors shunt-connected between the signal path and ground, and a capacitor connected in series to the shunt inductors. The shunt inductors include first and second shunt inductors connected in parallel to each other. Conductive patterns of the capacitor are overlapped with coil opening portions of the series inductors and the shunt inductors viewed from a lamination direction. The capacitor is sandwiched between the first shunt inductor and the second shunt inductor in the lamination direction of insulating layers and the conductive patterns.
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公开(公告)号：US20220006171A1
公开(公告)日：2022-01-06
申请号：US17358072
申请日：2021-06-25
申请人： NXP B.V.
摘要： A Wilkinson power combiner (202) is described that includes: at least one input port (210) coupled to at least one output port (212, 214, 216, 218) by at least two power combining stages. A first power combining stage (204) of the at least two power combining stages is configured as a single-stage first frequency pass circuit and a second power combining stage (206) of the at least two stages is configured as a single-stage second frequency pass circuit, and wherein the first frequency is different to the second frequency.
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