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公开(公告)号：US11558014B2
公开(公告)日：2023-01-17
申请号：US17323505
申请日：2021-05-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Satoshi Arayashiki , Satoshi Goto , Yusuke Tanaka
Abstract: A power amplifier circuit includes a first transistor having an emitter electrically connected to a common potential, a base to which a first high-frequency signal is input, and a collector from which a third high-frequency signal is output; a second transistor having an emitter electrically connected to the common potential, a base to which a second high-frequency signal is input, and a collector from which a fourth high-frequency signal is output; a first capacitance circuit electrically connected between the collector of the second transistor and the base of the first transistor; and a second capacitance circuit electrically connected between the collector of the first transistor and the base of the second transistor.
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公开(公告)号：US11545944B2
公开(公告)日：2023-01-03
申请号：US17151922
申请日：2021-01-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jun Enomoto , Kazuo Watanabe , Satoshi Tanaka , Yusuke Tanaka , Makoto Ito
Abstract: A power amplifier circuit includes a power amplifier including a first transistor having a first terminal connected to a reference potential, a second terminal to which a first current and a radio-frequency signal are input, and a third terminal connected to a first power supply potential via a first inductor; a capacitor connected to the third terminal of the first transistor; a second transistor including a first terminal connected to the capacitor and the reference potential via a second inductor, a second terminal to which a second current is input and is connected to the reference potential, and a third terminal connected to the first power supply potential via a third inductor and outputs signal; and an adjustment circuit that outputs a third current corresponding to the first power supply potential or a second power supply potential to the second terminal of the second transistor.
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公开(公告)号：US11043918B2
公开(公告)日：2021-06-22
申请号：US16589369
申请日：2019-10-01
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Satoshi Arayashiki , Satoshi Goto , Yusuke Tanaka
Abstract: A power amplifier circuit includes a first transistor having an emitter electrically connected to a common potential, a base to which a first high-frequency signal is input, and a collector from which a third high-frequency signal is output; a second transistor having an emitter electrically connected to the common potential, a base to which a second high-frequency signal is input, and a collector from which a fourth high-frequency signal is output; a first capacitance circuit electrically connected between the collector of the second transistor and the base of the first transistor; and a second capacitance circuit electrically connected between the collector of the first transistor and the base of the second transistor.
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公开(公告)号：US20200076384A1
公开(公告)日：2020-03-05
申请号：US16549057
申请日：2019-08-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Kazuo Watanabe , Yusuke Tanaka , Satoshi Arayashiki
Abstract: A power amplifier circuit includes a lower transistor having a first terminal, a second terminal connected to ground, and a third terminal, wherein a first power supply voltage is supplied to the first terminal, and an input signal is supplied to the third terminal; a first capacitor; an upper transistor having a first terminal, a second terminal connected to the first terminal of the lower transistor via the first capacitor, and a third terminal, wherein a second power supply voltage is supplied to the first terminal, an amplified signal is outputted to an output terminal from the first terminal, and a driving voltage is supplied to the third terminal; a first inductor that connects the second terminal of the upper transistor to ground; a voltage regulator circuit; and at least one termination circuit that short-circuits an even-order harmonic or odd-order harmonic of the amplified signal to ground potential.
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公开(公告)号：US12273079B2
公开(公告)日：2025-04-08
申请号：US17805259
申请日：2022-06-03
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Kenji Tahara , Kenichi Shimamoto , Yusuke Tanaka
Abstract: Increase in power-added efficiency can be achieved. A second base of a second transistor is connected to a first collector of a first transistor. A third base of a third transistor is connected to the first collector of the first transistor, and a third collector of the third transistor is connected to a second collector of the second transistor. A second bias circuit includes a fifth transistor connected to the second base of the second transistor. A third bias circuit includes a sixth transistor connected to the third base of the third transistor. A first current limiting circuit includes a seventh transistor, a first collector resistor, and a first base resistor. A second current limiting circuit includes an eighth transistor, a second collector resistor, and a second base resistor.
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Patent Agency Ranking
公开(公告)号：US11916529B2
公开(公告)日：2024-02-27
申请号：US15730128
申请日：2017-10-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yusuke Tanaka , Hiroki Shounai
IPC: H03H7/38
CPC classification number: H03H7/38
Abstract: A matching circuit performs output impedance matching for an amplifier that amplifies an input signal and outputs an amplified signal. The matching circuit includes a low pass filter and a high pass filter. The ground of the low pass filter and the ground of the high pass filter are isolated from each other.
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公开(公告)号：US11757411B2
公开(公告)日：2023-09-12
申请号：US18147849
申请日：2022-12-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Satoshi Arayashiki , Satoshi Goto , Yusuke Tanaka
CPC classification number: H03F1/0216 , H03F3/21 , H03F2200/451 , H04W88/02
Abstract: A power amplifier circuit includes a first transistor having an emitter electrically connected to a common potential, a base to which a first high-frequency signal is input, and a collector from which a third high-frequency signal is output; a second transistor having an emitter electrically connected to the common potential, a base to which a second high-frequency signal is input, and a collector from which a fourth high-frequency signal is output; a first capacitance circuit electrically connected between the collector of the second transistor and the base of the first transistor; and a second capacitance circuit electrically connected between the collector of the first transistor and the base of the second transistor.
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公开(公告)号：US11145607B2
公开(公告)日：2021-10-12
申请号：US16838977
申请日：2020-04-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yusuke Tanaka , Fumio Harima , Masayuki Aoike , Koshi Himeda
Abstract: A semiconductor chip includes a compound semiconductor substrate having a pair of main surfaces and a side surface therebetween, a circuit on one main surface of the pair of main surfaces, and first metals on the main surface. The first metals are positioned, in plan view of the main surface, closer to an outer edge of the main surface than the circuit, substantially in a ring shape to surround the circuit with gaps between first metals adjacent to each other. The semiconductor chip further includes second metals on the main surface. The second metals are positioned, in plan view of the main surface, between the circuit and the first metals or closer to the outer edge than the first metals. Also, the second metals each are positioned, in plan view of the side surface, such that at least a part thereof overlaps a gap between the first metals.
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公开(公告)号：US09642103B2
公开(公告)日：2017-05-02
申请号：US15082567
申请日：2016-03-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi Tanaka , Takayuki Tsutsui , Yusuke Tanaka , Hayato Nakamura , Kazuhito Nakai
CPC classification number: H04W52/52 , H03F1/0261 , H03F3/195 , H03F3/245 , H03F3/68 , H03F2200/111 , H04B7/265 , H04L5/14 , H04W72/042 , H04W88/06
Abstract: Provided is a communication unit that includes first and second power-amplification modules, which can be integrated. The first power-amplification module includes a first power-amplifier for a first frequency band in a first communication scheme, a second power-amplifier for a second frequency band in the first communication scheme, a third power-amplifier for a third frequency band in a second communication scheme, a fourth power-amplifier for a fourth frequency band in the second communication scheme, a first bias circuit that generates a first bias current to the first and second power-amplifiers, and a bias current circuit that converts the first bias current into a second bias current to the third and fourth power-amplifiers. The second power-amplification module includes a fifth power-amplifier for a fifth frequency band in the first communication scheme, and a second bias circuit that generates a third bias current to the fifth power-amplifier.
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公开(公告)号：US12273080B2
公开(公告)日：2025-04-08
申请号：US17817018
申请日：2022-08-03
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenji Tahara , Syunji Yoshimi , Kazuhiro Ikarashi , Yusuke Tanaka , Kenichi Shimamoto , Masatoshi Hase
Abstract: The present disclosure facilitates impedance matching between a power amplifier and filters. A radio-frequency circuit includes a power amplifier, a plurality of transmit filters, a switch, a plurality of first matching networks, and a second matching network. The switch switches the plurality of transmit filters to be coupled to the power amplifier. The plurality of first matching networks are coupled between the plurality of transmit filters and the switch. The second matching network is coupled between the power amplifier and the switch. The second matching network includes a transmission line transformer.
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