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公开(公告)号：US20250096739A1
公开(公告)日：2025-03-20
申请号：US18830720
申请日：2024-09-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA
Abstract: A power amplifier, which includes a plurality of stages of amplification units each of which includes a common-emitter transistor, includes a first amplification unit including a first transistor configured to amplify an input radio-frequency signal, a second amplification unit including a second transistor configured to amplify an output of the first amplification unit, a voltage detection circuit including at least one impedance element and provided between the first transistor and the second transistor, and a protection circuit configured to reduce, based on an output of the voltage detection circuit, a base bias current applied to at least one of the first transistor and the second transistor.
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公开(公告)号：US20240313718A1
公开(公告)日：2024-09-19
申请号：US18669827
申请日：2024-05-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA , Takayuki KAWANO , Fumitoshi DERIHA
CPC classification number: H03F3/245 , H03F1/565 , H03F3/45076 , H03F2200/09 , H03F2200/451
Abstract: A power amplifier circuit includes a first amplifier that amplifies a first signal that is one of balanced signals and outputs a first amplified signal from a first output terminal, a second amplifier that amplifies a second signal that is another of the balanced signals and outputs a second amplified signal from a second output terminal, a balun that generates a third signal from the first amplified signal and the second amplified signal, and a matching circuit that is provided between the first amplifier and the second amplifier, and the balun.
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公开(公告)号：US20210013855A1
公开(公告)日：2021-01-14
申请号：US17038988
申请日：2020-09-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA , Fumio HARIMA , Yoshiki KOGUSHI , Shota ISHIHARA , Fuminori MORISAWA
Abstract: The present disclosure provides a power amplifier circuit capable of suppressing the occurrence of noises while enabling control of an output power level. The power amplifier circuit includes a first transistor that amplifies a first signal; a bias circuit that supplies a bias current or voltage based on a control signal to the first transistor; a second transistor to which a control current based on the control signal is supplied, which has an emitter or a source thereof connected to a collector or a drain of the first transistor, and from which a second signal obtained by amplifying the first signal is output; and a first feedback circuit provided between the collector or the drain of the second transistor and the base or the gate of the second transistor.
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公开(公告)号：US20180083581A1
公开(公告)日：2018-03-22
申请号：US15710426
申请日：2017-09-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shota ISHIHARA , Seiko ONO , Yusuke SHIMAMUNE , Fuminori MORISAWA , Shizuki NAKAJIMA , Yuri HONDA , Kazuhiro KOSHIO , Masato SATO
IPC: H03F3/21
CPC classification number: H03F3/21 , H03F1/0261 , H03F1/22 , H03F1/34 , H03F3/191 , H03F3/245 , H03F2200/144 , H03F2200/18 , H03F2200/318 , H03F2200/408 , H03F2200/451
Abstract: A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.
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公开(公告)号：US20240267012A1
公开(公告)日：2024-08-08
申请号：US18638724
申请日：2024-04-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Makoto ITOU , Yuri HONDA
CPC classification number: H03F3/245 , H03F1/086 , H04B1/0458 , H03F2200/294 , H03F2200/451
Abstract: A power amplifier circuit includes a power supply terminal and an amplifier transistor that has a base terminal, a collector terminal connected to the power supply terminal, and an emitter terminal and that performs power amplification of a radio-frequency input signal input through the base terminal to output a radio-frequency signal subjected to the power amplification from the collector terminal. The amplifier transistor receives first bias current via the base terminal assuming a first power supply voltage is applied to the power supply terminal and receives second bias current smaller than the first bias current via the base terminal assuming a second power supply voltage higher than the first power supply voltage is applied to the power supply terminal.
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Patent Agency Ranking
公开(公告)号：US20240235489A1
公开(公告)日：2024-07-11
申请号：US18405125
申请日：2024-01-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA
CPC classification number: H03F1/0288 , H03F1/565 , H03F3/211 , H03F2200/387
Abstract: A power amplifier circuit includes a first amplifier, a second amplifier, and, an output terminal. The power amplifier circuit includes an impedance conversion unit connected to an output end of one amplifier, which is either the first amplifier or the second amplifier. The impedance conversion unit includes a first line with one end connected to the output end, a second line with one end connected to another end of the first line, and a first capacitor with one end connected to a connection point between the first line and the second line and with another end connected to a reference potential. The first line and the second line are coupled to each other. A signal based on a connection point between an output end of another amplifier of the first amplifier and the second amplifier and another end of the second line is outputted from the output terminal.
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公开(公告)号：US20240235488A1
公开(公告)日：2024-07-11
申请号：US18403131
申请日：2024-01-03
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi TANAKA , Yuri HONDA , Hideyuki SATO
CPC classification number: H03F1/0288 , H03F1/56 , H03F3/211 , H03F2200/387
Abstract: A power amplifier circuit includes: a first amplifier; a second amplifier; and an impedance inverter that delays an output of the first amplifier by a time equivalent to ¼ of a wavelength of a transmission line, and combines the output of the first amplifier delayed by the impedance inverter and an output of the second amplifier and outputs a combined output. The impedance inverter includes a plurality of unit circuits each constituted by an inductor and a capacitor, the plurality of unit circuits are cascade-connected to an output side of the first amplifier, an element included in each unit circuit of the plurality of unit circuits is connected in series to the element of an adjacent unit circuit, and another element included in each unit circuit of the plurality of unit circuits is connected between one end of the element of the same unit circuit.
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公开(公告)号：US20220021352A1
公开(公告)日：2022-01-20
申请号：US17377710
申请日：2021-07-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA
Abstract: A power amplification circuit includes a first amplifier that amplifies a signal split from an input signal, a second amplifier that amplifies a signal having a different phase from the aforementioned signal, third and fourth amplifiers, and a matching network. The matching network includes a first wiring having a first end connected to an output terminal of the first amplifier and a second end connected to an input terminal of the third amplifier, a second wiring having a first end connected to the input terminal of the third amplifier, and electromagnetically coupled to the first wiring, a third wiring having a first end connected to an output terminal of the second amplifier and a second end connected to an input terminal of the fourth amplifier, and a fourth wiring having a first end connected to the input terminal of the fourth amplifier, and electromagnetically coupled to the third wiring.
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公开(公告)号：US20220021341A1
公开(公告)日：2022-01-20
申请号：US17376878
申请日：2021-07-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Satoshi GOTO , Yoshiki KOGUSHI , Yuri HONDA , Kenichi SHIMAMOTO
Abstract: A power amplifier circuit according to the present disclosure includes an amplifier circuit serving as a differential amplifier circuit configured to be activated by a supply voltage that is variable in accordance with amplitude of a signal, a bias circuit configured to output a bias to be supplied to the amplifier circuit, and first and second dispersion circuits respectively provided for a pair of differential signals outputted from the amplifier circuit and configured to control dependence of gain of the differential amplifier circuit on the supply voltage.
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公开(公告)号：US20200382082A1
公开(公告)日：2020-12-03
申请号：US16883128
申请日：2020-05-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA , Fumio HARIMA , Mitsuhiro TOYA
Abstract: A power amplifier circuit includes a first transistor configured to receive a first signal at a base, amplify the first signal, and output a second signal from a collector; and a bias circuit configured to supply a bias current to the base of the first transistor. The bias circuit includes a second transistor configured to supply a bias current to the base of the first transistor, a third transistor including a base connected to a base of the second transistor and a collector connected to a collector of the second transistor, and a fourth transistor including a base connected to an emitter of the third transistor and a collector connected to an emitter of the second transistor and configured to draw at least part of the bias current.
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