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公开(公告)号：US20240204730A1
公开(公告)日：2024-06-20
申请号：US18544917
申请日：2023-12-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jun ENOMOTO , Shohei IMAI
CPC classification number: H03F1/0288 , H03F1/56 , H03F3/245 , H03F3/602 , H03F2200/198 , H03F2200/204 , H03F2200/423 , H03F2200/451
Abstract: A power amplifier includes a first amplifier configured to amplify a first high-frequency signal, a second amplifier configured to amplify a second high-frequency signal delayed with respect to the first high-frequency signal by at least 90 degrees, a hybrid coupler including a first transmission line and a second transmission line, a first power-supply circuit for the first amplifier, a second power-supply circuit for the second amplifier, and an output matching network. The hybrid coupler is connected to an output end of the first amplifier at a first end of the first transmission line. The first transmission line is connected to the first power-supply circuit and the output matching network at a second end. The second transmission line is connected to an output end of the second amplifier at a first end. The second transmission line is connected to the second power-supply circuit at a second end.
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公开(公告)号：US20220069780A1
公开(公告)日：2022-03-03
申请号：US17410003
申请日：2021-08-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jun ENOMOTO , Yuri HONDA , Satoshi TANAKA , Fumio HARIMA
Abstract: A power amplifier circuit includes: a high pass filter that has one end into which a high frequency input signal is inputted; a first amplifier that amplifies the high frequency input signal outputted from the other end of the high pass filter and outputs a high frequency signal obtained through the first amplification; a second amplifier that amplifies the high frequency signal and outputs a high frequency output signal obtained through the second amplification; an automatic transformer that performs impedance matching between the first amplifier and the second amplifier; and an impedance circuit, one end of which is electrically connected with the other end of the high pass filter, the other end of which is electrically connected with an output terminal of a bias circuit outputting bias voltage or bias current to the first amplifier, and that outputs the high frequency input signal to the bias circuit.
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公开(公告)号：US20210399701A1
公开(公告)日：2021-12-23
申请号：US17350385
申请日：2021-06-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA , Jun ENOMOTO , Fumio HARIMA , Satoshi TANAKA
Abstract: A differential amplifier circuit includes a first and second amplifiers that output a differential signal in a radio-frequency band, a first inductor having a first end connected to an output end of the first amplifier, a second inductor having a first end connected to an output end of the second amplifier, a choke inductor connected to second ends of the first and second inductors, a first and second capacitors, and a switch that connects the second capacitor in parallel to the first capacitor or terminates a parallel connection of the first and second capacitors. A resonant circuit formed by connecting the first or second inductor in series with the first capacitor has a different resonant frequency from a resonant circuit formed by connecting the first or second inductor in series with the parallel-connected first and second capacitors. These resonant frequencies correspond to second harmonic frequencies of the differential signal.
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公开(公告)号：US20210359649A1
公开(公告)日：2021-11-18
申请号：US17315911
申请日：2021-05-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA , Jun ENOMOTO , Fumio HARIMA
Abstract: A matching circuit includes an input terminal configured to receive an amplified signal from a power amplifier, an output terminal, a first inductor having a first end connected to the input terminal, and a second end connected to the output terminal, a first capacitor connected in parallel to the first inductor, a second inductor having a first end connected to the input terminal, and a second end connected to ground, and a first series resonant circuit connected in parallel to the second inductor.
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公开(公告)号：US20210175857A1
公开(公告)日：2021-06-10
申请号：US17109389
申请日：2020-12-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jun ENOMOTO , Kazuo WATANABE , Satoshi TANAKA , Yusuke TANAKA , Makoto ITOU
Abstract: A power amplifier circuit includes first and second bias circuits configured to provide first and second biases, respectively, a first transistor having an emitter connected to a reference potential, a base configured to receive the first bias via a first resistor and receive a radio-frequency input signal via a first capacitor, and a collector configured to output an amplified radio-frequency signal, a second transistor having a base connected to the reference potential via a second capacitor and configured to receive the second bias via a second resistor, an emitter configured to receive the radio-frequency signal, and a collector connected to a power supply potential via a third inductor and configured to output a radio-frequency output signal, and an impedance circuit having a first end connected to an output section of the second bias circuit and configured to apply an alternating-current signal to a path extending from the second bias circuit.
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Patent Agency Ranking
公开(公告)号：US20230155556A1
公开(公告)日：2023-05-18
申请号：US18054191
申请日：2022-11-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA , Jun ENOMOTO , Mitsunori SAMATA
CPC classification number: H03F1/565 , H03F3/245 , H03F3/602 , H03F3/19 , H03F2200/451 , H03F2200/318
Abstract: A matching circuit includes: a first wire having one end connected to a first terminal and another end; a second wire having one end connected to the other end of the first wire and another end connected to a first reference potential and electromagnetically coupled to the first wire; and a third wire having one end connected to the one end of the second wire and another end connected to a second terminal and electromagnetically coupled to at least one of the first wire and the second wire.
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公开(公告)号：US20220247376A1
公开(公告)日：2022-08-04
申请号：US17649821
申请日：2022-02-03
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuri HONDA , Jun ENOMOTO , Satoshi TANAKA
Abstract: A differential amplification circuit includes a differential amplifier configured to output a signal including harmonics and first and second filters configured to reduce level of an even harmonic included in output from the differential amplifier. The first and second filters are connected to output of the differential amplifier. The first filter includes a resonant circuit composed of a capacitor and an inductor and a resonant circuit composed of a capacitor and the inductor. The second filter includes a resonant circuit composed of a capacitor and an inductor and a resonant circuit composed of a capacitor and the inductor. A center frequency of the first filter is lower than a center frequency of the even harmonic. A center frequency of the second filter is higher than the center frequency of the even harmonic.
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公开(公告)号：US20210226595A1
公开(公告)日：2021-07-22
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：US20250105794A1
公开(公告)日：2025-03-27
申请号：US18894479
申请日：2024-09-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jun ENOMOTO , Shohei IMAI , Hideyuki SATO
Abstract: A substrate and a chip device mounted on a main surface of the substrate are provided. The chip device is provided with a first differential amplifier including a first carrier amplifier and a second carrier amplifier, and a second differential amplifier including a first peak amplifier and a second peak amplifier. In the chip device, the first carrier amplifier and the second carrier amplifier are disposed side by side in a first direction, the first carrier amplifier and the first peak amplifier are disposed side by side in a second direction different from the first direction, the first peak amplifier and the second peak amplifier are disposed side by side in the first direction, and the second carrier amplifier and the second peak amplifier are disposed side by side in the second direction.
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公开(公告)号：US20200313629A1
公开(公告)日：2020-10-01
申请号：US16828630
申请日：2020-03-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Toshikazu TERASHIMA , Satoshi TANAKA , Kazuo WATANABE , Makoto ITOU , Jun ENOMOTO
Abstract: A power amplifier circuit includes a first transistor, a capacitor, and a second transistor. The first transistor has an emitter electrically connected to a reference potential, a base, and a collector electrically connected to a first power supply potential. A first end of the capacitor is electrically connected to the collector of the first transistor. The second transistor has an emitter electrically connected to a second end of the capacitor and electrically connected to the reference potential, a base, and a collector electrically connected to the first power supply potential. An RF output signal obtained by amplifying the RF input signal is output from the collector of the second transistor. A second bias circuit includes a third transistor having a collector electrically connected to a second power supply potential, a base, and an emitter from which the second bias current or voltage is output.
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