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

IPC: H03F1/32 ,  H03F3/21

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.

公开(公告)号：US20200321927A1

公开(公告)日：2020-10-08

申请号：US16839226

申请日：2020-04-03

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toshikazu TERASHIMA ,  Fumio HARIMA ,  Makoto ITOU ,  Satoshi TANAKA ,  Kazuo WATANABE ,  Satoshi ARAYASHIKI ,  Chikara YOSHIDA

IPC: H03F3/213 ,  H01L29/417 ,  H01L27/06 ,  H01L29/423 ,  H01L29/737

Abstract: A power amplifier apparatus includes a semiconductor substrate, a plurality of first transistors on the semiconductor substrate, a plurality of second transistors, at least one collector terminal electrically connected to collectors of the plurality of first transistors, a first inductor having a first end electrically connected to the collector terminal and a second end electrically connected to a power supply potential, at least one emitter terminal electrically connected to emitters of the plurality of second transistors and adjacent to the collector terminal in a second direction, a second inductor having a first end electrically connected to the emitter terminal and a second end electrically connected to a reference potential, and at least one capacitor having a first end electrically connected to the collectors of the plurality of first transistors and a second end electrically connected to the emitters of the plurality of second transistors.

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

IPC: H03F3/24 ,  H03F1/08 ,  H04B1/04

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.

公开(公告)号：US20220021358A1

公开(公告)日：2022-01-20

申请号：US17374065

申请日：2021-07-13

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Makoto ITOU ,  Satoshi ARAYASHIKI ,  Satoshi GOTO

IPC: H03F3/24 ,  H03F1/02

Abstract: A power amplifier circuit includes a first transistor having a first terminal to which a first signal inputs, a second transistor having a first terminal to which the first signal inputs, a first resistor having a first end to which a first bias current is supplied and a second end electrically connected to the first terminal of the first transistor, a second resistor having a first end to which a second bias current is supplied and a second end electrically connected to the first terminal of the second transistor, and a third resistor having a first end connected to the first end of the first resistor and a second end connected to the first end of the second resistor.

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

IPC: H03F1/30 ,  H03F1/56 ,  H03F1/02 ,  H03F3/213 ,  H03F3/19

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.