公开(公告)号：US10177724B2

公开(公告)日：2019-01-08

申请号：US15600993

申请日：2017-05-22

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Tanaka ,  Kazuo Watanabe ,  Takayuki Tsutsui ,  Masao Kondo ,  Satoshi Arayashiki ,  Fumio Harima ,  Masatoshi Hase

IPC: H03F3/04 ,  H03F3/24 ,  H03F1/02 ,  H03F1/56 ,  H03F3/00 ,  H03F3/195 ,  H03F3/21 ,  H04L5/00 ,  H04L5/14 ,  H03F1/22 ,  H04W88/00

Abstract: A power amplifier circuit includes first and second transistors and a first voltage output circuit. A radio frequency signal is input into a base of the first transistor. The first voltage output circuit outputs a first voltage in accordance with a power supply voltage. The first voltage is supplied to a base or a gate of the second transistor. An emitter or a source of the second transistor is connected to a collector of the first transistor. A first amplified signal generated by amplifying the radio frequency signal is output from a collector or a drain of the second transistor.

公开(公告)号：US09654075B2

公开(公告)日：2017-05-16

申请号：US15092362

申请日：2016-04-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoshi Arayashiki ,  Satoshi Goto

IPC: G06G7/12 ,  H03G3/30 ,  H03F3/191 ,  H03F3/21 ,  H03F3/24

CPC classification number: H03G3/3042 ,  H03F1/0205 ,  H03F3/19 ,  H03F3/191 ,  H03F3/21 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/18 ,  H03F2200/21 ,  H03F2200/324 ,  H03F2200/451 ,  H03F2203/21181 ,  H03G1/0088

Abstract: Provided is a power amplification module that includes: a first transistor, a first signal being inputted to a base thereof; a second transistor, the first signal being inputted to a base thereof and a collector thereof being connected to a collector of the first transistor; a first resistor, a first bias current being supplied to one end thereof and another end thereof being connected to the base of the first transistor; a second resistor, one end thereof being connected to the one end of the first resistor and another end thereof being connected to the base of the second transistor; and a third resistor, a second bias current being supplied to one end thereof and another end thereof being connected to the base of the second transistor.

公开(公告)号：US09577580B2

公开(公告)日：2017-02-21

申请号：US15251012

申请日：2016-08-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kiichiro Takenaka ,  Masahiro Ito ,  Masakazu Hori ,  Mitsuo Ariie ,  Hayato Nakamura ,  Satoshi Arayashiki ,  Hidetoshi Matsumoto ,  Tsuyoshi Sato ,  Satoshi Tanaka

IPC: H03F1/52 ,  H03F3/191 ,  H03F1/02 ,  H03F3/21 ,  H03F3/19 ,  H03F1/32

CPC classification number: H03F1/0222 ,  H03F1/02 ,  H03F1/0216 ,  H03F1/0261 ,  H03F1/32 ,  H03F1/42 ,  H03F1/52 ,  H03F1/56 ,  H03F3/04 ,  H03F3/19 ,  H03F3/21 ,  H03F2200/102 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2200/444 ,  H03F2200/451 ,  H03G3/004

Abstract: Improvement in linearity is achieved at low costs in a power amplifier module employing an envelope tracking system. The power amplifier module includes a first power amplifier circuit that amplifies a radio frequency signal and that outputs a first amplified signal, a second power amplifier circuit that amplifies the first amplified signal on the basis of a source voltage varying depending on amplitude of the radio frequency signal and that outputs a second amplified signal, and a matching circuit that includes first and second capacitors connected in series between the first and second power amplifier circuit and an inductor connected between a node between the first and second capacitors and a ground and that decreases a gain of the first power amplifier circuit as the source voltage of the second power amplifier circuit increases.

Abstract translation: 在采用包络跟踪系统的功率放大器模块中，以低成本实现线性度的改善。 功率放大器模块包括：放大射频信号并输出​​第一放大信号的第一功率放大器电路;第二功率放大器电路，其根据根据射频幅度变化的源电压放大第一放大信号 信号，并且输出第二放大信号，以及匹配电路，其包括串联连接在第一和第二功率放大器电路之间的第一和第二电容器以及连接在第一和第二电容器之间的节点与地之间的电感器， 随着第二功率放大器电路的源极电压的增加，第一功率放大器电路的增益增加。