公开(公告)号：US10044330B2

公开(公告)日：2018-08-07

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

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.

公开(公告)号：US10476454B2

公开(公告)日：2019-11-12

申请号：US16280180

申请日：2019-02-20

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 ,  H03F1/22 ,  H03F1/34 ,  H03F3/191 ,  H03F3/24 ,  H03F1/02

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.

公开(公告)号：US10256778B2

公开(公告)日：2019-04-09

申请号：US16013039

申请日：2018-06-20

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 ,  H03F3/24 ,  H03F3/191 ,  H03F1/34 ,  H03F1/22 ,  H03F1/02

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.