Invention Grant
- Patent Title: Power amplifier module
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Application No.: US15918414Application Date: 2018-03-12
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Publication No.: US10153737B2Publication Date: 2018-12-11
- Inventor: Shota Ishihara , Yusuke Shimamune
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Kyoto-Fu
- Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee Address: JP Kyoto-Fu
- Agency: Pearne & Gordon LLP
- Priority: JP2017-047445 20170313
- Main IPC: H03F1/30
- IPC: H03F1/30 ; H03F3/21 ; H03F3/195 ; H03F3/213

Abstract:
A power amplifier module includes an amplifier that amplifies an input signal and outputs an amplified signal, an emitter follower transistor that supplies a bias signal to the amplifier to control a bias point of the amplifier, and a current source that supplies a control current which changes in accordance with a change in control voltage to a collector of the emitter follower transistor. The current source limits the control current to not greater than an upper limit.
Public/Granted literature
- US20180262165A1 POWER AMPLIFIER MODULE Public/Granted day:2018-09-13
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