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1. (WO2018001380) MULTI-GAIN MODE POWER AMPLIFIER, CHIP, AND COMMUNICATION TERMINAL

Pub. No.:    WO/2018/001380    International Application No.:    PCT/CN2017/091341
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Sat Jul 01 01:59:59 CEST 2017
IPC: H03G 3/30
Applicants: VANCHIP (TIANJIN) TECHNOLOGY CO., LTD.
唯捷创芯(天津)电子技术股份有限公司
Inventors: ZHAO, Jinxin
赵锦鑫
Title: MULTI-GAIN MODE POWER AMPLIFIER, CHIP, AND COMMUNICATION TERMINAL
Abstract:
A multi-gain mode power amplifier, a chip, and a communication terminal. The multi-gain mode power amplifier comprises at least one amplifier circuit. The amplifier circuit comprises a bias circuit, a feedback circuit, a transistor (101), and an input matching network/output matching network. A bias voltage or a control voltage (120) is adjusted to make the feedback circuit to be either turned on or turned off, thus allowing the amplifier circuit to work in a high-gain mode or a low-gain mode. The multi-gain mode power amplifier has different gain modes, fully satisfies the actual demand of the communication terminal to work in the high-gain mode when transmitting a high power and to work in the low-gain mode when transmitting a low power.