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Title:
RADIO FREQUENCY POWER AMPLIFIER BASED ON CURRENT DETECTION FEEDBACK, CHIP, AND COMMUNICATION TERMINAL
Document Type and Number:
WIPO Patent Application WO/2019/007295
Kind Code:
A1
Abstract:
Disclosed in the present invention are a radio frequency power amplifier based on current detection feedback, a chip, and a communication terminal. The radio frequency power amplifier comprises multiple stages of amplifier circuits and at least one current detection feedback circuit; the input end of the current detection feedback circuit is connected to the input end of a current stage of amplifier circuit among the multiple stages of amplifier circuits by means of a corresponding resistor, and the output end of the current detection feedback circuit is connected to the input end of at least one stage of amplifier circuit prior to the current stage of amplifier circuit. The current detection feedback circuit generates, according to the detected quiescent operating current of the current stage of amplifier circuit, a control voltage varying inversely with the quiescent operating current, so that the current detection feedback circuit outputs current varying positively with the control voltage. The current is input to the input end of the at least one stage of amplifier circuit prior to the current stage of amplifier circuit, and the quiescent operating current of the at least one stage of amplifier circuit prior to the current stage of amplifier circuit is controlled, so that the radio frequency power amplifier operates in a state in which the gain and the output power are stable.

Inventors:
ZHAO, Jinxin (Room 2701-3, Building 2No.19 Xinhuan W. Rd., Binghai New Area, Tianjin 7, 300457, CN)
BAI, Yunfang (Room 2701-3, Building 2No.19 Xinhuan W. Rd., Binghai New Area, Tianjin 7, 300457, CN)
Application Number:
CN2018/093937
Publication Date:
January 10, 2019
Filing Date:
June 30, 2018
Export Citation:
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Assignee:
VANCHIP (TIANJIN) TECHNOLOGY CO., LTD. (Room 2701-3, Building 2No.19 Xinhuan W. Rd., Binghai New Area, Tianjin 7, 300457, CN)
International Classes:
H03F3/193; H03G3/12
Foreign References:
CN107404296A2017-11-28
CN106100590A2016-11-09
CN101656511A2010-02-24
CN106788285A2017-05-31
CN103457550A2013-12-18
US9595926B22017-03-14
Attorney, Agent or Firm:
BEIJING GENIUS ESSEN INTELLECTUAL PROPERTY OFFICE (Room 806~809, Taifeng Huizhong MansionNo.120 Zhushikou W.St., Xicheng District, Beijing 0, 100050, CN)
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