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Title:
RADIO FREQUENCY POWER AMPLIFIER BASED ON POWER DETECTION FEEDBACK, CHIP, AND COMMUNICATION TERMINAL
Document Type and Number:
WIPO Patent Application WO/2019/007294
Kind Code:
A1
Abstract:
Disclosed in the present invention are a radio frequency power amplifier based on power detection feedback, a chip, and a communication terminal. The radio frequency power amplifier comprises multiple stages of amplifier circuits and at least one power detection feedback circuit; the input end of the power detection feedback circuit is connected to the output end of a current stage of amplifier circuit, and the output end of the power detection feedback circuit is connected to the input ends of the current stage of amplifier circuit and at least one stage of amplifier circuit located prior to the current stage of amplifier circuit. The power detection feedback circuit generates, according to the detected output power of the current stage of amplifier circuit, a control voltage varying inversely with the output power, so that the power detection feedback circuit outputs current varying positively with the control voltage. The quiescent operating current of the current stage of amplifier circuit and at least one stage of amplifier circuit located prior to the current stage of amplifier circuit is controlled by means of the current, 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:
CN2018/093936
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:
H03F3/24; H03G3/30
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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