Title:
RADIO FREQUENCY POWER AMPLIFIER, CHIP, AND COMMUNICATION TERMINAL
Document Type and Number:
WIPO Patent Application WO/2021/093822
Kind Code:
A1
Abstract:
A radio frequency power amplifier, a chip, and a communication terminal. The radio frequency power amplifier comprises a power amplifier circuit (5), an output matching circuit (2), a power measurement circuit (3), and a bias comparison circuit (4). The output power on a main signal path is measured by the power measurement circuit (3), and an equivalent voltage proportional to the output power is obtained and input to the bias comparison circuit (4); the equivalent voltage value is adjusted by means of the bias comparison circuit (4) and compared with a control voltage (1) to provide a bias voltage and/or collector voltage for the power amplifier circuit (5), thereby forming a closed-loop circuit, such that the radio frequency power amplifier can work in a stable state when gains and output power are in different power levels.
Inventors:
ZHAO JINXIN (CN)
BAI YUNFANG (CN)
BAI YUNFANG (CN)
Application Number:
PCT/CN2020/128471
Publication Date:
May 20, 2021
Filing Date:
November 12, 2020
Export Citation:
Assignee:
VANCHIP TIANJIN TECH CO LTD (CN)
International Classes:
H03F3/195; H03F3/213; H03F3/24
Foreign References:
| CN110855254A | 2020-02-28 | |||
| CN109510634A | 2019-03-22 | |||
| CN109428554A | 2019-03-05 | |||
| CN106937364A | 2017-07-07 | |||
| US20180316312A1 | 2018-11-01 |
Other References:
See also references of EP 4060896A4
Attorney, Agent or Firm:
BEIJING GENIUS ESSEN INTELLECTUAL PROPERTY OFFICE (CN)
Download PDF: