Title:
VOLTAGE BIAS CIRCUIT WITH ADJUSTABLE OUTPUT, AND CHIP AND COMMUNICATION TERMINAL
Document Type and Number:
WIPO Patent Application WO/2022/105890
Kind Code:
A1
Abstract:
Provided are a voltage bias circuit with an adjustable output, and a chip and a communication terminal. The bias circuit comprises a bandgap voltage reference unit, a low-dropout linear voltage regulation unit, a first transmission gate switch unit, a logic encoding control unit and a second transmission gate switch unit. In the bias circuit, a resistance voltage-dividing network and a feedback resistance network are correspondingly arranged in a bandgap voltage reference unit and a low-dropout linear voltage regulation unit, so as to generate a plurality of voltages with different temperature coefficients and different values, and different gain coefficients; a logic encoding control unit is used to control a corresponding transmission gate switch unit to select an input reference voltage with a required value and temperature coefficient, and a required gain coefficient, so as to output a voltage with a required value and temperature coefficient; and a suitable bias state is provided for a radio frequency front-end module, such that the radio frequency front-end module realizes better performance, and a communication terminal has better flexibility and adaptability in a complicated environment.
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Inventors:
GAO CHENYANG (CN)
LIN SHENG (CN)
LIN SHENG (CN)
Application Number:
PCT/CN2021/131898
Publication Date:
May 27, 2022
Filing Date:
November 19, 2021
Export Citation:
Assignee:
VANCHIP TIANJIN TECH CO LTD (CN)
International Classes:
G05F1/567
Foreign References:
| CN112327992A | 2021-02-05 | |||
| CN102289238A | 2011-12-21 | |||
| CN106227282A | 2016-12-14 | |||
| US6177785B1 | 2001-01-23 |
Attorney, Agent or Firm:
BEIJING GENIUS ESSEN INTELLECTUAL PROPERTY OFFICE (CN)
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