Title:
GAIN COMPENSATION DEVICE AND BIAS CIRCUIT DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/227275
Kind Code:
A1
Abstract:
A gain compensation device (13) and a bias circuit device. A compensation bias current is generated by the gain compensation device (13), so as to compensate a gain deviation of a power amplifier (122), improving the stability of the power amplifier (122). By means of a high-temperature compensation unit (131) and a low-temperature compensation unit (132) having different settings, the gain of the power amplifier (122) is compensated in sections along with temperature changes, improving the feasibility of the gain compensation device (13). The gain compensation device (13) occupies small space, and only has circuits corresponding to the high-temperature compensation unit (131) and the low-temperature compensation unit (132), so that the circuits are simple, thereby being beneficial to miniaturization. In the bias circuit device, on the basis of an initial bias current provided by a band gap reference source (121), the gain compensation device (13) is added to generate a compensation bias current, and the initial bias current and the compensation bias current are superposed, so as to further compensate a gain of the power amplifier (122) along with temperature changes, improving the stability of the power amplifier (122).
Inventors:
FENG JINGHAO (CN)
NI JIANXING (CN)
NI JIANXING (CN)
Application Number:
PCT/CN2020/108602
Publication Date:
November 18, 2021
Filing Date:
August 12, 2020
Export Citation:
Assignee:
RADROCK SHENZHEN TECH CO LTD (CN)
International Classes:
H03G3/30; H03F1/30
Domestic Patent References:
| WO2019078529A1 | 2019-04-25 |
Foreign References:
| CN105320199A | 2016-02-10 | |||
| CN103412606A | 2013-11-27 | |||
| CN104977969A | 2015-10-14 | |||
| CN111294004A | 2020-06-16 | |||
| CN102073334A | 2011-05-25 |
Attorney, Agent or Firm:
SHENZHEN ZHONGDINGHUICHENG INTELLCCTUAL PROPERTY AGENCY (CN)
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