Title:
LDO POWER SUPPLY CIRCUIT AND POWER AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2023/123721
Kind Code:
A1
Abstract:
An LDO power supply circuit (100) and a power amplifier (200). The LDO power supply circuit (100) comprises: an operational amplifier (OP), a first transistor (P1), and a resistance feedback network (10); a negative input end of the operational amplifier (OP) is used for connecting to a control voltage, a positive input end of the operational amplifier (OP) serves as an input end of the LDO power supply circuit (100), and an output end of the operational amplifier (OP) is connected to a gate of the first transistor (P1); a source of the first transistor (P1) is used for connecting to a power supply voltage, a drain of the first transistor (P1) serves as an output end of the LDO power supply circuit (100); the resistance feedback network (10) is connected between the drain of the first transistor (P1) and the positive input end of the operational amplifier (OP); the resistance feedback network (10) comprises a first branch (101) and a second branch (102) which are connected in parallel, the first branch (101) forms a first feedback coefficient, the second branch (102) forms a second feedback coefficient, and the first feedback coefficient is different from the second feedback coefficient. The LDO power supply circuit (100) and the power amplifier (200) have better switching spectrum performance.
Inventors:
ZHOU YONGFENG (CN)
GUO JIASHUAI (CN)
GUO JIASHUAI (CN)
Application Number:
PCT/CN2022/084440
Publication Date:
July 06, 2023
Filing Date:
March 31, 2022
Export Citation:
Assignee:
LANSUS TECH INC (CN)
International Classes:
G05F1/56
Foreign References:
| CN106227282A | 2016-12-14 | |||
| CN110808717A | 2020-02-18 | |||
| CN110320963A | 2019-10-11 | |||
| CN105408829A | 2016-03-16 | |||
| CN113268102A | 2021-08-17 | |||
| CN102722207A | 2012-10-10 | |||
| CN104950975A | 2015-09-30 | |||
| CN105242736A | 2016-01-13 | |||
| CN105425888A | 2016-03-23 | |||
| US6765374B1 | 2004-07-20 |
Attorney, Agent or Firm:
SHENZHEN JUNXINCHENG INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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