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Patent Searching and Data


Title:
LDO, MCU, FINGERPRINT MODULE, AND TERMINAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/087744
Kind Code:
A1
Abstract:
Provided in the present application are an LDO, an MCU, a fingerprint module and a terminal device. The LDO comprises: a reference voltage generation circuit and a source follower that is connected to the reference voltage generation circuit; the reference voltage generation circuit is used to generate a reference voltage that changes along with temperature so as to counteract voltage changes generated by the voltage changing along with the temperature between a first end and second end of the source follower, such that output voltage of the second end of the source follower does not change along with the temperature. The LDO provided in embodiments of the present application omits the operational amplifier EA and resistor voltage-dividing feedback network in the prior art, which not only simplifies the structure of a circuit, but may also achieve ultra-low power consumption. At the same time, output voltage that does not change along with temperature may also be achieved, which may thus be suitable for application scenarios in which power consumption must be low.

Inventors:
CHEN JIANXING (CN)
Application Number:
PCT/CN2019/115716
Publication Date:
May 14, 2021
Filing Date:
November 05, 2019
Export Citation:
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Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
G05F1/567; G05F1/56
Foreign References:
CN109308087A2019-02-05
CN108008755A2018-05-08
US20130300393A12013-11-14
Other References:
See also references of EP 3845994A4
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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