Title:
DETECTION CIRCUIT, CHIP, AND RELATED ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/155878
Kind Code:
A1
Abstract:
Disclosed are a detection circuit, a chip, and a related electronic apparatus. The detection circuit comprises first to fourth input terminals, first to eighth switching circuits, and a differential integral circuit. The first to eighth switching circuits are configured to charge and discharge a first sensing capacitor and a second sensing capacitor in a detection operation, so as to eliminate the impact of a first mutual capacitance between the first sensing capacitor and the second sensing capacitor on a detection voltage signal in the detection operation, so that the differential integral circuit outputs, according to sensing capacitance values of the first sensing capacitor and the second sensing capacitor, a detection voltage signal related to the approaching of a human body.
Inventors:
YU QIAN (CN)
Application Number:
PCT/CN2021/073214
Publication Date:
July 28, 2022
Filing Date:
January 22, 2021
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
G01R27/26; G06F3/044
Foreign References:
| CN102163109A | 2011-08-24 | |||
| CN111813271A | 2020-10-23 | |||
| CN111837044A | 2020-10-27 | |||
| CN110895293A | 2020-03-20 | |||
| CN107636596A | 2018-01-26 | |||
| US20050134292A1 | 2005-06-23 |
Attorney, Agent or Firm:
TIANTAI LAW FIRM (CN)
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