The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2021
Filed:
Nov. 02, 2018
Shenzhen Goodix Technology Co., Ltd., Shenzhen, CN;
Hong Jiang, Shenzhen, CN;
Guanjun Zhang, Shenzhen, CN;
SHENZHEN GOODIX TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
Provided are a capacitance detection circuit (). The capacitance detection circuit () is used for detecting capacitances of N capacitors to be detected, and includes: a reference capacitor, at least N−1 first front end circuits () for converting capacitance signals of the capacitors to be detected into first voltage signals and performing differencing on the first voltage signals, at least one second front end circuit () for converting capacitance signals of a capacitor to be detected and a reference capacitor into second voltage signals and performing differencing on the second voltage signals, and a processing circuit (); and the processing circuit () determines a capacitance value of each of the N capacitors to be detected according to a first differential signal output by each of the first front end circuits () and a second differential signal output by each of the second front end circuits ().