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:
Feb. 16, 2021
Filed:
May. 22, 2019
Shenzhen Goodix Technology Co., Ltd., Shenzhen, CN;
Zhengfeng Wang, Shenzhen, CN;
Shuo Fan, Shenzhen, CN;
SHENZHEN GOODIX TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
A capacitance detecting circuit, includes a first front end circuit, a second front end circuit, a control circuit and a processing circuit, wherein the control circuit controls the first front end circuit and the second front end circuit such that the first front end circuit is configured to convert a capacitance signal of a detection capacitor into a first voltage signal through a first calibration capacitor, and the second front end circuit is configured to convert a capacitance signal of the detection capacitor into a second voltage signal through a second calibration capacitor; the processing circuit is calculates a differential signal of the first voltage signal and the second voltage signal to determine a capacitance variation of the detection capacitor according to the differential signal.