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:
Nov. 24, 2020
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
The present application discloses a capacitance detecting circuit, a touch device and terminal device, which are beneficial for reducing an area of the capacitance detecting circuit, thereby reducing costs of a chip. The capacitance detecting circuit is connected to a measurement capacitor and where it includes a calibration capacitor; a charging and discharging module including a first current source configured to perform charging or discharging on the measurement capacitor, and a second current source configured to perform charging or discharging on the calibration capacitor; an integrator, configured to convert a capacitance signal of the measurement capacitor into a voltage signal; and a control module, configured to control working states of the charging and discharging module and the integrator.