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:
Apr. 21, 2020
Filed:
Jan. 26, 2019
Shenzhen Goodix Technology Co., Ltd., Shenzhen, CN;
Hong Jiang, Shenzhen, CN;
Guangkai Yuan, Shenzhen, CN;
SHENZHEN GOODIX TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
The present application provides a differential circuit, which can improve a signal-to-noise ratio of an output signal. The differential circuit includes a front-end circuit and a processing circuit, where the front-end circuit includes a control circuit and a PGA circuit. The control circuit is configured to: control, at a first stage, the power supply to charge the two capacitors and control the two capacitors to discharge to the PGA circuit; and control, at a second stage, the PGA circuit to charge the two capacitors. The PGA circuit is configured to convert capacitance signals of the two capacitors into voltage signals at the first stage and the second stage respectively, and perform a difference operation. The processing circuit is configured to determine, according to the differential signals output by the front-end circuit at the first stage and the second stage, a target differential signal of voltages corresponding to the two capacitors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile