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:
Oct. 12, 2021
Filed:
Oct. 03, 2018
Shenzhen Goodix Technology Co., Ltd., Shenzhen, CN;
Mengwen Zhang, Shenzhen, CN;
SHENZHEN GOODIX TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
A fingerprint sensor and a terminal device are provided. The fingerprint sensor includes a plurality of integration circuits () and a negative feedback circuit (); the negative feedback circuit () is connected to the plurality of integration circuits () for respectively fixing an input common mode voltage of each of the integration circuits () as a reset bias voltage when the plurality of integration circuits () are in a reset phase; and each of the integration circuits () corresponds to a fingerprint capacitor respectively, and the integration circuit () is configured to perform integration processing on a charge of the corresponding fingerprint capacitor when in an integration phase, and output an output voltage related to the fingerprint capacitor. A fingerprint sensor and a terminal device of the present application could improve an SNR of a fingerprint image without increasing resources of a main control RAM.