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. 18, 2020
Filed:
Oct. 13, 2017
Shenzhen Goodix Technology Co., Ltd., Shenzhen, CN;
Yu An Liang, Shenzhen, CN;
SHENZHEN GOODIX TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
A capacitive sensing circuit () includes a sample-and-hold circuit (SH) coupled to the contact capacitor (Cf); an integrating circuit () coupled to the sample-and-hold circuit (SH); a comparator (comp) coupled to the integrating circuit (); a counter (cntr) coupled to a comparison output terminal and configured to accumulate a cumulative number (N) of transitions of the comparator (comp); a voltage boost circuit () coupled to the integrating circuit () and configured to add a specific value (V) to an integrating output voltage (V) when the comparator (comp) performs a transition; and a logic circuit () coupled to the counter (cntr), where the logic circuit () outputs an integration time (T) of the integrating circuit () when the cumulative number is equal to a predetermined number (N), and the integration time (T) correlates with a capacitance value of the contact capacitor (Cf).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile