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. 20, 2018
Filed:
May. 29, 2014
Nuvoton Technology Corporation, Hsinchu, TW;
Cheng-Chih Wang, Hsinchu, TW;
Chih-Ping Lu, Hsinchu, TW;
Nuvoton Technology Corporation, Hsinchu, TW;
Abstract
A sensing device includes a comparator, a first and a second variable capacitor unit. A first comparator input of the comparator is electrically coupled to a touch pad. The first variable capacitor unit is configured to charge the first comparator input such that the first comparator input has a first potential. The second variable capacitor unit is configured to charge a second comparator input of the comparator such that the second comparator input has a second potential. The comparator is configured for comparing the first potential and the second potential to generate a comparator output signal. In a condition of the touch pad being operated, the first variable capacitor unit is adjusted according to the comparator output signal to perform potential compensation for the first comparator input, or the second variable capacitor unit is adjusted according to the comparator output signal to perform potential compensation for the second comparator input.