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:
Mar. 25, 2014
Filed:
Oct. 12, 2010
Yen-lin Huang, Taipei, TW;
Hsin-hao Wang, Tainan, TW;
Yen-Lin Huang, Taipei, TW;
Hsin-Hao Wang, Tainan, TW;
Orise Technology Co., Ltd., Hsinchu, TW;
Abstract
A sensing circuit of a capacitive touch panel includes an operation amplifier, a first switch, a second switch, first and second feedback capacitors, a third switch, a fourth switch, a fifth switch and a sixth switch. The operation amplifier includes a positive input terminal, a negative input terminal and an output terminal. A reference voltage is inputted into the positive input terminal. The first switch is connected between a receiving electrode and the negative input terminal. The second switch is connected between the negative input terminal and the output terminal. The third switch is connected to the negative input terminal and the first feedback capacitor. The fourth switch is connected to the first feedback capacitor and the output terminal. The fifth switch is connected to the negative input terminal and the second feedback capacitor. The sixth switch is connected to the second feedback capacitor and the output terminal.