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. 03, 2015
Filed:
Sep. 14, 2010
Applicants:
Olivier Nys, Neuchatel, CH;
Hussein Ballan, Saint Legier, CH;
Norman Chappatte, Estavayer-le-Lac, CH;
François Vuadens, Blonay, CH;
Inventors:
Olivier Nys, Neuchatel, CH;
Hussein Ballan, Saint Legier, CH;
Norman Chappatte, Estavayer-le-Lac, CH;
François Vuadens, Blonay, CH;
Assignee:
Advanced Silicon SA, Lausanne, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 27/26 (2006.01); H03M 1/12 (2006.01); H03M 1/46 (2006.01);
U.S. Cl.
CPC ...
H03M 1/123 (2013.01); H03M 1/46 (2013.01);
Abstract
A circuit for capacitive touch applications has a charge integrator, a low pass-filter, and a correlated double sampler having an input capacitor. The circuit also includes a sampler and holder, and an analog to digital converter. The low pass-filter has a cut-off frequency lower than the Nyquist frequency of the sampler and holder, and the low pass filter includes input capacitor and a serial resistor.