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:
Sep. 24, 2019
Filed:
Jan. 11, 2018
Applicant:
Semtech Corporation, Camarillo, CA (US);
Inventors:
Chaouki Rouaissia, Neuchâtel, CH;
Sébastien Grisot, Boudry, CH;
Assignee:
Semtech Corporation, Camarillo, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 3/041 (2006.01); G06F 3/044 (2006.01); H03K 17/955 (2006.01);
U.S. Cl.
CPC ...
G06F 3/0418 (2013.01); G06F 3/044 (2013.01); H03K 17/955 (2013.01); H03K 2217/94026 (2013.01);
Abstract
A portable device including drift-compensated capacitive proximity sensor that exploits a special method of drift compensation based on the variation of the measured proximity signal. The drift is tracked when the variation is within a stated interval, and frozen when the variation is outside. The sensor is capable of following a drift not only when the phone is inactive, but also when it is close to the body of the user, by freezing the tracking when the capacity varies steeply, as when the user moves the device, and resuming it when the variation is within acceptable limits.