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:
Nov. 11, 2014
Filed:
Jun. 29, 2004
Applicants:
Frederick A. Rush, Austin, TX (US);
Lionel M. Cimaz, Pleumeleuc, FR;
Wasim Quddus, Austin, TX (US);
Inventors:
Assignee:
ST-Ericsson SA, Plan-les-Ouates, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 17/94 (2006.01); H03M 11/00 (2006.01); H04B 1/40 (2006.01); G06F 1/16 (2006.01); G06F 3/02 (2006.01); H04B 15/02 (2006.01);
U.S. Cl.
CPC ...
H04B 1/40 (2013.01); G06F 1/1613 (2013.01); G06F 1/1662 (2013.01); G06F 1/1698 (2013.01); G06F 3/0202 (2013.01); G06F 3/0227 (2013.01); H04B 15/02 (2013.01);
Abstract
Apparatus and methods for scanning a keypad of a communications device in a manner that tends to minimize interference with transceiver operation, such as a RF transceiver. In one embodiment, a controller receives a periodic signal of the communications device and provides a scan signal to cause the keypad to be scanned. In a sleep mode a keypad scan is performed only subsequent to a keypad activation. However, if the communications device is in use a keypad scan is performed once per frame at predetermined intervals, in one embodiment.