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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.:

US 8884791 B1

PDFFull Text
Expired
Date of Patent:
Nov. 11, 2014

Filed:

Jun. 29, 2004

Keypad scanning with radio event isolation

Applicants:

Frederick A. Rush, Austin, TX (US);

Lionel M. Cimaz, Pleumeleuc, FR;

Wasim Quddus, Austin, TX (US);

Inventors:

Frederick A. Rush, Austin, TX (US);

Lionel M. Cimaz, Pleumeleuc, FR;

Wasim Quddus, Austin, TX (US);

Assignee:

ST-Ericsson SA, Plan-les-Ouates, CH;

Attorney:

Howison & Arnott, LLP

Primary Examiner:

Hai Phan

Assistant Examiner:

Amine Benlagsir

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.

Find Patent Forward Citations

Quick Actions:

Rush, Frederick. (2014). Keypad scanning with radio event isolation (U.S. Patent No. 8884791). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8884791

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