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:
Aug. 06, 2013
Filed:
Sep. 25, 2008
Uma Chilakapati, San Diego, CA (US);
Seyfollah Bazarjani, San Diego, CA (US);
Joseph Fitzgerald, San Diego, CA (US);
Guoqing Miao, San Diego, CA (US);
Hui-ya Nelson, San Diego, CA (US);
Khalid Sidiqi, San Diego, CA (US);
Jeffrey Hinrichs, San Diego, CA (US);
Uma Chilakapati, San Diego, CA (US);
Seyfollah Bazarjani, San Diego, CA (US);
Joseph Fitzgerald, San Diego, CA (US);
Guoqing Miao, San Diego, CA (US);
Hui-Ya Nelson, San Diego, CA (US);
Khalid Sidiqi, San Diego, CA (US);
Jeffrey Hinrichs, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A digital offset is combined with an audio signal in the digital domain to cancel an output offset caused by one or more analog components processing the same audio signal. In this manner, the offset at the output of the audio signal path (e.g., at a power amplifier output) is reduced or eliminated. Consequently, audible artifacts, such as click-and-pop artifacts, can be reduced or eliminated. In audio devices operating in ground-referenced capless mode, power consumption is reduced because of reduced or eliminated direct current (DC) leakage current through speakers or headsets of such audio devices. In some circumstances, the digital offset in the digital domain may be applied at substantially all times of operation of the audio signal path.