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:
Dec. 01, 2015
Filed:
Dec. 20, 2013
Applicant:
St-ericsson SA, Plan-les-Ouates, CH;
Inventors:
Christian Fraisse, Grenoble, FR;
Angelo Nagari, Grenoble, FR;
Assignee:
ST-ERICSSON SA, Plan-les-Ouates, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 15/00 (2006.01); H04R 3/00 (2006.01); H03F 3/217 (2006.01); H03F 3/45 (2006.01); H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
H04R 3/00 (2013.01); H03F 3/2175 (2013.01); H03F 3/45968 (2013.01); H03M 3/384 (2013.01); H03F 2200/331 (2013.01); H03F 2200/375 (2013.01); H03M 3/50 (2013.01);
Abstract
There is described Audio driver circuit comprising a main, 1-bit digital-to-analog converter, adapted to receive a 1-bit oversampled digital audio signal. Thanks to an auxiliary digital-to-analog converter which converts into the analog domain a digital offset compensation value stored in e.g. an OTP memory register, and to a summing and filtering arrangement, it is possible to reduce the offset cancellation granularity in order to compensate for the offset of the main digital-to-analog converter in the output signal.