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:
Oct. 13, 2015
Filed:
Mar. 13, 2013
Applicant:
Nxp B.v., Eindhoven, NL;
Inventors:
Han Martijn Schuurmans, Cuijk, NL;
Maarten Wilhelmus Henricus Marie Van Dommelen, Nijmegen, NL;
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 29/00 (2006.01); H04R 3/00 (2006.01); H03M 1/12 (2006.01); H03M 1/18 (2006.01); H04R 3/02 (2006.01); H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
H04R 3/00 (2013.01); H03M 1/183 (2013.01); H03M 3/486 (2013.01); H04R 3/02 (2013.01); H03M 3/49 (2013.01); H04R 2410/00 (2013.01);
Abstract
A microphone circuit has a clip detection circuit which detects when an analogue to digital converter output has reached a threshold. A variable attenuator is controlled based on the clip detection circuit output. The feedback is thus based on the ADC output level, and the processing of this signal can be implemented without requiring baseband processing of the signal—it can simply be based on a state of the ADC output. An overrule function is also provided so that the clip detection AGC control can be inhibited or controlled differently.