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. 16, 2016
Filed:
Mar. 16, 2011
Applicant:
Han M. Schuurmans, Cuijk, NL;
Inventor:
Han M. Schuurmans, Cuijk, NL;
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 1/18 (2006.01); H03M 3/00 (2006.01); H04R 3/02 (2006.01);
U.S. Cl.
CPC ...
H03M 1/183 (2013.01); H03M 3/48 (2013.01); H04R 3/02 (2013.01); H04R 2410/00 (2013.01);
Abstract
A microphone circuit has a clip detection circuit () which detects when an analog to digital converter (ADC,) output has reached a threshold. A variable capacitance (), which functions as a variable input load associated with the microphone (), 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.