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:
Jul. 25, 2017
Filed:
May. 22, 2015
Method and apparatus for improving performance of digital microelectromechanical systems microphones
Applicant:
Invensense, Inc., San Jose, CA (US);
Inventor:
Omid Oliaei, Sunnyvale, CA (US);
Assignee:
INVENSENSE, INC., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/08 (2006.01); H03G 3/30 (2006.01); H03G 5/16 (2006.01); H04R 3/00 (2006.01); H04R 19/04 (2006.01);
U.S. Cl.
CPC ...
H04R 1/08 (2013.01); H03G 3/3005 (2013.01); H03G 5/165 (2013.01); H04R 3/00 (2013.01); H04R 19/04 (2013.01); H04R 2201/003 (2013.01);
Abstract
A microphone device comprising a microelectromechanical systems (MEMS) acoustic sensors, an automatic gain compensation (AGC) component, and a direct current (DC) offset cancellation component is described. An microphone device can be configured for AGC of an analog gain stage or a digital gain stage associated with the MEMS acoustic sensor. Provided implementations can also be configured to compensate DC offset resulting from adjustment of the analog provided by the AGC component. Additional embodiments of the subject disclosure can provide digital frequency equalization and/or linearization.