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:
Sep. 22, 2015
Filed:
Nov. 09, 2012
Applicant:
Invensense, Inc., San Jose, CA (US);
Inventors:
Fang Liu, Wobum, MA (US);
Kuang L. Yang, Newton, MA (US);
Assignee:
INVENSENSE, INC., San Jose, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 1/04 (2006.01); H04R 19/04 (2006.01); H04R 7/20 (2006.01); H04R 3/00 (2006.01); H04R 31/00 (2006.01); B81B 3/00 (2006.01); H04R 19/00 (2006.01); H04R 1/28 (2006.01); H04R 7/06 (2006.01);
U.S. Cl.
CPC ...
H04R 19/04 (2013.01); B81B 3/0056 (2013.01); H04R 3/005 (2013.01); H04R 7/20 (2013.01); H04R 31/006 (2013.01); B81B 2201/0221 (2013.01); B81B 2201/0257 (2013.01); H04R 1/2807 (2013.01); H04R 7/06 (2013.01); H04R 19/005 (2013.01);
Abstract
A microphone system has two diaphragms and are mechanically interconnected such that they respond in antiphase to an acoustic signal impinging on one of the diaphragms. The two diaphragms produce two variable capacitances that vary proportionately but inversely to one another. Voltage signals produced by the two variable capacitances are summed to provide an output signal proportional to the acoustic signal, but with greater sensitivity than a single-diaphragm microphone.