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. 19, 2023
Filed:
Dec. 13, 2020
Applicants:
Guanghua Wu, Dublin, CA (US);
Xingshuo Lan, San Jose, CA (US);
Zhixiong Xiao, Fremont, CA (US);
Inventors:
Assignee:
GMEMS TECH SHENZHEN LIMITED, Shenzhen, CN;
Primary Examiner:
Int. Cl.
CPC ...
H04R 19/04 (2006.01); H04R 31/00 (2006.01);
U.S. Cl.
CPC ...
H04R 31/00 (2013.01); H04R 19/04 (2013.01); H04R 2201/003 (2013.01); H04R 2410/03 (2013.01);
Abstract
The present invention provides a capacitive microphone such as a MEMS microphone with two capacitors. The signal output from the first capacitor is additive inverse of that from the second capacitor, and a total signal output is a difference between the two outputs. In at least one of the two capacitors, a movable or deflectable membrane/diaphragm moves in a lateral manner relative to the fixed capacitor plate, instead of moving toward/from the fixed plate. The squeeze film damping, and the noise are substantially avoided, and the performances of the microphone is significantly improved.