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. 14, 2020
Filed:
Feb. 07, 2019
Guanghua Wu, Pleasanton, CA (US);
Xingshuo Lan, San Jose, CA (US);
Yunlong Wang, San Ramon, CA (US);
Guanghua Wu, Pleasanton, CA (US);
Xingshuo Lan, San Jose, CA (US);
Yunlong Wang, San Ramon, CA (US);
GMEMS TECH SHENZHEN LIMITED, Shenzhen, CN;
Abstract
The present invention provides a capacitive microphone having a capability of acceleration noise cancelation. The microphone includes (1) a moveable functional membrane comprising a basic functional membrane with an area Ao; and (2) a moveable reference membrane comprising a basic reference membrane. The basic reference membrane has one or more holes through the membrane's thickness, and the moveable reference membrane would be identical to the moveable functional membrane if the basic reference membrane does not have said one or more holes. The total area of said one or more holes is Ah, and a hole density HD is defined as Ah/Ao (%), and HD is in the range of e.g. from 0.012% to 2.647%.