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:
Nov. 24, 2015
Filed:
Mar. 04, 2011
Applicant:
Dennis Mortensen, Frederiksberg C, DK;
Inventor:
Dennis Mortensen, Frederiksberg C, DK;
Assignee:
EPCOS AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 9/08 (2006.01); H04R 19/04 (2006.01); H04R 19/00 (2006.01); B81C 3/00 (2006.01);
U.S. Cl.
CPC ...
H04R 19/04 (2013.01); B81C 3/004 (2013.01); H04R 19/005 (2013.01); B81B 2201/0257 (2013.01); B81C 2203/051 (2013.01);
Abstract
A microphone includes two backplates. A membrane is located between the two backplates. A voltage source applies a first bias voltage to the membrane and the first backplate and applies a second bias voltage to the membrane and the second backplate. A control unit adjusts the first and the second bias voltage. A method to center the membrane in a final electro-mechanic equilibrium position between the two backplates in a microphone is also disclosed.