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. 24, 2012
Filed:
Dec. 20, 2011
Applicant:
Michael Jennings, McKinney, TX (US);
Inventor:
Michael Jennings, McKinney, TX (US);
Assignee:
Knowles Electronics, LLC, Itasca, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 25/00 (2006.01); H01L 27/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A miniature electret microphone includes a housing, a back plate/diaphragm assembly, an integrated circuit and a filter circuit. The housing for the microphone includes a sound inlet port. The back plate/diaphragm assembly is disposed within the housing and the assembly has an output responsive to sound pressure incident on the diaphragm. The integrated circuit includes a floating ground substrate and a p-n junction disposed within the housing coupled to the output. The filter circuit is formed within the integrated circuit, the filter circuit including a capacitor formed by the p-n junction.