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:
Dec. 27, 2011
Filed:
Dec. 14, 2007
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 an input buffer circuit. The input buffer circuit includes an integrated circuit including a floating ground substrate and a p-n junction. The p-n junction is coupled as a capacitor to a filter circuit of the input buffer circuit.