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:
Apr. 07, 2020
Filed:
Nov. 11, 2016
Applicant:
Knowles Electronics, Llc, Itasca, IL (US);
Inventors:
Dean Badillo, Schaumburg, IL (US);
Michael Jennings, Plano, TX (US);
Assignee:
Knowles Electronics, LLC, Itasca, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 19/00 (2006.01); H04R 3/06 (2006.01); H04R 29/00 (2006.01); H04R 19/04 (2006.01);
U.S. Cl.
CPC ...
H04R 19/04 (2013.01); H04R 3/06 (2013.01); H04R 29/004 (2013.01); H03F 2200/03 (2013.01); H04R 2410/03 (2013.01);
Abstract
A microphone circuit having an amplifier with an input operably coupled to a microphone motor also includes a low pass filter operably coupled to the output of the amplifier and a positive feedback network that operably couples to an output of the low-pass filter and to the amplifier input. For many useful application settings the aforementioned amplifier has unity gain while the positive feedback network has a fractional gain less than unity.