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, 2022
Filed:
Jun. 19, 2020
Applicant:
Knowles Electronics, Llc, Itasca, IL (US);
Inventors:
Michael Jennings, McKinney, TX (US);
Dean Badillo, Schaumburg, IL (US);
Assignee:
Knowles Electronics, LLC, Itasca, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/22 (2006.01); G01R 27/26 (2006.01); B81B 3/00 (2006.01); H03F 1/26 (2006.01); H03F 3/187 (2006.01); H03F 3/21 (2006.01); H03F 3/213 (2006.01); H04R 3/00 (2006.01);
U.S. Cl.
CPC ...
G01R 27/2605 (2013.01); B81B 3/0021 (2013.01); H03F 1/26 (2013.01); H03F 3/187 (2013.01); H03F 3/211 (2013.01); H03F 3/213 (2013.01); H04R 3/00 (2013.01); B81B 2201/0257 (2013.01); B81B 2201/0264 (2013.01); H03F 2200/03 (2013.01); H03F 2200/219 (2013.01); H03F 2200/372 (2013.01);
Abstract
A sensor assembly including a capacitive sensor, like a microelectromechanical (MEMS) microphone, and an electrical circuit therefor are disclosed. The electrical circuit includes a first transistor having an input gate connectable to the capacitive sensor, a second transistor having an input gate coupled to an output of the first transistor, a feedforward circuit interconnecting a back-gate of the second transistor and the output of the first transistor, and a filter circuit interconnecting the output of the first transistor and the input gate of the second transistor.