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. 09, 2019
Filed:
Oct. 23, 2017
Applicant:
Infineon Technologies Ag, Neubiberg, DE;
Inventors:
Assignee:
Infineon Technologies AG, Neubiberg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 3/00 (2006.01); H03H 17/04 (2006.01); H04R 3/00 (2006.01);
U.S. Cl.
CPC ...
H03M 3/496 (2013.01); H03H 17/0416 (2013.01); H03M 3/32 (2013.01); H03M 3/368 (2013.01); H04R 3/00 (2013.01); H04R 2201/003 (2013.01);
Abstract
In accordance with an embodiment, a digital microphone interface circuit includes a delta-sigma analog-to-digital converter (ADC) having an input configured to be coupled to a microphone, a digital lowpass filter coupled to an output of the delta-sigma ADC, and a digital sigma-delta modulator coupled to an output of the digital lowpass filter. The delta-sigma ADC, the digital lowpass filter, and the digital sigma-delta modulator are configured to operate at different sampling frequencies.