Use of microphone capacitance as a switched capacitor in an input network of a delta-sigma modulator
US9332345B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2014 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | May 21, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/04
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In accordance with embodiments of the present disclosure, a method and apparatus for providing a digitized microphone signal to a digital processing device may include an analog signal path portion, a digital signal path portion, and a control circuit. The analog signal path portion may have an audio input configured to receive an analog input signal indicative of audio sounds incident upon an audio transducer. The digital signal path portion may have an analog-to-digital converter for converting the analog microphone signal to the digitized microphone signal. The control circuit may be configured to control a magnitude of the analog input signal or a derivative thereof in order to reduce audio distortion occurring in either or both of the analog signal path portion and the digital signal path portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.