Processing chip for a digital microphone and related input circuit and a digital microphone
US9008332B2 · kind B2 · utility
1Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2011 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Oct 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A processing chip for a digital microphone and related input circuit and a digital microphone are described herein. In one aspect, the input circuit for a processing chip of a digital microphone includes: a PMOS transistor, a resistor, a current source, and a low-pass filter. The described processing chip possesses high anti high-frequency interference capabilities and the described input circuit possesses high high-frequency power supply rejection ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.