System and method for adjusting microphone functionality
US9451358B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Dec 9, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adjustable microphone. The microphone includes a MEMS microphone, a charge pump, a preamplifier, a first analog-to-digital converter, a root mean square (RMS) power detector, and a logic circuit. The MEMS microphone is configured to provide a signal indicative of sound detected by the MEMS microphone. The charge pump provides a bias voltage to the MEMS microphone. The preamplifier receives the signal from the MEMS microphone, and outputs an amplified signal indicative of sound detected by the MEMS microphone. The first analog-to-digital converter receives the amplified signal and converts the amplified signal to a digital signal. The root mean square power detector is configured to detect a power level of the amplified signal and output an indication of the power of the amplified signal. The logic circuit receives the RMS power detector output and a control input, and adjusts the operation of the microphone based on the control input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.