Method and apparatus to increase audio band microphone sensitivity
US10616691B2 · kind B2 · utility
1Cited by
34References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2016 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Nov 11, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A microphone circuit having an amplifier with an input operably coupled to a microphone motor also includes a low pass filter operably coupled to the output of the amplifier and a positive feedback network that operably couples to an output of the low-pass filter and to the amplifier input. For many useful application settings the aforementioned amplifier has unity gain while the positive feedback network has a fractional gain less than unity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.