Amplifier circuit for electret microphone with enhanced performance
US6580797B1 · kind B1 · utility
13Cited by
15References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1999 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Jun 18, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for connecting an electret microphone to audio inputs. The circuit includes a coupling circuit for accepting DC bias voltage from the audio inputs and providing audio signal to the inputs. Frequency shaping circuitry is provided for reducing unwanted microphone sensitivity at selected frequencies. In one aspect of the invention a battery connector is provided where at least one battery may be optionally connected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.