Signal amplification circuit and process for neutralizing noise from a power supply voltage
US6842525B1 · kind B1 · utility
6Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 2000 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Jan 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An amplification circuit is provided for the signal output from a microphone in which the signal is amplified by a differential structure amplifier. The circuit includes the pull-up voltage, which initializes the operating state of the microphone, being coupled to a first input of the differential structure amplifier and to a second input of the differential structure amplifier through a pull-up resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.