Microphone amplifier with digital gain control
US6239655A · kind A · utility
6Cited by
22References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Aug 2, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/001
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A remotely controlled microphone amplifier has a first amplifier stage with a variable gain circuit operatively connected in the overall feedback loop of the first stage for controlling the gain in first increments. A unity gain second amplifier stage has variable attenuator operatively coupled between the output of the first amplifier stage and the input of the second amplifier stage. The variable attenuator controls the input to the second stage in second increments less than the first increments. The overall gain is linearly adjustable and varies in equal increments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.