High volume expander circuit
US6172561A · kind A · utility
4Cited by
8References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Sep 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G7/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a circuit for performing volume expansion on an audio signal. The circuit includes an amplifier that has an input side and an output side. Further, the amplifier amplifies the audio signal at a first amplification to produce an amplified signal at the output side of the amplifier. The circuit also includes a shunting element coupled across the input side and output side of the amplifier. The shunting element includes a variable impedance device for changing the first amplification of the amplifier to a second amplification if the amplified signal reaches a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.