Low-voltage driven, audio signal amplifying apparatus and a portable acoustic system using said apparatus
US5610555A · kind A · utility
15Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1995 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Aug 15, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/68
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The apparatus includes output stage amplifiers for receiving the respective outputs of preamplifiers provided in correspondence to the left and right channels in a stereo system. Negative feedback circuits are provided in the respective output stage amplifiers for reducing the amount of low-band negative feedback. Switch circuits are turned on in response to feedback signals from the respective negative feedback circuits for supplying the feedback signals at the input to the output stage amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.