Apparatus and method for muting an output signal in a switching amplifier
US4673889A · kind A · utility
34Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Dec 16, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/3044
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an audio switching power amplifier, muting apparatus provided for eliminating noise signals associated with turn-on and turn-off operations of the apparatus is disclosed. The muting apparatus disables the output power amplifiers and controls signal levels at various positions in the power amplifier to reduce transient conditions. Control apparatus applies the muting signals to the power amplifier during a predetermined period during start-up of the amplifier and applies the muting conditions immediately upon the turning off of power to the power amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.