Apparatus for the muting of an audio power amplifier in a standby mode
US5029005A · kind A · utility
16Cited by
30References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1990 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Apr 25, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a television receiver apparatus is provided for muting an audio power amplifier having continuous operating supply voltage applied thereto from a standby power supply even when the receiver is in an "off" condition so that spurious noise and hum coupled to the power amplifier will not be amplified and heard by the viewer. The muting is applied via a microprocessor controller which controls and senses the power supply status of the receiver as well as mutes the power amplifier in both the "off" and the "on" conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.