Method and apparatus for controlling an audio signal level
US6127893A · kind A · utility
19Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Sep 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0088
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit for controlling a level of an audio signal and transmitting the signal to an amplifier is described. The control circuit is based on an R-2R resistor network having a plurality of resistor nodes. A plurality of switches alternately connects each of the plurality of resistor nodes to one of a plurality of low impedance nodes and a low impedance input node associated with the amplifier. Switch control circuitry selectively controls the plurality of switches to transmit the audio signal to the low impedance input node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.