Power reduction technique for current mode digital-to-analog converters
US5635935A · kind A · utility
5Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Aug 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/742
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A video DAC for driving video displays with reduced power dissipation is presented. This is accomplished using a dual driver circuit connected to a current mirror, the dual driver comprising a strong driver and a weak driver. The dual driver permits switching current between the video load and a dummy load. The current to the dummy load is disabled during periods when the video signal remains steady for a predetermined period of time. The dual driver, using the weak driver, disables the current to the dummy load during video blanking and synchronization periods. This scheme substantially reduces the power dissipation in the DAC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.