Digital to analog converter
US7889104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2009 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Jun 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/742
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital to analog converter (DAC) converting a digital code to an output voltage and capable of self calibration. The DAC includes a self-calibration signal generator generating a self-calibration signal based on the output voltage, a constant current generator, a first and a second current provider and a current-voltage converter. The current generating elements of the first and second current providers provide proportional currents, and are enabled/disabled according to the self-calibration signal and the digital code, respectively. The constant current is divided into the actual working current generating elements of the first current provider, and an output current is generated by the actual working current generating elements of the second current provider. The output current is converted to the output voltage by the current-voltage converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.