Current-time digital-to-analog converter
US7764213B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2008 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Jul 1, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/82
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high resolution digital-to-analog converter comprises a programmable n-bit current digital-to-analog converter (IDAC), an m-bit programmable counter/timer, an integrator that converts the IDAC constant current charging a capacitor over time into an a precision (high resolution) analog voltage, and a sample and hold circuit for storing the precision analog voltage. The constant current from the IDAC is applied to the integrator for a time period determined by the programmable counter/timer, then the sample and hold circuit will sample the final voltage on the capacitor and store it as an analog voltage. The analog voltage resolution of this high resolution digital-to-analog converter is n+m bits or binary 2n+m. In addition, a plurality of sample and hold circuits may be utilized for maintaining a plurality of analog output voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.