High resolution digital-to-analog converter
US4410879A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1980 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Oct 31, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/68
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for expanding the resolution of digital-to-analog converters is described. Two limited resolution digital-to-analog converters are cascaded in such a manner that one converts the low order bits of digital input signal and the other converts the higher order bits. The output of the higher order digital-to-analog converter is applied directly to a summing circuit while the output of the low order digital-to-analog is first passed through an attenuator. When the low order digital-to-analog converter receives all logical ones, a carry is performed to the higher order digital-to-analog converter. The low order analog-to-digital converter is then reset by a successive approximation technique. Operation is essentially the same for borrow operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.