Monotonic current/resistor digital-to-analog converter and method of operation
US5243347A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1992 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Sep 28, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/765
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analog converter (10) performs two distinct conversions (12,59) of most significant bits (MSBs) and least significant bits (LSBs), respectively, of a digital input signal and uses the conversion results to provide an equivalent analog output. A plurality of current sources (34-36) is controlled by a thermometer code equivalent value of the most significant bits to provide a first input current to an output stage (22). A plurality of resistors (60-63) is controlled by a binary to `one of` equivalent of the least significant bits to provide a second input current to the output stage. The output stage (22) converts a combination of the first and second input currents to the analog output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.