Single-supply digital-to-analog converter for control function generation
US4990916A · kind A · utility
12Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1990 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jan 30, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/785
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A converter for producing the function V.sub.out =V.sub.bias =V.sub.swing (1-2D), in which a DAC is combined with an operational amplifier and (typically) three or four resistors. A function of the voltage V.sub.swing, or a current corresponding thereto, is applied to the reference voltage input terminal of the DAC. The variable D is the DAC's digital input code, expressed as a decimal or fraction in the range between 0 and 1. The DAC output provides a suitably scaled and signed signal which is added to or subtracted from the offset signal V.sub.bias to produce V.sub.out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.