Low voltage, single power supply operated digital analog converter
US4644325A · kind A · utility
10Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Oct 21, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/745
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital to analog converter circuit includes a current supply for providing a plurality of output currents of substantially equal magnitudes, a subtractor circuit coupled with selective outputs of the current supply for producing a plurality of binary weighted output currents and a summing circuit which is responsive to a binary coded digital input signal for selectively summing the binary weighted output currents and the remaining equal magnitude currents to provide a representative analog output current. The converter circuit is suited to be operated from a single source of power supply and does not require resistor trimming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.