Digital to analog converter with complementary true current outputs
US4092639A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1976 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Jan 6, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/745
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital to analog converter is disclosed wherein two current outputs are provided, one the complement of the other. The digital to analog converter includes a novel two branched, symmetric, transistor switching circuit as well as an improved electrical n-bit weighting network which has ports for communicating weighted signal segments to connected transistor switching circuits. Logic inputs to the switching circuits determine whether an output signal is to be supplied in a first output summing line or a second, complementary, output summing line, both of which have high output impedance and high output voltage compliance which defines true current output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.