High accuracy digital-to-analog converter having symmetrical current source switching
US4695826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Apr 7, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/742
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analog converter includes a plurality of constant current sources (401-407) arrayed in a prescribed order and connected with a grounding lead wire (70). The respective constant current sources (401-407) are selectively connected to a first bus (303) by corresponding switches (501-507), respectively. A decoder (2) outputs switching signals to the switches (501-507). The switching signals are outputted from the decoder (2) to the switches (501-507) so that the constant current sources symmetrically positioned with respect to the center of an array of the plurality of constant current sources (401-407) are sequentially connected to the first bus (303). Thus, the digital-to-analog converter is improved in linearity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.