Current switching cell for digital to analog converter
US6559784B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Nov 21, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/742
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current switching cell for a multi-cell DAC, each cell having a data input and an analog output and including a current switching circuit having a current node; a current definition circuit for providing current to the current switching circuit at the current node; the current definition circuit having a parasitic coupling between the input and the current node; a driver circuit responsive to a data input for actuating the current switching circuit to provide an analog output from the current from the current definition circuit; and a control circuit responsive to at least one common control signal for controlling the current definition circuit and isolating the parasitic coupling between the current node and the common control signal; the driver circuit may also have a parasitic coupling between its driver input and the current node and the control circuit may isolate the parasitic coupling between the current node and the driver input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.