Digital-to-analogue converter
US7619553B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2005 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Oct 21, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/662
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analogue conversion arrangement is disclosed which includes first and second groups of the same number of bi-directional bufferless digital-to-analogue converters. The output of at least one converter in each group is connected to a respective capacitive load (CLOAD, CLOAD′). During a calibration phase of operation the converter inputs receive first and second different codes representing the same output level. The arrangement also includes a respective switched capacitor network connected to each converter output, a comparator for comparing the output voltages of the first and second groups, and a control circuit. The control circuit controls the capacitor networks in response to the comparator so as to make the output voltages of the first and second groups substantially equal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.