Systems and methods for adaptive auto-calibration of Radix<2 A/D SAR converters with internally generated stimuli
US6486806B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Sep 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/804
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An auto-calibrating companion bit successive approximation system uses sampling and balancing capacitors in a charge redistribution digital-to-analog converter having multi-valued capacitors of magnitudes enabling redundant expression of electric charge values. Companion bits are used with sets of balancing capacitors for successive approximation of sampling voltages. A charge redistribution digital-to-analog converter has a sampling and balancing capacitors including associated companion bit capacitors represented by digital weights which are saved in memory. A non-binary weighted set of capacitors provides redundancy in a charge redistribution digital-to-analog converter employed in a successive approximation register architecture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.