Methods and apparatus for offline mismatch removal in sigma delta analog-to-digital converters
US9246509B1 · kind B1 · utility
2Cited by
5References
24Claims
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Key dates
| Filing date | Sep 2, 2014 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Sep 2, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sigma delta analog-to-digital converter includes a sigma delta modulator including a segmented digital-to-analog converter (DAC), the segmented DAC including a coarse DAC and a fine DAC, wherein the sigma delta modulator is configured to generate a coarse quantized signal and a fine quantized signal; recombination logic configured to combine the coarse quantized signal and the fine quantized signal; and a calibration circuit, operable in a calibration mode, to calibrate the recombination logic to compensate for mismatch between the coarse DAC and the fine DAC of the segmented DAC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.