Sigma-delta analog-to-digital converter circuit with real time correction for digital-to-analog converter mismatch error
US11522553B2 · kind B2 · utility
1Cited by
23References
35Claims
0Family size
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Key dates
| Filing date | May 3, 2021 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | May 3, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/462
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An estimate of unit current element mismatch error in a digital to analog converter circuit is obtained through a correlation process. Unit current elements of the digital to analog converter circuit are actuated by bits of a thermometer coded signal generated in response to a quantization output signal. A correlation circuit generates the estimates of the unit current element mismatch error from a correlation of a first signal derived from the thermometer coded signal and a second signal derived from the quantization output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.