Methods and apparatus for calibrating a regulated charge sharing analog-to-digital converter (ADC)
US10972115B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2020 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | May 15, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/806
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of operation in an analog-to-digital converter (ADC) includes performing a calibration operation. The calibration operation includes sampling an input analog reference voltage. A sequence of charge sharing transfers is then performed with a charge sharing regulator to transfer an actual amount of charge between a charge source and a charge load based on the input analog reference voltage. The transferred actual amount of charge is compared to a reference charge value corresponding to the reference voltage. A control input to the charge sharing regulator is adjusted to correspondingly adjust charge sharing of a subsequent amount of charge based on the comparing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.