Method and apparatus of system offset calibration with overranging ADC
US6791484B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2003 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Jul 18, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/44
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for system offset calibration using an overranging ADC is provided. The overranging ADC is configured to convert an analog signal into an intermediary digital signal. The conversion range of the overranging ADC is extended beyond the full dynamic range of the ADC system. The intermediary digital signal has more bits than the digital output signal. A digital fine offset adjustment circuit is configured to provide the digital output signal by digitally subtracting a fine offset from the intermediary digital signal and decoding the intermediary digital signal. The digital output signal has approximately no offset, and has approximately no loss in dynamic range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.