Interleaved analog to digital converter with digital equalization
US8537044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2012 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Dec 28, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1215
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An interleaved analog to digital converter with digital equalization includes a conversion-measurement-equalization unit and residual distortions reduction unit, and is operative in a calibration mode and converter mode. The conversion-measurement-equalization unit includes a composite ADC containing N sub-ADCs, equalizer, responses measurement unit and a coefficients calculator. The residual distortions reduction unit uses received measured frequency responses and equalizer coefficients, both from the conversion-measurement-equalization unit, as a base to calculate corrected frequency responses that are applied to the coefficients calculator for generation of equalizer coefficients for application to the equalizer. A residual distortions calculator of the residual distortions reduction unit, is responsive to measured frequency responses from the composite ADC and a current set of equalizer coefficients applied to the equalizer, to calculate residual frequency distortions that should have been expected to appear in the output signal of the ADC system if the current equalizer coefficients remain applied to the equalizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.