Time skew calibration of time-interleaved analog to digital converters
US10483996B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2018 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | May 29, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1215
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus and associated methods relate to modulating polarity on sample outputs from a time-interleaved analog-to-digital converter (TIADC) as an input to a time skew extractor in a clock skew calibration control loop. In an illustrative example, a multiplier-mixer may impart a polarity change to every other data sample transmitted between the TIADC and the time skew extractor. In some examples, a multiplexer may select between the polarity modulated samples and non-polarity modulated samples before the multiplier-mixer. Selection between the polarity modulated samples and the non-polarity modulated samples may be based on, for example, determination of specific frequency bands of an analog input signal. Various embodiments may improve convergence of clock skew calibration control loops for analog input signals sampled with a TIADC near a Nyquist frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.