Method and apparatus for performing singularity detection aided calibration on time-interleaved analog-to-digital converter

Abstract

A calibration apparatus includes a calibration circuit and a singularity detection (SD) circuit. The calibration circuit performs a calibration process upon a time-interleaved analog-to-digital converter (TI-ADC) with a plurality of TI channels, wherein the calibration process includes detecting and correcting mismatch between different TI channels of the TI-ADC. The SD circuit sets an SD flag by evaluating variation of statistical characteristics of an ADC input signal between different TI channels of the TI-ADC, and outputs the SD flag to the calibration circuit, wherein the calibration circuit controls the calibration process according to the SD flag.

Dependencies are inferred from the claim text.