CALIBRATION OF A TIME-INTERLEAVED ANALOG-TO-DIGITAL CONVERTER (ADC) CIRCUIT

摘要

Examples are provided for a method and apparatus for calibration of an analog-to-digital converter (ADC). The method includes selecting a reference sub-ADC from multiple sub-ADCs. A calibration signal is sent to an input node of each sub-ADC of the sub-ADCs. For each sub-ADC, other than the reference sub-ADC, a corresponding error signal is generated based on output signals of the sub-ADC and the reference sub-ADC. Each sub-ADC is calibrated based on the corresponding error signal. The ADC may be a time-interleaved ADC that includes the plurality of sub-ADCs, and the reference sub-ADC has a lowest relative offset among the sub-ADCs.