A calibration scheme for imperfect quantizers

This paper considers the calibration of imperfect quantizers, or analog-to- digital converters (ADCs), We present a method working purely in the digita l domain, suitable e.g., for calibration of ADCs from output data only. The proposed method is based on a linear-filter reconstruction of an analog ca libration signal. The reconstructed version of the calibration signal is em ployed in designing an updated quantization table, with the aim of improvin g the overall performance. Experiments demonstrate gains in terms of spurio us-free dynamic range and signal-to-noise and distortion ratio (SNDR).