An Accurate, Sensitive, and Wide-range Skew Calibration Method for Transmitter with Segmented Modulator Using Probability-maintained Multi-notch Sequence

Probability-maintained multi-notch sequence is proposed for skew calibration in segmented modulator. For fine calibration, the sensitivity is 4 times that of conventional method. The estimation error of coarse calibration that covers 0.5-3 UI is only 0.023 UI.