Phase interpolator with noise immunity

摘要

A phase interpolator with noise immunity. The phase interpolator includes a voltage-to-current conversion circuit that receives a differential voltage and generates a differential current. The differential current is mirrored and provided to a phase Max/Min detector circuit and current switches. The phase Max/Min detectors may generate signals for a phase selector circuit. The current switches provide the mirrored current to a phase comparator and a load circuit in response to input vectors and a quadrant select signal. The phase comparator generates output waveforms from the phase interpolator.