Transconductance compensation circuit having a phase detector circuit with cycle slipping recovery operation and method

摘要

A phase comparator for comparing the relative phase of a first input signal and a second input signal. The phase comparator detects a slipping condition, the slipping condition present if the first input signal leads the second input signal in phase and the first input signal is delayed for at least one cycle such that a first rising edge of the first input signal lags a first rising edge of the second input signal by greater than 180°. The phase detector resets at least one output of the phase comparator upon the detection of the slipping condition. Also described are circuits to implement the phase comparator and a transconductance compensation circuit for a filter, and methods of comparing phase and transconductance compensation.