Linear half-rate phase detector for clock recovery and method therefor

摘要

There is a clock recovery circuit to correct the timing relationship between a data signal and clock signal. The clock recovery circuit comprises a phase detector having an input for receiving a clock signal having a period, an input for receiving a data signal, and an input for receiving a window signal. The window signal has a period equal to the period of the clock signal and phase difference of -90° with respect to the clock signal. The phase detector generates an up output and a down output while maintaining a phase relationship of the up output and the down output in response to the phase relationship between the clock signal and the data signal.