PHASE COMPARATOR AND CLOCK DATA REGENERATION CIRCUIT USING THE SAME

摘要

An identifying means generates a regenerative signal by identifying an input signal with the timing of a clock signal and outputs the regenerative signal with an adjustable phase. An error pulse generating means generates an error pulse signal having a pulse width corresponding to phase difference between the input signal and the regenerative signal output from the identifying means. A reference pulse generating means generates a reference pulse signal corresponding to the error pulse signal generated by the error pulse generating means and having a constant pulse width. A differential signal generating means generates a phase comparison signal indicating the results of phase comparison by taking difference between the error pulse signal and the reference pulse signal. A phase adjusting means adjusts the phase with which the identifying means outputs the regenerative signal.