PHASE SYNCHRONIZATION LOOP CIRCUIT, AND DATA RECOVERY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a phase synchronization loop circuit that can reduce a processing time required for initial adjustment of a data recovery device and to provide the data recovery device. SOLUTION: The data recovery device having two control functions of adjusting a phase of data and of duty adjustment is provided with a phase locked loop circuit 33; including an edge changeover means 4 for controlling a phase comparator 1 which selects a comparison result of only one edge of a leading edge of binary data or a trailing edge of the binary data or a comparison result of both of the leading and trailing edges and outputs the selected comparison result in the phase comparison between the binary data and a bit synchronization clock and implementing the phase comparison of one edge only for the phase adjustment.