TIME/DIGITAL CONVERTER, SYNCHRONIZING CIRCUIT AND METHOD USING THE SAME

摘要

PURPOSE: There is provided a synchronizing circuit for minimizing a phase difference between a reference clock signal and an inner clock signal, and a time/digital converter used for minimizing the phase difference. CONSTITUTION: A time/digital converter(211) includes first and second delay chains for delaying one of two input signals by a predetermined time interval. This time/digital converter also has first and second phase comparators for comparing the phase of the delayed signal with that of the other signal to generate a digital signal. A synchronizing loop converts a phase difference between a feedback signal and an inner clock signal into a delay control signal group using the time/digital converter. The delay control signal group controls the amount of delay of a delay reflecting circuit(207) to minimize the phase difference between the feedback signal and the inner clock signal rapidly.