Delay compensation circuit providing various and precious delay time

摘要

PURPOSE: A delay compensation circuit is provided which can offer various and minute delay time. CONSTITUTION: In a delay synchronization loop providing a delayed advanced clock signal through a delay compensation circuit(20) by inputting a reference clock signal and according the phases of the reference clock signal and the advanced clock signal, the delay compensation circuit(20) comprises a number of delay stages(21,23,25,27) where at least above two delay devices are connected each other in parallel, and a number of switching parts(22,24,26,28) dividing the delay time by selecting one of the delay devices between the delay stages. The delay devices have different delay times respectively, and the delay time is determined by selecting the connection of the delay devices.