Signal delay circuit using charge pump circuit.

摘要

A delay circuit (141) delays an input signal (IN) having a predetermined frequency by a time corresponding to a control signal. A delay amount detector (142) detects a signal delay amount of the delay circuit (141). A charge pump circuit (143) generates a DC voltage corresponding to a pulse width ratio between the input signal and a detection signal of the delay amount detector. This DC voltage is fed back to the delay circuit (141) as a control signal.