DELAY LOCKED LOOP CIRCUIT AND DELAY LOCK METHOD

摘要

PURPOSE: A delay locked loop circuit and a delay locked method capable of re-locking and locking speed are provided to perform locking and re-locking operation and minimize noise and jitter by using a control method of a delay line. CONSTITUTION: A delay locked loop circuit and a delay locked method capable of re-locking and locking speed includes a phase detector(200), a code generator(300), and a controlling current delay line. The phase detector outputs the phase difference sensing signal and detects the phase difference of the reference clock and feedback clock. The code generator outputs digital code according to the phase difference sensing signal.