DELAYED LOCKED LOOP REDUCING CURRENT CONSUMPTION

摘要

PURPOSE: A delayed locked loop is provided to reduce current consumption y by deactivating a part of the delayed locked loop configuration after completion of locking operation.;CONSTITUTION: A delay unit (310) generates an output clock by delaying an input clock. A replica delay unit (320) generates a feedback clock by delaying the output clock. A phase comparison unit (330) compares phase between the input clock and feedback clock. If phase difference between the input clock and feedback clock is less than a first value, a first fixing signal generation unit (340) activates a first fixing signal. A control unit (360) controls a delay value of the delay unit in response to the compared result of the phase comparison unit and maintains the delay value of the delay unit when a second fixing signal is activated.;COPYRIGHT KIPO 2013;[Reference numerals] (310) Delay unit; (320) Replica delay unit; (330) Phase comparison unit; (340) First fixing signal generation unit; (350) Second fixing signal generation unit; (360) Control unit