Delay-locked loop device and operation method therefor

Abstract

A DLL device and an operation method for the DLL device are provided. The DLL device includes a delay line, a replica circuit, a phase detector, and a delay controller. The delay line delays an input clock in response to a delay code to provide a delayed clock. The replica circuit generates a feedback clock according to the delayed clock. The phase detector compares the input clock with the feedback clock to generate a delay control signal. The delay controller generates the delay code at a first time point according to the delay control signal based on a control clock and delays a replica delay time length to provide the delay code to the delay line at a second time point. The delay line adjusts the input clock at the second time point. A cycle of the control clock is adjusted to be larger than the replica delay time length.