Dll circuit and control method thereof

[0017]A DLL circuit according to an embodiment of the present invention outputs an input clock signal (CLKi in FIG. 1) as an output clock signal (CLKo in FIG. 1) via a variable delay circuit (reference numeral 12 in FIG. 1), and also, controls a delay amount in the variable delay circuit based on a phase comparison result between the input clock signal and output clock signal. The DLL circuit includes: a first phase comparing circuit (PD1 in FIG. 1) that compares the phases between the input clock signal and the output clock signal; a first delay circuit (DL1 in FIG. 1) that delays the output clock signal; and a second phase comparing circuit (PD2 in FIG. 1) that compares the phases between the input clock signal and an output signal of the first delay circuit. The DLL circuit is configured such that the delay amount in the variable delay circuit is controlled based on a comparison result of the first phase comparing circuit and a comparison result of the second phase comparing circuit