DLL circuit and control method thereof

Details DLL circuit and control method thereof DLL circuit and control method thereof

2009-10-22

2011-10-11

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S149000

Reexamination Certificate

active

08035432

ABSTRACT:
A DLL circuit includes a first phase comparing circuit that compares phases between an input clock signal and an output clock signal, a first delay circuit that delays the output clock signal, and a second phase comparing circuit that compares phases between the input clock signal and an output signal of the first delay circuit. A 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.

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