DLL circuit and method of controlling the same

Details DLL circuit and method of controlling the same DLL circuit and method of controlling the same

2011-03-22

2011-03-22

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S158000

Reexamination Certificate

active

07911246

ABSTRACT:
A DLL circuit includes a clock selection control unit configured to generate a clock selection signal on the basis of a phase difference between a reference clock and a feedback clock and, after the clock selection signal is generated, to generate an initialization signal. A delay control unit, when the initialization signal is enabled, transfers an initial voltage to be generated by dividing an external power supply voltage to a delay unit as a control voltage, and controls a delay operation of a delay reference clock to be selected on the basis of the clock selection signal.

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