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US20100102861A1 DLL CIRCUIT AND CONTROL METHOD THEREOF 有权
DLL电路及其控制方法

DLL CIRCUIT AND CONTROL METHOD THEREOF
摘要:
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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