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US07812654B2 Delay locked loop circuits and method for controlling the same 失效
延迟锁定环电路及其控制方法

Delay locked loop circuits and method for controlling the same
Abstract:
A delay locked loop circuit and a method for controlling the same including a delay locked loop (DLL) circuit for receiving an external clock signal and generating an internal clock signal synchronized to the external clock signal includes at least two delay chains having different types of delay cells for delaying the external clock signal. Thus, the layout area and power consumption can be reduced, and logic failures can be prevented or minimized by replacement or compensation of the main delay cells.
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