Abstract:A delay-locked loop (DLL) with wide-range operation and fixed latency of one clock cycle is proposed. This DLL uses a phase selection circuit and a start-controlled circuit to enlarge the operating frequency range and eliminate harmonic locking problems. Theoretically, the operating frequency range of the DLL can be from 1 ( max ) to 1 (3 min ), where min and max are the minimum and maximum delay of a delay cell, respectively, and is the number of delay cells used in the delay line. Fabricated in a 0.35-m sing… Show more
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