Optimum Digital Filter for High-Performance All-Digital Phase-Locked Loop

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Abstract:

The effect of all-digital phase-locked loop (ADPLL) digital filter parameters on the jitter is investigated in time domain, and a systematic design procedure for ADPLL is presented. The pro-posed method not only estimates the output jitter of an ADPLL, but also finds the optimal filter pa-rameter minimizing the overall ADPLL timing jitter. To verify the theoretic analysis, an ADPLL behavior model in matlab is designed. The simulation shows significant performance improvement on the timing jitter.

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587-592

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June 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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