Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
Volume 66, Issue 10, Pages 3775-3785Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSI.2019.2918027
Keywords
MDLL; multiplying delay-locked loop; realigned oscillator; time-variant modeling; injection-locking; discrete-time model; spectrum folding; aliasing; multirate systems; multiplexed ring-oscillator
Categories
Funding
- Intel Corporation
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This paper presents a novel time-variant model of multiplying delay-locked loops. A simple feed-forward model of the multiplexed ring oscillator mathematically describes the edge realignment process and, by providing an explicit tuning input, allows to be embedded into the time-variant multiplying delay-locked loop model without requiring approximations. Verification of the multiplexed ring oscillator model against detailed circuit simulations is presented. Closed-form expressions for the multiplying delay-locked loop phase noise, as a function of the system parameters and noise sources, are provided.
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