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A 0.5–9.5-GHz, 1.2- \mu \text Lock-Time Fractional-N DPLL With ±1.25%UI Period Jitter in 16-nm CMOS for Dynamic Frequency and Core-Count Scaling
A phase-locked loop (PLL) architecture is proposed for improved efficiency of power and thermal management techniques in system-on-chips (SoCs). PLL architecture introduces two techniques: a dual-stage phase-acquisition loop filter that enables fast lock time of 1.2 μs without any frequency overshoo...
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Published in: | IEEE journal of solid-state circuits 2017-01, Vol.52 (1), p.21-32 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | A phase-locked loop (PLL) architecture is proposed for improved efficiency of power and thermal management techniques in system-on-chips (SoCs). PLL architecture introduces two techniques: a dual-stage phase-acquisition loop filter that enables fast lock time of 1.2 μs without any frequency overshoots and a nonlinear DCO that enables a wide frequency range of 0.5-9.5 GHz and a low period jitter of ±1.25%UI p-p with a single wideband tuning. With this proposed PLL architecture, SoC can continue its operation without any interruption caused by frequency overshoots during power and thermal management techniques like dynamic core-count scaling and dynamic voltage frequency scaling. The PLL achieves 0.45 ps rms period jitter at 3.25 GHz in fractional-N mode operation, while consuming a total power of 7.1 mW. |
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ISSN: | 0018-9200 1558-173X |
DOI: | 10.1109/JSSC.2016.2626338 |