A 13.6-17.7 GHz Sub-Harmonic Injection-Locked SSPLL with 74-fs RMS Jitter

Yuri Lu, Chunqi Shi, Leilei Huang, Runxi Zhang, Hao Deng, Jinghong Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a sub-harmonic injection-locked sub-sampling PLL (SIL-SSPLL) that realizes a peaking-free jitter transfer. The use of an injection-locked oscillator (ILO) in SSPLL allows the PLL open-loop transfer function to achieve a higher phase margin, thereby enhancing the jitter performance. The study also analyzes the effects of injection locking strength on noise rejection for both the reference signal and the VCO showing that optimal jitter performance can be achieved by properly setting the injection strength. A 13.6 to 17.7 GHz SIL-SSPLL prototype fabricated in a 40 nm CMOS technology demonstrates 74 fs RMS integrated jitter at 15.8 GHz while consuming 22.6 mW of power, leading to an excellent figure of merit (FoM) of -249.1 dBc/Hz.

Original languageEnglish
Title of host publicationISCAS 2025 - IEEE International Symposium on Circuits and Systems, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350356830
DOIs
StatePublished - 2025
Event2025 IEEE International Symposium on Circuits and Systems, ISCAS 2025 - London, United Kingdom
Duration: 25 May 202528 May 2025

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310

Conference

Conference2025 IEEE International Symposium on Circuits and Systems, ISCAS 2025
Country/TerritoryUnited Kingdom
CityLondon
Period25/05/2528/05/25

Keywords

  • PLL
  • injection-locked PLL
  • injection-locked oscillator
  • phase noise
  • sub-sampling PLL

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