A 4mW wide bandwidth ring-based fractional-n DPLL with 1.9psrms integrated-jitter

Ahmed Elkholy, Saurabh Saxena, Romesh Kumar Nandwana, Amr Elshazly, Pavan Kumar Hanumolu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, a ring oscillator based fractional-N DPLL that achieves low jitter by extending bandwidth using noise cancellation techniques is presented. A dual-path digital loop filter architecture is employed to resolve the ΔΣ DAC quantization noise challenge. Fabricated in 65nm CMOS process, the proposed PLL operates over a wide frequency range of 4GHz-5.5GHz and achieves 1.9psrms jitter while consuming only 4mW. The measured in-band phase noise is better than -96 dBc/Hz at 1MHz offset. The proposed FNDPLL achieves wide bandwidth up to 6MHz using a 50 MHz reference. The FoM is -228.5dB, which is at least 20dB better than all reported ring-based FNDPLLs.

Original languageEnglish (US)
Title of host publication2015 IEEE Custom Integrated Circuits Conference, CICC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479986828
DOIs
StatePublished - Nov 25 2015
EventIEEE Custom Integrated Circuits Conference, CICC 2015 - San Jose, United States
Duration: Sep 28 2015Sep 30 2015

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2015-November
ISSN (Print)0886-5930

Other

OtherIEEE Custom Integrated Circuits Conference, CICC 2015
CountryUnited States
CitySan Jose
Period9/28/159/30/15

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Keywords

  • DCO
  • DPLL
  • DTC
  • Fractional-N
  • TDC
  • fractional divider
  • jitter
  • ring VCO
  • time amplifier

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Elkholy, A., Saxena, S., Nandwana, R. K., Elshazly, A., & Hanumolu, P. K. (2015). A 4mW wide bandwidth ring-based fractional-n DPLL with 1.9psrms integrated-jitter. In 2015 IEEE Custom Integrated Circuits Conference, CICC 2015 [7338376] (Proceedings of the Custom Integrated Circuits Conference; Vol. 2015-November). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC.2015.7338376