A differential-ring-oscillator with up to 35 dBc/Hz phase noise improving amplitude feedback loop for ultra low power systems

Peter Toth, Hiroki Ishikuro

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

    Abstract

    This work presents a novel idea to dynamically control a differential ring oscillators biasing in order to improve the phase noise performance in the ultra low power domain. This proposed feedback system can be flexibly applied on any type of fully-differential ring oscillator with a tail current source. The following paper covers theoretical and simulative considerations to prove the feasibility of this idea. Finally measurements of a 180 nm standard CMOS integrated prototype system depict the implementability of this idea. A phase noise improvement of up to 35 dBc/Hz can be observed with an active control loop. Moreover, the tuning range of the implemented ring oscillator is extended by 434% in contrast to fixed bias operation. These values are measured at a minimum oscillation power consumption of 55 pW/Hz.

    Original languageEnglish
    Title of host publication2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages350-353
    Number of pages4
    ISBN (Electronic)9781728109961
    DOIs
    Publication statusPublished - 2019 Nov
    Event26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019 - Genoa, Italy
    Duration: 2019 Nov 272019 Nov 29

    Publication series

    Name2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019

    Conference

    Conference26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
    CountryItaly
    CityGenoa
    Period19/11/2719/11/29

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Control and Optimization
    • Computer Networks and Communications
    • Hardware and Architecture

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  • Cite this

    Toth, P., & Ishikuro, H. (2019). A differential-ring-oscillator with up to 35 dBc/Hz phase noise improving amplitude feedback loop for ultra low power systems. In 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019 (pp. 350-353). [8964847] (2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICECS46596.2019.8964847