A low-power wide-band digital frequency synthesizer for cognitive radio sensor units

Liangge Xu*, Kari Stadius, Jussi Ryynänen

*Corresponding author for this work

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

    7 Citations (Scopus)

    Abstract

    This paper presents the design of a wide-band digital frequency synthesizer for cognitive radio sensor units. It is based on an all-digital phase-locked loop, and employs a digitally controlled ring oscillator with an LC tank introduced to extend tuning range and reduce power dissipation. Adaptive frequency calibration based on binary search is used for fast frequency settling. Fabricated in a 65-nm CMOS, the frequency synthesizer has an active area of 0.3 mm 2 and achieves a frequency tuning range of 2.7 to 6.1 GHz, with power consumption less than 22 mW from a 1.2-V supply. Measured phase noise at 6-GHz frequency is -92 dBc/Hz at 1-MHz offset.

    Original languageEnglish
    Title of host publicationESSCIRC 2009 - Proceedings of the 35th European Solid-State Circuits Conference
    Pages184-187
    Number of pages4
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA4 Article in a conference publication
    EventEuropean Solid-State Circuits Conference - Athens, Greece
    Duration: 14 Sep 200918 Sep 2009
    Conference number: 35

    Conference

    ConferenceEuropean Solid-State Circuits Conference
    Abbreviated titleESSCIRC
    CountryGreece
    CityAthens
    Period14/09/200918/09/2009

    Keywords

    • Cognitive radio
    • Frequency synthesizer
    • Low power
    • Spectrum sensing
    • Wide-band

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