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Phase noise characterization of subharmonic injection locked oscillators

Published: 01 July 2011 Publication History

Abstract

In this work we present a detailed study of the phase noise of subharmonic injection locked oscillators (s-ILOs). A new simple and efficient model has been presented for accurately predicting the phase noise of a microwave s-ILO. The validity of the analytical technique is verified with measurement results obtained from a 5-GHz fully differential Colpitts-based s-ILO. The results showed that a phase noise improvement of 12 dB at 1 kHz offset frequency compared to the free-running case can be achieved, whereas the power consumption is 21 mW. Copyright © 2010 John Wiley & Sons, Ltd.
(When sinusoidal noise is added both to the oscillator and the injection signal, the instantaneous phase of the oscillator and the synchronizing signal will be θ + δθ and ψinj + δψinj, respectively. Neglecting the phase perturbation introduced during the harmonic generation process, we can derive the phase relationship between the oscillator and the injection source.)
  1. Phase noise characterization of subharmonic injection locked oscillators

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    Published In

    cover image International Journal of Circuit Theory and Applications
    International Journal of Circuit Theory and Applications  Volume 39, Issue 7
    July 2011
    101 pages
    ISSN:0098-9886
    EISSN:1097-007X
    Issue’s Table of Contents

    Publisher

    John Wiley and Sons Ltd.

    United Kingdom

    Publication History

    Published: 01 July 2011

    Author Tags

    1. injection-locked oscillator
    2. oscillator
    3. phase noise

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