Published March 2, 2023 | Version 2023-02-10
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The Enrico's Chart for Phase Noise and Two-Sample Variances

  • 1. CNRS FEMTO-ST Institute, and INRiM


  • 1. CNRS FEMTO-ST Institute, OSU-THETA


A two-page reference card which collects formula, sketches and relevant concepts about phase noise, frequency stability, Allan variance and similar variances.  If you use phase noise and Allan variance often, a laminated front/back copy may be a staple on your desk.

© Enrico Rubiola, Creative Common 4.0 license CC-BY-NC-ND.  Redistribution: please use the link, it always resolves to the latest version of the document.

Manufacturers of equipment broadly related to the measurement of time and frequency are encouraged to distribute the Chart for free with their products, alone or with the Companion article.

Enrico Rubiola and Francois Vernotte, "The Companion of Enrico’s Chart for Phase Noise and Two-Sample Variances," IEEE Trans. Microwave Theory Techniques, early access, February 22, 2023.  DOI: 10.1109/TMTT.2023.3238267, open access under CC-BY-NC-ND 4.0 license.




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Oscillator IMP – Plateforme de Mesure de l'Instabilité des Oscillateurs ANR-11-EQPX-0033
Agence Nationale de la Recherche