Enrico Rubiola


About the Presenter

Enrico Rubiola is a full professor with the Université de Franche Comté and a researcher with the CNRS FEMTO-ST Institute, Besancon, France, a member of the Observatory of Besancon, and an associated researcher at INRiM, the Italian institute of primary metrology in Torino.   In 2012, Enrico founded the Oscillator IMP project, a platform for the measurement of short-term frequency stability and AM/PM noise.  In 2013, he founded the European Frequency and Time Seminar (http://efts.eu), a no-profit crash course in Time and Frequency, and he has been chairing and running it since.

Enrico's primary interests are high-purity oscillators, AM and PM noise, noise in digital systems, time and frequency metrology, frequency synthesis, Allan variances, microwave photonics, precision electronics and instrumentation.  He is worldwide known for his innovative instruments for AM/PM noise measurement with ultimate sensitivity, –210 dBc/Hz and below, for the theory of the ``Leeson effect,'' for the theory of modern frequency counters (,   ), for dedicated signal-processing methods, and for hacking oscillators from the phase noise plots.  In 2018, Enrico received the IEEE W. G. Cady Award “for groundbreaking contributions” in the field.

A wealth of free articles, slideshows, and lectures are available on the Enrico's home page http://rubiola.org.

About the Presentation

"Almost All About Phase Noise"

Many scientific and technological applications rely on precise timing, with main focus on system consistency rather than on absolute time accuracy vs UTC.  In this class of problems, phase noise, short-term frequency stability and jitter are therefore appropriate to describe time fluctuations from low RF to optics.  This tutorial is an introduction to phase noise and frequency stability.  We cover the following topics:
  • What is phase noise and amplitude noise. Definitions and principles.  Phase noise spectrum, Allan variance and other types of variance.  Jitter
  • The origin of phase noise in electronic devices. Shot, thermal, additive, parametric, time-like noise and phase-like noise
  • Phase noise mechanisms in oscillators, aka the Leeson effect
  • Phase noise in analog and digital systems. Frequency synthesis, mixing, quantization noise, aliasing, etc.
  • Useful measurement methods
  • The architecture of analog and digital instruments
  • Common pathologies and pitfalls
  • Examples from laboratory practice

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