Thermodynamical Phase Noise in Oscillators Based on L-C Resonators (Foundations)

Izpura Torres, José Ignacio and Malo Gomez, Javier (2012). Thermodynamical Phase Noise in Oscillators Based on L-C Resonators (Foundations). "Circuits and Systems", v. 3 (n. 1); pp. 48-60. ISSN 2153-1285. https://doi.org/10.4236/cs.2012.31008.

Description

Title: Thermodynamical Phase Noise in Oscillators Based on L-C Resonators (Foundations)
Author/s:
  • Izpura Torres, José Ignacio
  • Malo Gomez, Javier
Item Type: Article
Título de Revista/Publicación: Circuits and Systems
Date: January 2012
ISSN: 2153-1285
Volume: 3
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Ingeniería Electrónica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Using a new Admittance-based model for electrical noise able to handle Fluctuations and Dissipations of electrical energy, we explain the phase noise of oscillators that use feedback around L-C resonators. We show that Fluctuations produce the Line Broadening of their output spectrum around its mean frequency f0 and that the Pedestal of phase noise far from f0 comes from Dissipations modified by the feedback electronics. The charge noise power 4FkT/R C2/s that disturbs the otherwise periodic fluctuation of charge these oscillators aim to sustain in their L-C-R resonator, is what creates their phase noise proportional to Leeson’s noise figure F and to the charge noise power 4kT/R C2/s of their capacitance C that today’s modelling would consider as the current noise density in A2/Hz of their resistance R. Linked with this (A2/Hz?C2/s) equivalence, R becomes a random series in time of discrete chances to Dissipate energy in Thermal Equilibrium (TE) giving a similar series of discrete Conversions of electrical energy into heat when the resonator is out of TE due to the Signal power it handles. Therefore, phase noise reflects the way oscillators sense thermal exchanges of energy with their environment

More information

Item ID: 10852
DC Identifier: http://oa.upm.es/10852/
OAI Identifier: oai:oa.upm.es:10852
DOI: 10.4236/cs.2012.31008
Official URL: http://www.scirp.org/journal/PaperInformation.aspx?paperID=16624
Deposited by: Memoria Investigacion
Deposited on: 16 May 2012 08:45
Last Modified: 20 Apr 2016 19:03
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