AM to PM noise conversion in a cross-coupled quadrature harmonic oscillator

We derive the dynamic equations governing the cross‐coupled quadrature oscillator, perturbed by noise, leading to an expression for the close‐in phase noise. The theory shows that a nonlinear coupling transconductance results in AM‐PM noise conversion close to the carrier, which increases with the c...

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Bibliographic Details
Published in:	International journal of RF and microwave computer-aided engineering Vol. 16; no. 1; pp. 34 - 41
Main Authors:	Djurhuus, Torsten, Krozer, Viktor, Vidkjær, Jens, Johansen, Tom K.
Format:	Journal Article
Language:	English
Published:	Hoboken Wiley Subscription Services, Inc., A Wiley Company 01-01-2006
Subjects:	AM-to-PM noise conversion LC oscillators nonlinear circuit analysis phase noise quadrature oscillator
Online Access:	Get full text
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Summary:	We derive the dynamic equations governing the cross‐coupled quadrature oscillator, perturbed by noise, leading to an expression for the close‐in phase noise. The theory shows that a nonlinear coupling transconductance results in AM‐PM noise conversion close to the carrier, which increases with the coupling strength. A simple linear time‐domain model is employed to illustrate the results. © 2005 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2006.
Bibliography:	istex:40C96EE780027BFBB4DF08708D34FDDF5E243F5D ArticleID:MMCE20129 ark:/67375/WNG-5DX70WR4-B
ISSN:	1096-4290 1099-047X
DOI:	10.1002/mmce.20129