Nonlinear analysis of a cross-coupled quadrature harmonic oscillator

Publication: Research - peer-reviewJournal article – Annual report year: 2005

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The dynamic equations governing the cross-coupled quadrature harmonic oscillator are derived assuming quasi-sinusoidal operation. This allows for an investigation of the previously reported tradeoff between close-to-carrier phase noise and quadrature precision. The results explain how nonlinearity in the coupling transconductances, in conjunction with a finite amplitude relaxation time and de-tuning of the individual oscillators, cause close-to-carrier AM-to-PM noise conversion. A discussion is presented of how the theoretic results translate into design rules for quadrature oscillator ICs. SPECTRE RF simulations verify the developed theory.
Original languageEnglish
JournalIEEE Transactions on Circuits And Systems Part I: Regular Papers
Publication date2005
Volume52
Issue11
Pages2276-2285
ISSN1057-7122
DOIs
StatePublished

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Copyright: 2005 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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