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Phase noise analysis and design of a 3-GHz bipolar differential colpitts VCO

Publiceringsår: 2005
Språk: Engelska
Sidor: 391-394
Publikation/Tidskrift/Serie: Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005.
Dokumenttyp: Konferensbidrag


This paper presents a low-phase-noise differential bipolar Colpitts VCO, implemented in a 0.35/spl mu/m BiCMOS process. A time-variant phase noise analysis yields closed- form symbolic expressions for the dominant noise sources in the 1/f/sup 2/ phase-noise region. Measurements show a phase noise of -123 dBc/Hz at 1MHz offset from a 2.8-3.1 GHz carrier, for a figure-of-merit of 183 dBc/Hz. A very good agreement between the derived theoretical formulas, spectreRF simulations, and measurements is observed.


  • Electrical Engineering, Electronic Engineering, Information Engineering


  • ISBN: 0-7803-9205-1

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