Low-Phase-Noise Gigahertz Voltage-Controlled Oscillators in CMOS

  • Jan Craninckx
  • Michiel Steyaert

Abstract

A design strategy for the realization of low-phase-noise VCOs is presented. The possible realizations of integrated inductors are discussed, with emphasis on bondwire inductors. A general formula for the phase noise in LC-tuned oscillators is derived, based on the concepts of effective resistance and capacitance. A trade-off between noise and power is possible with the newly developed enhanced LC-tanks. An oscillator based on these principles was implemented in a 0.7-μm CMOS technology. Measured phase noise is-85 dBc/Hz at 10 kHz from the 1.8-GHz carrier.

Keywords

Phase Noise Series Resistance Noise Source Active Inductor Parasitic Resistance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • Jan Craninckx
    • 1
  • Michiel Steyaert
    • 1
  1. 1.K. U.LeuvenESAT-MICASHeverleeBelgium

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