Phase Noise, Signal Power and Current Consumption in CMOS Colpitts Oscillators

  • Qiuting Huang


For local oscillators in radio frequency applications, oscillation amplitude (LO power), phase noise and current (power) consumption are the three most important design parameters. Analytical expressions will be presented for CMOS Colpitts oscillators to link phase noise to signal power. The relationships between phase noise, signal power and current consumption will be discussed and compared with Leeson’s observations.


Duty Cycle Phase Noise Oscillation Amplitude Bias Current Noise Spectral Density 
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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • Qiuting Huang
    • 1
  1. 1.ETHSwiss Federal Institute of TechnologyZurichSwitzerland

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