• DocumentCode
    1211984
  • Title

    Varactor characteristics, oscillator tuning curves, and AM-FM conversion

  • Author

    Hegazi, Emad ; Abidi, Asad A.

  • Author_Institution
    Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
  • Volume
    38
  • Issue
    6
  • fYear
    2003
  • fDate
    6/1/2003 12:00:00 AM
  • Firstpage
    1033
  • Lastpage
    1039
  • Abstract
    A simple analysis relates the small-signal specification of a varactor´s capacitance to an oscillator´s tuning curve. The notion of an effective capacitance across the amplitude of oscillation is introduced. The analysis also explains how the varactor converts AM noise on the oscillation into FM, which is phase noise. The analysis is experimentally validated.
  • Keywords
    circuit tuning; phase noise; radiofrequency integrated circuits; radiofrequency oscillators; varactors; voltage-controlled oscillators; AM noise; AM-FM conversion; FM noise; amplitude of oscillation; differential LC oscillator; oscillator tuning curves; phase noise; small-signal specification; tuning curve; varactor characteristics; voltage-controlled oscillator; Capacitance; Circuits; Frequency; Phase noise; Steady-state; Tail; Tuning; Varactors; Voltage control; Voltage-controlled oscillators;
  • fLanguage
    English
  • Journal_Title
    Solid-State Circuits, IEEE Journal of
  • Publisher
    ieee
  • ISSN
    0018-9200
  • Type

    jour

  • DOI
    10.1109/JSSC.2003.811968
  • Filename
    1202006