Varactor Capacitance

Discussion in 'Homework Help' started by demartinoj, Jan 25, 2009.

  1. demartinoj

    Thread Starter Member

    Jan 25, 2009
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    0
    I have been reviewing my old text books on semi conductor circuit approximations to refresh my memory. I have run in to a problem at the end of a chapter that I can not figure out.

    If I have a 100 microHenry inductor in parallel with a varcator, what range of capicitance does the varactor need to have to tune the am radio band 535 to 1605 kHz?
    Should I use the resonant frequency formula and solve for C at 535 and 1605kHz?

    Any help is appreciated.
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    Yes, the variactor is treated as a variable capacitor, no more. The specs on the diode define whether it will achieve the needed capacitance.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,649
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