Simulating a varactor in spectre

Discussion in 'Cadence' started by Maz, Feb 18, 2006.

  1. Maz

    Maz Guest

    Hi, I am trying to simulate a basic varactor in spectre. I am doing a
    transient analysis on a varactor, however, I am only seeing a linear
    voltage, rather than the charging characteristics that one would see
    for a regular capacitor.

    Does anyone know how to plot the control voltage vs the capacitance of
    a varactor using spectre.

    Thanks.
     
    Maz, Feb 18, 2006
    #1
  2. Maz

    Andrew Beckett Guest

    Well, without having some knowledge of how the varactor is implemented, it's
    hard to answer this.

    I would imagine that you could integrate the current through the capacitor, and
    divide by the voltage across it - and then plot that against the control
    voltage? (Plot both the first calculation, and the control voltage, and then
    change the X axis to be the control voltage).

    Regards,

    Andrew.
     
    Andrew Beckett, Feb 21, 2006
    #2
  3. Maz

    Erik Wanta Guest

    Erik Wanta, Feb 25, 2006
    #3
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