How to find lamda and r0 of nfet

Discussion in 'Cadence' started by Kuan Zhou, Apr 8, 2005.

  1. Kuan Zhou

    Kuan Zhou Guest

    Hi,

    I am designing a Miller op-amp. I ran the DC analysis for my design.
    Then I got a bunch of model parameters using Results - > Print ->
    DC Operating Points. But I cannot find the value of lamda (short
    channel effect) and r0 of the nfet. From the textbook, r0=1/(lamda*I).

    Because the gain of transistors is often expressed with the
    multiplication of the transconductance and r0. It's better to know how r0
    is changed with different W/L ratios.

    Can anybody give me some suggestions?

    Kuan
     
    Kuan Zhou, Apr 8, 2005
    #1
  2. Kuan Zhou

    Svenn Are Bjerkem Guest

    Some transistor models like bsim3 does not operate directly with lambda.
     
    Svenn Are Bjerkem, Apr 8, 2005
    #2
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