PoleZero VS. AC analysis in Spectre

Discussion in 'Cadence' started by analogIC, Apr 19, 2011.

  1. analogIC

    analogIC Guest

    Hello all,

    I am simulating a complex amplifier architecture, and I am interested
    in monitoring the pole zero locations using PoleZero analysis. I have
    a couple of questions w.r.t. Spectre analysis:

    1. The dominant pole shown by AC, is missing in Pole Zero analysis.
    This is slightly strange because other high frequency poles are
    correctly reported

    2. Is there any improvement in PZ analysis in various Spectre
    versions ? lets say from IC 5.1.41 to IC 6.14/6.15 ?

    Looking forward for good answers.

    CHeers !
     
    analogIC, Apr 19, 2011
    #1
  2. analogIC

    Andrew Beckett Guest

    analogIC wrote, on 04/19/11 14:18:
    I think you posted the same question on the Custom IC forums on the Cadence web
    site - in which case it _might_ be something that has been improved in a later
    MMSIM version (the IC version isn't relevant), but I think you'd be best
    contacting Cadence customer support with an example showing the problem (once
    you've tried the latest MMSIM release; I believe you were using MMSIM61 which is
    rather old - maybe 5 years).

    Regards,

    Andrew
     
    Andrew Beckett, Apr 22, 2011
    #2
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