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DC op point from an S-parameter Analysis

Curtisma

Is there a way to get the DC solution by running an sparameter analysis alone?  I am using APS for this simulation.  Running a DC operating point along with the sparameter simulation makes it take longer and the spar sim calculates its own operating point to measure the sparameters so it would be great if I could use it's operating point rather than simulating it twice.

-Curtis

  • Andrew Beckett

    Hi Curtis,

    You could just set prevoppoint=yes on the sp analysis. However, if you have the dc first, then it shouldn't need to re-create the operating point anyway - it says (in my case):

        Operating points will not be recomputed: the circuit and conditions were not changed since previous analysis.

    If you set prevoppoint=yes on the sp analysis, it doesn't given this message.

    I did wonder about just running sp alone and then just adding an info analysis to save the operating point data, but this doesn't appear to work - I think you have to run an explicit dc analysis to be able to save the operating point to disk for annotation purposes.

    Regards,

    Andrew.

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