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virtuoso transient parametric simulation : I functions of V (possibly with no ocean) [spectre]

samung

Hello,

using Cadence Virtuoso IC6.1.5 and spectre MMSIM10_11 as simulator, I would like to do the following simulation on a basic circuit  a resistor :

transient simulation,  with a Vpulse generator in parallel (one pulse with Vlow=-vdd and Vhigh=+vdd), so it means transient parametric simulation with vdd being the parameter.

As far as now, I can easily get : I functions of t for vdd sweep and V functions of t for vdd sweep

I would like to get straight (it means with no .csv export and Office excel treament), I functions of V

What is the Calculator command ?

Then I would like to work straight in the cadence netlist (input.scs/input.ckt), it means with no ocean.

Thanks a lot for your help !!

P.

  • Your question is pretty unclear, but I think you're asking how to plot one signal versus another. You can do this in the ViVA graph (by plotting both signals, and then doing right mouse click over the x-axis, or using the Y vs Y icon in the results browser, but if you want to do it in the calculator, you can use the SKILL code mentioned in this post: http://community.cadence.com/cadence_technology_forums/f/38/p/20764/1305136#1305136

    You need to load the code, and then call the function mentioned in the comments at the top; in the Calculator you can then pick "User Defined SKILL Functions" in the categories of functions, and you'll see abChangeXAxis in the list of functions.

    Note that I don't think you can directly do this in the spectre netlist - but of course you can run spectre from the command line and then use the calculator afterwards to do this plot.

    However, I may have misunderstood your intentions?

    Regards,

    Andrew.

  • thanks, Y vs Y seems to be what I was looking for.

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