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  3. Plot transient OP vs. Time

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Plot transient OP vs. Time

HoWei
HoWei over 7 years ago

Hi,

I want to plot the transient operating point of a device versus time (e.g device Msrowin, operating point for ids).

One way to achieve this is to create a file "tran_op.scs" and include it with the model files. The file content will be:

             save Mswroin:ids

In the output definitions I would add:  getData("Mswroin:ids" ?result 'tran), then I can plot the "ids" versus time.

Questions:

1) How should the file syntax look like, when the device is in a subcircuit (e.g "/DUT/Mswroin" does not work) ?

2) Is there another (easier) way to evaluate the transient operating point vs. time ?

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  • Andrew Beckett
    Andrew Beckett over 7 years ago
    1. save DUT.Mswroin:ids    (you need to use spectre's hierarchy separator, and use the names that appear in the netlist)
    2. In ADE (for some time now), use Outputs->To be saved->Select OP Parameters and then you can click on the device(s) in the schematic and say which parameters you wish to save, and whether you want them auto-plotted or not. This adds a new tab in the ADE outputs. The calculator also adds OPT (for transient) and OS (for DC sweep) buttons to allow you to retrieve the results back into the calculator.

    Regards,

    Andrew.

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  • Andrew Beckett
    Andrew Beckett over 7 years ago
    1. save DUT.Mswroin:ids    (you need to use spectre's hierarchy separator, and use the names that appear in the netlist)
    2. In ADE (for some time now), use Outputs->To be saved->Select OP Parameters and then you can click on the device(s) in the schematic and say which parameters you wish to save, and whether you want them auto-plotted or not. This adds a new tab in the ADE outputs. The calculator also adds OPT (for transient) and OS (for DC sweep) buttons to allow you to retrieve the results back into the calculator.

    Regards,

    Andrew.

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  • HoWei
    HoWei over 7 years ago in reply to Andrew Beckett

    The output equation OT("/DUT/Mswroin" "vsat_marg") does evaluate the transient operating point versus time. No need for model file inclusion any more.

    Thanks, your answer pointed me into the right direction !

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