[cadence newbie] plotting model parameter

keith1200rs said:

Vth (or more correctly vth0) does not vary when you sweep the input voltage, so it is not s logical thing to want to plot. In general model parameters are fixed, at least for each individual run of a simulation. You could make vth0 value dependant on a parameter and then plot a circuit characteristic relative to that parameter.

Maybe if you explain what you are trying to do it might help.

Keith.

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jimito13 said:

Hi aindejeje,

1.Create a file (with any text editor) with .scs extension (for example sigtype.scs) and
in this file write the following :

save * sigtype=all

2.Include the above file you just created to your model files from the ADE L environment.

3.Run the simulation with your custom swept parameter and via the menu Tools-->Results Browser of ADE L you will be able to plot any available parameter versus your swept variable.

Hope this is what you were asking for.

Regards,
Jimito13

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keith1200rs said:

That should be easy enough provided you set up your circuit correctly. If you define vth as the gate source voltage at a (small) Idd then you create a circuit with a transistor and a fixed current source at that Idd. Then sweep the bulk voltage and plot the gate-source voltage.

Keith

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