Hi All, I'm a graduate student and I'm new to virtuoso. I would like to simulate the variation of the threshold voltage of a transistor (I'm not interested in evaluating circuit's robustness to parameters variation and a Monte Carlo analysis can't be the solution to my problem). I tried to sweep the parameter in the model provided by the foundry, but it consists of a subckt with a nested model. Something like this: simulator lang=spectre subckt pmos (d g s b) parameters ... .... m1 d g s b pmosmod ... .... model pmosmod bsim4 type=p ... .... vth0 = ... Launching the simulation, I get the following error: ERROR (SFE-1997): "input.scs" 26: dc: parameter `mod': Invalid model name `pmosmod' was given as value of parameter `mod'. Can I specify (I don't know how) that I want to sweep the parameter of that model, even if none of the istances placed in the schematics recall it directly? Thanks, Corrado
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