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Parameterize model parameter

Hi,

I have a question about the parameterization of transistor model parameters. I have edited the scs file and the CDF from transistor cell, so that the model parameters that I need to tweak appear on properties of the device. I set those parameters to a single value, the simulation works perfectly. However, If I try to parameterize any of the model parameters, the ADE removes them from the netlist.

Does anyone knows what should I do different, so the simulation works?

See below some screenshots that may help understand better the problem.

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Andrew Beckett over 2 years ago

I'm assuming you have these CDF parameters listed in the instParameters section of the Simulation Information tab for Spectre? I can't see any reason why they would be removed from the netlist though.

I also assume you're setting those variables par_agidl etc in the Design Variables in ADE?

Andrew
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fbaumgratz over 2 years ago in reply to Andrew Beckett

Hi,

Yes, I have included the parameters in the instParameters section and included the variables in the ADE. In fact, everything works fine if I set these variables to a single value. The problem only happens when I try to sweep one of them.

Filipe
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fbaumgratz over 2 years ago in reply to Andrew Beckett

Hi,

Yes, I have included the parameters in the instParameters section and included the variables in the ADE. In fact, everything works fine if I set these variables to a single value. The problem only happens when I try to sweep one of them.

Filipe
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Andrew Beckett over 2 years ago in reply to fbaumgratz

Hi Filipe,

I assume you're updating the Base CDF and not the Effective CDF? I'm just thinking that otherwise you may be just changing the CDF in memory - if running a single simulation, it will use the CDF from memory, but if doing a sweep it will netlist in the background and use the CDF from disk (which won't then contain your changes). You need to edit the Base CDF in order to have it updated on disk.

Regards,

Andrew
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fbaumgratz over 2 years ago in reply to Andrew Beckett

Hi Andrew,

Indeed, I was just updating the Effective CDF. I will try to updated the Base CDF.

Thanks!

Filipe
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