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sweeping transistor number of fingers in a simulation

Hi,
I need to compare transistors from different foundries and I'd like to do that by running several DC simulations where I sweep the number of fingers (keeping the other parameters fixed).
Ideally I'd like to do something like here below

but this does not work, it does not throw any error , but the results are wrong.
Any suggestion on how to do that ?

thanks
Tommaso

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Volker T 7 days ago

Hi,

presumably, you only need to use a valid number in your "Width All Fingers" field (usually, this should be computed automatically anyways from "Width" and "Number of Fingers").

Anyways, your "Width All Fingers" results in a device width of "2 meters times num_f", which is a value the simulator will limit to maximum device width allowed by your PDK for the respective device, which is why you don't see the expected effect.

Try (2.0u * num_f) instead.
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TommasoF 6 days ago in reply to Volker T

right, that's a good point. that worked, thanks!
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TommasoF 6 days ago in reply to Volker T

right, that's a good point. that worked, thanks!
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