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Changing the FET model parameters dynamically during Transient Simulation

Quantum7

For example, I have some .scs file which has the following some generic model:

section typ
parameters
...
+ mainfet_rdsw = 5000
...
endsection typ

Now in the above model, lets say at some point of time during transient simulation I want to change that mainfet_rdsw to 7000, how can I do this?

I know I can list parameters to be changed in a file and use it as paramset=pset in "additional options" and I can change things like L,W or component values during transient, however; what I am trying to do is a little bit different thing and I wanted to know what should I do in that case?

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  • Andrew Beckett

    This is a very odd thing to do (even if you wanted to change all of them) because of course you can't really change the model parameters during real life (unless maybe you are trying to emulate aging effects, in which case there's RelXpert for doing that).

    Anyway, the simple answer is that you can't do this (without some work on the model files). The only way I can think of would be to duplicate the model in the model file (or in an additional model file) with a different name and have that model parameter in the differently named  controlled by a different global parameter. Then you have the one instance you wish to change use the modified copy of the model, and you can then dynamically alter the new global parameter without affecting any other instance.

    Regards,

    Andrew.

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  • Andrew Beckett

    This is a very odd thing to do (even if you wanted to change all of them) because of course you can't really change the model parameters during real life (unless maybe you are trying to emulate aging effects, in which case there's RelXpert for doing that).

    Anyway, the simple answer is that you can't do this (without some work on the model files). The only way I can think of would be to duplicate the model in the model file (or in an additional model file) with a different name and have that model parameter in the differently named  controlled by a different global parameter. Then you have the one instance you wish to change use the modified copy of the model, and you can then dynamically alter the new global parameter without affecting any other instance.

    Regards,

    Andrew.

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