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include a model files for nmos and pmos into virtuoso

HI all,

how can I include a model files for nmos and pmos into virtuoso like the one which is attached. I want to use this model file as it has equal threshold voltage for pmos and nmos. It is needed only for simulation results.

Regards

m1_typ.doc

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Andrew Beckett over 12 years ago +1

Put the contents of that document in a file, for example "massobrio.sp" Create a schematic using transistors from analogLib - I used nmos4 and pmos4, but you could use the 3-terminal devices nmos and pmos…
auto dipper over 12 years ago +1

Thanks for the reply. Does the model file name have to be "massobrio.sp" or "massobrio.m" , I mean I had the impression that model files should end with an extension .m? regardss
Andrew Beckett over 12 years ago +1

In the old spectreS and cdsSpice interfaces you needed to have model files (in cdsSpice format) with the ".m" suffix. With spectre, the suffix doesn't matter, except that if the suffix is ".scs" it is…

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auto dipper over 12 years ago

Thanks for the confirmation, I tried to do the way as you suggested and the simulation happened but I got the below Notice in the output log file
Notice from spectre during initial setup

Pmos: Value of ‘kp’ and ‘u0’ are not consistent

Nmos: Value of ‘kp’ and ‘u0’ are not consistent

What is the effect of above on output and how to remove this?

Another issues is that as I observed the number of parameters in any other model file like ami06.m is 94 but the model file I am using for equal threshold voltage (attached) has only 27 parameters. So where will the issues arise in using such model file with less no. of parameters?

regards

m1_typ.doc
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auto dipper over 12 years ago

Thanks for the confirmation, I tried to do the way as you suggested and the simulation happened but I got the below Notice in the output log file
Notice from spectre during initial setup

Pmos: Value of ‘kp’ and ‘u0’ are not consistent

Nmos: Value of ‘kp’ and ‘u0’ are not consistent

What is the effect of above on output and how to remove this?

Another issues is that as I observed the number of parameters in any other model file like ami06.m is 94 but the model file I am using for equal threshold voltage (attached) has only 27 parameters. So where will the issues arise in using such model file with less no. of parameters?

regards

m1_typ.doc
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include a model files for nmos and pmos into virtuoso

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