'nmos4' is an undefined primitive device

Hi Andy,

nmos4 is a symbol instance in analogLib, but it needs to be mapped to one of the valid device types in spectre.  In the case above it looks like you would be setting the model name to nmosajm when you instantiate the device in the schematic.  That's fine, you just need to make sure the definition of that model is correct.   You should decide which model you want to use and then use that in your model statement rather than nmos4.  Some typical choices for fictional processes like this are bsim3v3 or bsim4, but there are dozens of other choices as well.  You can get a list of the available model types by entering "spectre -h" and looking for the list in the section that starts with "Available components".  You can then get additional information about the model parameters by entering "spectre -h <component type>", for example, "spectre -h bsim3v3".  In your case, the model definition might look like:

model nmosajm bsim3v3 type=n tnom=27 tox=4.1e-9 xj-1e-7

TOM

Thanks Tom, the simulation ran without error after adding a period before "model":  

 .model nmosajm bsim3v3 type=n  tnom=27 tox=4.19n 

 Is that proper syntax when using Spectre?

Best

Andy 

If the model is in a file with a ".scs" suffix, then it should be in spectre syntax. If it has any other suffix, it's assumed to be in SPICE syntax. Spectre syntax doesn't have the leading dot, whereas SPICE does.

You can explicitly set the language by adding:

simulator lang=spectre

or:

simulator lang=spice

directives to change language mode. Anything after the directive in the same file will use the last language directive.

Regards,

Andrew.