Error SFE-23 (undefined model or subcircuit modp and modn) and Error (SFE-874)

Hi Dominik,

Oh dear - you really do appear to be trying random things which will stand no chance of working. 

Often design kits will set up the model path automatically to ensure the models are defined - if they don't, there's presumably some documentation with the design kit to tell you where the model files are. These are the transistor models (subckts, model statements) that need to be included so that Spectre knows the meaning of the primitive devices (modp and modn in your case). These are probably defined somewhere in a file with a ".scs" suffix (although it is possible that they're defined in SPICE syntax so they could be described differently). Without knowing what technology or design kit you're using, I doubt anyone could guess what the file is likely to be called (unless they happen to recognise the "modn" and "modp" model names).

Including the cds.lib makes no sense; that's the definition of Virtuoso libraries (containing symbols, schematics, CDF, layouts and so on) for the Virtuoso tools to use. Virtuoso must be seeing that otherwise you couldn't draw your schematics. It's certainly not a spectre model file, hence the syntax errors.

Including the input.scs similarly makes no sense - all the model libraries form does is specify a bunch of files to include in the input.scs that it is generating, so putting a reference to itself makes no sense (hence the error about it being recursive).

Regards,

Andrew.

Hi Dominik,

Oh dear - you really do appear to be trying random things which will stand no chance of working. 

Often design kits will set up the model path automatically to ensure the models are defined - if they don't, there's presumably some documentation with the design kit to tell you where the model files are. These are the transistor models (subckts, model statements) that need to be included so that Spectre knows the meaning of the primitive devices (modp and modn in your case). These are probably defined somewhere in a file with a ".scs" suffix (although it is possible that they're defined in SPICE syntax so they could be described differently). Without knowing what technology or design kit you're using, I doubt anyone could guess what the file is likely to be called (unless they happen to recognise the "modn" and "modp" model names).

Including the cds.lib makes no sense; that's the definition of Virtuoso libraries (containing symbols, schematics, CDF, layouts and so on) for the Virtuoso tools to use. Virtuoso must be seeing that otherwise you couldn't draw your schematics. It's certainly not a spectre model file, hence the syntax errors.

Including the input.scs similarly makes no sense - all the model libraries form does is specify a bunch of files to include in the input.scs that it is generating, so putting a reference to itself makes no sense (hence the error about it being recursive).

Regards,

Andrew.