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Pass touchstone file path as string parameter to n2port instance

MarkyMark

Hi,

I'm looking for a solution to vary the sparameter files used for my n2port instance in Cadence simulation. Ideally, I can sweep over multiple files like any other parameter.

I would like to define a basic filename, e.g. file = "/projectxyz/file", then have a number identifier index 1,2,3,... and terminate the string with ".s2p". This I can do with strcat it seems. However, when I pass any string as a variable (global or design makes no difference) to the S-parameter data file field of the n2port instance from analogLib, I always obtain a simulation error. I have also tried strcat within the field and different ways of putting th string there, however only the fully explicit typed string without "" directly defined in the instance seems yo cause no error. 

Is there a way to do a simple sweep here defined by global or design variable?

Regards

  • Andrew Beckett

    The best solution would be to use analogLib/nport instead of n2port. For some time now this has had the ability to specify that the file name is a design variable:

    You can specify any number of ports (e.g. 2) and the symbol will adjust accordingly.

    It's doable with n2port, but you'd need to copy the component and edit the CDF and mess with netlist procedures and so on - I did have an article on doing this but it's been retired since the flexible nport component supports this without needing customisation.

    Andrew

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