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Howto include a text-file (eg. S-parameters or LRCG file) in a library and track its location automatically for netlisting ?

Herge

I am currently developping symbols for use in EMC simulations. For example models of cables and bulk-current injection coils.

The cables are unshielded twisted pairs described by frequency-dependent RLCG parameters in a text file.

For the BCI coils, I need to use a 1-port described by S-parameters. See attachment for snapshot of the schematic of the coil model.

I  want to release those cells as symbols and schematics in a library. However the mtline or the nport component require the absolute path of the file to be specified. I would like to store the text files inside the directory structure of the library, and make sure that whenever the library is moved as a whole the netlisting will still be such that the correct files are loaded by nport or mtline.

I would like to minimize the customisation effort and if possible not do custom netlisting. I was wondering if I could use a custom AEL function to automatically fill in the library path in the CDF field when netlisting ? 

Parents
  • Hey Andrew,

    Here's a possible tweak to the code to allow for the continued use of the file path for things like parametrized file path overrides of the lib/cell/view code. The 'file' simInfo Spectre variable needs to be in the 'otherParameters' field for it to show up in instance properties:

    --snip--

    sparamFile=nlGetParamStringValue(inst "file")
    if( !sparamFile && ddId then
    nlPrintString(netlister " file=\"")
    nlPrintString(netlister ddId~>readPath)
    nlPrintString(netlister "\"")
    else
    nlPrintString(netlister " file=")
    nlPrintString(netlister sparamFile)
    )

    --end-snip--

    Andrew.
Reply
  • Hey Andrew,

    Here's a possible tweak to the code to allow for the continued use of the file path for things like parametrized file path overrides of the lib/cell/view code. The 'file' simInfo Spectre variable needs to be in the 'otherParameters' field for it to show up in instance properties:

    --snip--

    sparamFile=nlGetParamStringValue(inst "file")
    if( !sparamFile && ddId then
    nlPrintString(netlister " file=\"")
    nlPrintString(netlister ddId~>readPath)
    nlPrintString(netlister "\"")
    else
    nlPrintString(netlister " file=")
    nlPrintString(netlister sparamFile)
    )

    --end-snip--

    Andrew.
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