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Annotate symbol with design variables

ritterp

Hello,

I would like to add a label (by means of ILLabel guess) to the symbol whose value depends on global design variables. Let's imagine we had a symbol for a transmissionline segment consisting of a cap with value Par("C") and an inductor with value pPar("L"). When instantiating the cell we would set C=DESIGNVARIABLE_C and L=DESIGNVARIABLE_L. In the label I would like to see the result of ZW=sqrt(L/C), but values of the design variables (DESIGNVARIABLE_C and DESIGNVARIABLE_L) should be taken into accout. Is there any easy way to evaluate the expression sqrt(l/C) in SKILL? I have had a look at ael* functions to interpret expressions, but the parser seems to be unable to find out design variable values. I am using IC 5.1.41 with analog design environment for the global variables.

Thank you so much for your help,

 
Phil 

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  • Andrew Beckett

    Phil,

    Create another CDF parameter called, say, "myparam", with parseAsCEL set to yes, and parseAsNumber set to yes, and set the value in the CDF to:

    sqrt(iPar("L")/iPar("C"))

    You could set editable to nil, and even display to nil if you want (so it doesn't show up on the edit properties form). You can then use the Edit Component Display to show this additional calculated parameter in the way I described previously,or add "myparam" into the paramLabelSet.

    Regards,

    Andrew.

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  • Andrew Beckett

    Phil,

    Create another CDF parameter called, say, "myparam", with parseAsCEL set to yes, and parseAsNumber set to yes, and set the value in the CDF to:

    sqrt(iPar("L")/iPar("C"))

    You could set editable to nil, and even display to nil if you want (so it doesn't show up on the edit properties form). You can then use the Edit Component Display to show this additional calculated parameter in the way I described previously,or add "myparam" into the paramLabelSet.

    Regards,

    Andrew.

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