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How to correlate two parameters in an optimization run?

LuisGutierrez

Hi all,

I need to optimize the size of a clamping diode. I can edit its area and perimeter. These two parameters are of course correlated. One option to run the optimization is to create a variable X and introduce expressions for area and perimeter as follows:

Area: X^2; Perimeter: 4*X

Then give a range for X and let the optimizer do its work. However, I wonder if it is possible to correlate the parameters of the instance without creating a variable, which allows me to optimize without having to edit the schematic. If let's say, I give a range for the perimeter, is it possible to define the area as (perimeter/4)^2 and run the optimization? What would be the syntax to use?

Thanks in advance.

Lucho

version: Virtuoso IC6.1.6-64b.500.11.EHF2051.

  • You don't need to edit the schematic, but you will need a variable still. You need to use the variables and parameters assistant in ADE XL and select the instance on the schematic, and then add parameters for the area and perimeter (on the parameters tab, over the area parameter, do Right Mouse->Add parameter, and then the same for perimeter). Then in the bottom half of the assistant, set the values for area and parameter to be the expressions of X (or whatever).

    For simple cases where you need things to be matched or ratio-matched, this can be done without a variable - but in more complex cases you'd have to introduce a variable. However, the benefit of doing it via the variables and parameters assistant is that you don't need to edit the schematic.

    Regards,

    Andrew.

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