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Making a mathematical expression between two parameters in ADE GXL output setup window

NorNand

Hello,

I am running the Circuit optimization from ADE GXL, I am practising simple two-stage operational amplifier as it has shown below, 

I want to include a formula in my output setup the M6 drain current is near or equal to M7 drain current. This condition for the optimizer will assure that my circuit will have a very small offset voltage.

It is very basic to bring both currents to the output setup but I don't know how to make this expression formula between them,

Thank you

  • NorNand

    Hi,

    I made indirect solution by taking abs(IM6-IM7) then I push this to ADE and select minimize to zero as a design target specification

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