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problem using design variable in calculator

robert 21

Hello, i am trying to build Id/W vs gm_id expression ,the design variables are shown bellow.

When i pressed the VAR button and the schematics pops up,i press the NMOS,and no list of L,W pops up,it stays empty as shown bellow.
Where did i go wrong?

Thanks.



  • The VAR button in the calculator has a slightly unusual use model. It asks you to click on an instance, but the instance you click on has to be one that is using that variable. So if you click on V0 or V1, you'll be able to select those variables (Vds and Vgs respectively).

    Or if you use the expression builder in the ADE Explorer/Assembler output pane (so if you have an output expression, clicking on the little icon at the right end of the "Details" field for that output expression pops up the expression builder) - you can type VAR, and then it will prompt you with available variables to pick from.

    Andrew

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