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Syntax for device check violation file assert statement

highspeedio

Hello,

I would like to ask how to write device check violation files (for example devcheck.scs) I can include in my model files and use to check for violations.

I believe the correct syntax for example for a vgs voltage check would be:

nmos_name assert mod=nmos_model_name expr="v(g)-v(s)" max =[max_voltage] duration=[duration of violation]

Let's say I want to modify the above assert statement so it checks only when another condition is true: I want to check vgs voltage only when vgd>0 for example

or when ids >0.  How would I write that?

Thank you!

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  • Frank Wiedmann

    You can use the ternary operator (https://en.wikipedia.org/wiki/%3F:) in the expression. The documentation for the device checks is in chapter 12 of the Spectre Circuit Simulator and Accelerated Parallel Simulator User Guide (https://support.cadence.com/apex/techpubDocViewerPage?path=spectreuser/spectreuser16.1/chap12.html).

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  • Frank Wiedmann

    You can use the ternary operator (https://en.wikipedia.org/wiki/%3F:) in the expression. The documentation for the device checks is in chapter 12 of the Spectre Circuit Simulator and Accelerated Parallel Simulator User Guide (https://support.cadence.com/apex/techpubDocViewerPage?path=spectreuser/spectreuser16.1/chap12.html).

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