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Changing temperature during transient due to an event in Spectre

Hello Sailor

I wish to change the temperature of a transient simulation when a certain condition occurs e.g when "calibration" goes high (it's a digital signal) I want to change the tempertature.

Thanks

Philip

  • Andrew Beckett

    Hi Philip,

    You can't do this currently. You can change the temperature at different times (using the dynamic parameter capability on the transient analysis), but not based on events. If you have models that support self-heating, then the device temperature can change as a result of that, but that's probably not what you want.

    The closest would be to use the save* options to regularly save the circuit state, and then have a verilogA model which finishes the simulation when the event occurs. You can use the $finish_current_analysis task, such as this:

    analog

       @(cross(V(a)-0.9)) $finish_current_analysis;

    endmodule

    Then you could use the recover option to restart from that and change the temperature. But that would be rather clunky...
    You could also probably use SpectreMDL to do something similar (using auto-stop).

    So please contact customer support and an enhancement request can be filed.

    Thanks,

    Andrew.

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