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Transient simulation extract specific voltage/time data

Franktgg

Hi,

Is it possible to set a range of voltage in transient simulation, so the simulator can dump those data only without getting the whole period of transient simulation result?

The reason I want to do that is because I only want to get the zero crossing voltage timing information, which needs to be high precision.

But setting the high precision in transient would get many useless time point at other voltage. As the simulating time increase, the data would be very large.

Thanks,

  • You can't limit the output to only specific voltage ranges, but rather than tightening the precision to accurate resolve the threshold crossing, a better solution would be to create a Verilog-A model which forces a timepoint close the the threshold crossing. It would be quite simple - something like:

    `include "disciplines.vams"
    module threshCrossing(p,n);
    electrical p,n;
    input p,n;

    analog begin
      @(cross(V(p,n)));
    end

    endmodule

    Note the code above is just typed in from memory - you could limit the cross to only look for crossings in a particular direction. Normally the @(cross... would have some action after it, but that's not needed here.

    Regards,

    Andrew.

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