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How to sweep two parameter in ADE Assembler?

SimbaG

Hi all,

I am running monte carlo simulation with parameter sweeping.

What I need is sweeping a triangle region, which is 0<x<5k, 0<y<x.

I tried, set X and Y as design variables and write the following:

X:  {From/To} Linear:0:500:5K{From/To}

Y:  {From/To} LinearStepCount:0:11:VAR("X"){From/To}

But seems like this is not working, and VAR("X") is always the starting of the X, in this case, the VAR("X") is always 0.

Thank you for your help.

Best Regards,

Simba

My software version:

virtuoso -W

sub-version  IC23.1-64b.43

spectre -V
@(#)$CDS: spectre version 21.1.0 64bit (mmsimcm36c-4)

Parents

  • You cannot have use VAR() in the start, count, stop or other fields of a sweep. However, since the number of sweeps you are trying to perform is consistent, you can achieve this by doing:

    Ysweep: {From/To} LinearStepCount:0:11:1{From/To}

    Y: VAR("Ysweep")*VAR("X")

    Andrew

Reply

  • You cannot have use VAR() in the start, count, stop or other fields of a sweep. However, since the number of sweeps you are trying to perform is consistent, you can achieve this by doing:

    Ysweep: {From/To} LinearStepCount:0:11:1{From/To}

    Y: VAR("Ysweep")*VAR("X")

    Andrew

Children
  • in reply to Andrew Beckett

    Thank you very much Andrew. This works.

    I have one more question.

    What if we want Y has a constant step instead of constant number of sweeps?

    E.g. 

    X:  {From/To} Linear:0:500:5K{From/To}

    Y:  {From/To} Linear:0:500:VAR("X"){From/To}

    Have a nice weekend.

  • in reply to SimbaG
    SimbaG said:

    What if we want Y has a constant step instead of constant number of sweeps?

    No, you can't do that - it would require an irregular sweep where the number of sweep points were not the same for the inner sweep, and that's not possible.

    Potentially you could just set Y to 0:500:5K and then use the Run Preview to disable the combinations you don't want, but this would be rather manual... 

    Andrew

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