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Multiple variable MonteCarlo simulation in OCEAN

Alex Vasjanov

Hello,

 I've been wondering, is there any way of doing multiple variable Monte Carlo simulations using OCEAN programming language? Monte Carlo simulations from ADE provide only a singe parameter to be swept, but what about several? Is that even possible?

 

My guess is that it might be impossible due to the specifics of the algorithm that is implemented, but I might be mistaking.

 

 Regards,

Aleksandr

 

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  • Andrew Beckett

     Alexsandr,

    Unfortunately you didn't mention which version you're using, but my guess from how you have phrased your question that it's IC5141?

    There's no reason in spectre why you can't sweep any number of variables outside of the monte carlo analysis - but ADE (and OCEAN) limit what is directly supported. That said, there is nothing to prevent you doing:

    foreach(temp list(-40 27 80)
      foreach(vdd list(1.6 1.8 2.0)
        desVar("temp" temp)
        desVar("vdd" vdd)
        monteRun(...)
        ... process monte carlo results ...
      )
    )

    That will work fine. Given that the monte carlo run itself would normally dominate, the cost of the overhead running several separate simulations for sweeping the other variables is low.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

     Alexsandr,

    Unfortunately you didn't mention which version you're using, but my guess from how you have phrased your question that it's IC5141?

    There's no reason in spectre why you can't sweep any number of variables outside of the monte carlo analysis - but ADE (and OCEAN) limit what is directly supported. That said, there is nothing to prevent you doing:

    foreach(temp list(-40 27 80)
      foreach(vdd list(1.6 1.8 2.0)
        desVar("temp" temp)
        desVar("vdd" vdd)
        monteRun(...)
        ... process monte carlo results ...
      )
    )

    That will work fine. Given that the monte carlo run itself would normally dominate, the cost of the overhead running several separate simulations for sweeping the other variables is low.

    Regards,

    Andrew.

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