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Optimization and Montecarlo simulations

Luigi G

Hello,

is there a simple way in ADE-XL to run global optimization on each single run of a Montecarlo simulation?

Best regards,

Luigi

Parents

  • Hi Luigi,

    No. I'm not sure what the use of that would be because you'd then have a different optimal solution for each monte carlo simulation. There is the Improve Yield run mode which has the goal of giving you a design point that maximises the yield (this works by performing iterations of sizing and monte carlo), but that's not quite what you're asking - it's the closest there is though.

    Andrew. 

  • in reply to Andrew Beckett

    Hi Andrew,

    thanks a lot for your quick feedback.

    The purpose of the simulation is to simulate a matrix of blocks (1 block = 1 Montecarlo run), and for each block determine the value of a DAC code (a "trimming DAC" is included in each block) which minimize the voltage dispersion of a given node of the block.

    I think I should consider Ocean-XL for this.

    Thanks again,

    Luigi

Reply
  • in reply to Andrew Beckett

    Hi Andrew,

    thanks a lot for your quick feedback.

    The purpose of the simulation is to simulate a matrix of blocks (1 block = 1 Montecarlo run), and for each block determine the value of a DAC code (a "trimming DAC" is included in each block) which minimize the voltage dispersion of a given node of the block.

    I think I should consider Ocean-XL for this.

    Thanks again,

    Luigi

Children
  • in reply to Luigi G

    Hi Luigi,

    The way this is often done is to use a "pre-run script" which allows you to potentially search (e.g. using a successive approximation approach in the pre-run script) to set the trim bits. Then the final analysis is done with the corrected code so you're seeing the remaining variation after calibration.

    I know we do have a workshop for using pre-run scripts with ADE XL which shows this, but at the very least there's this one: Techniques for Simulating Calibrated Circuits with Virtuoso ADE Assembler. It's focused on the newer Assembler tool, but even if you don't have access to that yet, you can still see the bit which talks about pre-run and calcVal-based approaches. Or contact customer support and we can get the pre-run workshop to you for ADE XL.

    Regards,

    Andrew.

  • in reply to Andrew Beckett

    Hi Andrew,

    thanks a lot for your suggestion. I'll take a look at the pre-run scripts and how they work.

    Best regards,

    Luigi

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