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Question of Monte Carlo simulation of Virtuoso 6.1.5

bhl3302

Hi All, I am trying to use monte carlo simulation for a bandgap voltage reference. When I followed the procedure in this forrum and other tutorial, and click "run" for "monte carlo sampling", it looks like nothing was executed. I post my setup and hope anybody can advise about it.

1. I have a cellview named "monte_carlo". In ADE L, the simulation output is "\net55" and it runs well over temperature -50C to 125C (DC simulation in sweeping the temperature). I selected and set "tt" to allmodels.scs, and select "design.scs". After running sussceesully, I saved this state as "temp".

2. I open ADE XL->"create new view"->"open in 'new window'"

3. Create test and load the state "temp".

Now the setup looks like this [Since I cannot insert an imagine from my computer here, I created a same thread in another place. The setup file picture is shown in http://www.edaboard.com/thread281229.html#post1203445. Please kindly go to this post to see the picture, sorry for the inconvenience]

 

When I click "run", it never showed any progress. For example, I set number of points to 100, then it always show 0/100. 

 

1.Could anybody advise how can I make simulation run? My target is to achieve some statistic distribution of output reference voltage.

2.Do I need to load more scs file here? like process.scs?

 

Thank you very much! 

Parents

  • Hi Andrew, actuallay singe run is also not working, not just monte carlo.I am trying to get host ID now. At the mean time,I used "ADE XL help" to find this information

    -------

    Virtuoso Analog Design Environment XL Known Problems and Solutions

     

    CCR 674267: Running a parameter sweep with Monte Carlo is not supported

    Description: If any global variable or parameter is being swept, users cannot run Monte Carlo analysis. The variable/parameter has to be disabled.

    Solution: Use the Corners UI to setup the conditions under which the results of Monte Carlo need to be evaluated. 

    -----------

    1. Do you think this is the root cause of my issue? Since I want to sweep temperature and run monte carlo to see the variation of output voltage? 

    2. If that is the case, could you advise how I can make corner UI run this test?

    Thank you very much！ 

Reply

  • Hi Andrew, actuallay singe run is also not working, not just monte carlo.I am trying to get host ID now. At the mean time,I used "ADE XL help" to find this information

    -------

    Virtuoso Analog Design Environment XL Known Problems and Solutions

     

    CCR 674267: Running a parameter sweep with Monte Carlo is not supported

    Description: If any global variable or parameter is being swept, users cannot run Monte Carlo analysis. The variable/parameter has to be disabled.

    Solution: Use the Corners UI to setup the conditions under which the results of Monte Carlo need to be evaluated. 

    -----------

    1. Do you think this is the root cause of my issue? Since I want to sweep temperature and run monte carlo to see the variation of output voltage? 

    2. If that is the case, could you advise how I can make corner UI run this test?

    Thank you very much！ 

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