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Multiple variable MonteCarlo simulation in OCEAN

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

Parents

pranucci over 11 years ago

Andrew,
I'm trying something similar in IC5141. I just want to run monte carlo inside of a paramter sweep. I have the following code:
VIN_List='("5.0")
temp_List='("25" "125")
BG_code_List='("6")
CL_code_List='("0")

number = 0

fprintf(myPort "number,VIN, BG_code, CL_code, temp, VBG, VREF, Voffset, Iout_DC\n")

foreach(VIN VIN_List
            desVar("pvdd" VIN)
foreach(BG_CODE BG_code_List
            desVar(    "BG_code" BG_CODE    )
foreach(CL_CODE CL_code_List
            desVar(    "CL_code" CL_CODE    )
foreach(temp temp_List
                temp(temp)

                monteCarlo( ?numIters "5" ?startIter "1"
                    ?analysisVariation 'mismatch
                    ?sweptParam "None"
                    ?sweptParamVals "27"
                    ?saveData t
                    ?nomRun "yes"
                    ?append nil
                    ?saveProcessParams t
                    )
                monteExpr( "VBG" "VDC(\"/BG_2036\")" )
                monteExpr( "VREF" "VDC(\"/VREFA\")" )
                monteExpr( "Voffset" "(VDC(\"/DRAIN\") - VDC(\"/IREF\"))" )
                monteExpr( "Iout_dc" "IDC(\"/V17/MINUS\")" )
                monteRun()

number=number+1

printf("***** %d *****\n" number)
Right now I am just simply trying to run two different temperatures and the issue is that I WILL get 10 monte carlo runs, however, the mcdata file I get has identical results for the first 5 runs and the second 5 runs which I believe means that the monte carlo sweeps are ignoring my attempt to set the 'temp' variable. I have the same issue trying to set any other variable in the sweep - every monte carlo run appears to be the same regardless of the desVar statement.
Here's the mcdata file for this run:
1.23223 0.405017 0.000328546 0.504977 1.23223 0.405017 0.000328546 0.504977
1.21931 0.401064 0.000453496 0.492068 1.21931 0.401064 0.000453496 0.492068
1.22453 0.402812 -0.000109186 0.523377 1.22453 0.402812 -0.000109186 0.523377
1.22864 0.404161 0.000559947 0.491905 1.22864 0.404161 0.000559947 0.491905
1.2225 0.402226 0.000660994 0.487249 1.2225 0.402226 0.000660994 0.487249
I'm using 4 monteExpressions and the second 4 columns are identical to the first 4.
Any idea what's going on?
Thanks,
Paul
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pranucci over 11 years ago

Andrew,
I'm trying something similar in IC5141. I just want to run monte carlo inside of a paramter sweep. I have the following code:
VIN_List='("5.0")
temp_List='("25" "125")
BG_code_List='("6")
CL_code_List='("0")

number = 0

fprintf(myPort "number,VIN, BG_code, CL_code, temp, VBG, VREF, Voffset, Iout_DC\n")

foreach(VIN VIN_List
            desVar("pvdd" VIN)
foreach(BG_CODE BG_code_List
            desVar(    "BG_code" BG_CODE    )
foreach(CL_CODE CL_code_List
            desVar(    "CL_code" CL_CODE    )
foreach(temp temp_List
                temp(temp)

                monteCarlo( ?numIters "5" ?startIter "1"
                    ?analysisVariation 'mismatch
                    ?sweptParam "None"
                    ?sweptParamVals "27"
                    ?saveData t
                    ?nomRun "yes"
                    ?append nil
                    ?saveProcessParams t
                    )
                monteExpr( "VBG" "VDC(\"/BG_2036\")" )
                monteExpr( "VREF" "VDC(\"/VREFA\")" )
                monteExpr( "Voffset" "(VDC(\"/DRAIN\") - VDC(\"/IREF\"))" )
                monteExpr( "Iout_dc" "IDC(\"/V17/MINUS\")" )
                monteRun()

number=number+1

printf("***** %d *****\n" number)
Right now I am just simply trying to run two different temperatures and the issue is that I WILL get 10 monte carlo runs, however, the mcdata file I get has identical results for the first 5 runs and the second 5 runs which I believe means that the monte carlo sweeps are ignoring my attempt to set the 'temp' variable. I have the same issue trying to set any other variable in the sweep - every monte carlo run appears to be the same regardless of the desVar statement.
Here's the mcdata file for this run:
1.23223 0.405017 0.000328546 0.504977 1.23223 0.405017 0.000328546 0.504977
1.21931 0.401064 0.000453496 0.492068 1.21931 0.401064 0.000453496 0.492068
1.22453 0.402812 -0.000109186 0.523377 1.22453 0.402812 -0.000109186 0.523377
1.22864 0.404161 0.000559947 0.491905 1.22864 0.404161 0.000559947 0.491905
1.2225 0.402226 0.000660994 0.487249 1.2225 0.402226 0.000660994 0.487249
I'm using 4 monteExpressions and the second 4 columns are identical to the first 4.
Any idea what's going on?
Thanks,
Paul
Cancel
Vote Up 0 Vote Down

Cancel

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