optimizeRun() tutorial?

 What version of IC software are you using?  IC5141? IC614?

You may want to take a look at Cadence Online Solution (This one just happens to be for IC5141)

 http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11118188

It shows how you can use an OCEAN script to run an Optimization Analysis inside of a parametric analysis.  It may not be exactly what you are looking for, but be close enough to give you an idea of what you can do.

 You also may want to take a look at the examples in the software hierarchy at:

<cds>/tools/dfII/samples/artist/OCEAN/optimization

 best regards,

 Tawna Wilsey

Thanks!  That's pretty much whan I was looking for.

 Ok... so that tutorial works in 5.1, but in 6.1.3, it breaks and gives me the error listed above"

 *Error* eval: undefined function - ocniOptPerformances

 Was that functionality removed in Cadence 6.1x?

How do I do optimizations in 6.1.x with ocean? 

Hi Mark,

Optimization is entirely different in IC6.1.x. (Which is why I didn't "go there" in my last response...)  :-)

The good news is Optimization is much better in IC6.1.x!

I recommend taking a look at the following document (Virtuoso Migration Guide)

http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=pubs;q=/cicMigGuide/cicMigGuide6.1.4/5251to61.html

You will want to read Chapter 2 on Circuit Optimization in the Virtuoso GXL User Guide before you even think about OCEAN.

 http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=pubs;q=/adeGXL/adeGXL6.1.4/adeGXLOptimize.html

Once you're comfortable with that.....For OCEAN, you'll want to check out OCEAN commands in XL mode

http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=pubs;q=/oceanref/oceanref6.1.4/chap15.html

If you have not yet taken the IC6.1.X training classes through Cadence Educational Services, I recommend looking into them.

best regards,

Tawna

Hi Tawna,

 Do you know of any example ocnxl scripts?

I'm trying to slog my way through Chapter 2', but I don't use ADE (switched to ocean/skill early on).  I'd found the ocean XL documentation, but it is just a listing of commands without any full example script.

Update:  

I found this example script embedded in a pdf of a power point presentation...Posting it here to keep track of it.

ocnSetXLMode()
ocnxlTargetCellView( "ADC_YieldOptim" "adc_sample_hold" "adexl" )

ocnxlBeginTest("ADC_YieldOptim:Test_Sims")
    simulator( 'spectre )
    design( "ADC_YieldOptim" "Test_Sims" "config")
    modelFile( '("$AMS/models/gpdk090/MonteCarlo/gpdk090_mc.scs" "TT"))
    analysis('ac ?start "100k" ?stop "1M" ?dec "20" ) ;; Some options not shown
    desVar( "ampl" 200m )
    desVar( "clk_freq" 125M)
    temp( 27 )
    ocnxlOutputExpr( "bandwidth((VF(\"/out\") / VF(\"/in\")) 3 \"low\")" ?name “bw")
ocnxlEndTest()

ocnxlBeginTest("ADC_YieldOptim:Test_CMRR")
    simulator( 'spectre )
    design( "ADC_YieldOptim" "Test_CMRR" "config")
    modelFile( '("$AMS/models/gpdk090/MonteCarlo/gpdk090_mc.scs" "TT"))
    analysis('ac ?start "1M" ?stop "10G" ) ;; Some options not shown
    desVar("ACmag" 1)
    temp( 27 )
    ocnxlOutputSignal(“/out” ?plot t)
    ocnxlOutputExpr( "ymin(dB20(VF(\"/out\")))" ?name "CMRR")
ocnxlEndTest()

ocnxlPutGreaterthanSpec( "ADC_YieldOptim:Test_Sims:1" “bw(3dB)" "110k")
ocnxlPutLessthanSpec( "ADC_YieldOptim:Test_CMRR:1" "CMRR" "-100" ?weight "1")
ocnxlSweepParam("ADC_YieldOptim/adc_sample_hold/schematic/NM4/fw" "1u:0.5u:30u")
ocnxlSweepParam("ADC_YieldOptim/adc_sample_hold/schematic/NM4/l" "280n:10n:2u")
ocnxlCorner( "C0" '(
("variable" "temperature" "-50")
("model" "$AMS/models/gpdk090/MonteCarlo/gpdk090_mc.scs" ?section "\"MC\"") ))
ocnxlCorner( "C1“ '(
("variable" "vdd" “3.5")
("model" "$AMS/models/gpdk090/MonteCarlo/gpdk090_mc.scs" ?enabled nil ?section "\"FS\"") ) )
ocnxlDisableTest("ADC_YieldOptim:Test_Sims")
ocnxlDisableSweepVar("ampl")
ocnxlLocalOptimizationOptions( ?effort "fine" ?meetAllGoals "1" ?timeLimit "" ?numPoints "" )
ocnxlRun( ?mode ‘localOptimization ?nominalCornerEnabled t ?allCornersEnabled t ?allSweepsEnabled t)
ocnxlOutputSummary(?exprSummary t ?specSummary t ?detailed t ?wave t)
ocnxlEndXLMode()

Mark

Hi Mark,

Tawna asked me to jump in here for a moment, as I do a lot of work with the ADE XL and GXL (optimization, etc.) technology .  In IC 6.1, optimization falls under ADE GXL.  The engines have been significantly enhanced and offer several powerful algorithms.  The optimizer works from an ADE XL test setup and supports multiple testbenches, specifications and corners.  It can optimize a large number of design parameters over a wide variety of measurements.  Hence, the OceanXL script you found.  It sets up the tests, corners, measurements, specs and variables and then runs local optimization.

 I would say your best bet for learning this technology would be to start off using it from the GUI, saving the resulting setup to an OceanXL script and working from there.  There are several new videos in the Video Library at http://support.cadence.com which show you how to set up and run simulations, specifications, sweeps and parameterization in ADE XL.  After that, optimization is essentially just a matter of setting the Run Mode to Local or Global Optimization and hitting the run button.

Stacy

 Thanks for the info.

With the previous script I was able to figure out enough stuff that I was able to get it to stop complaining about errors and start complaining about licence tokens.  Turns out that we don't have the GXL option and this was all just a fun exercise.

 Thanks for all the help anyway,

Mark

Hi Stacy,

I am new to IC 6, and I am trying to do what I used to do quite easily in IC 5. I am trying to do a curve fitting of a filter response to an ideal response. This used to be a typical example and was done simply with the optimizer in IC 5. I looked at "Circuit Optimization" chapter in the ADE GXL manual and it doesn't discuss "curve fitting". The specification target has always to be a numeric value. Can you please direct me to a tutorial or something that explains how to do this?

 Thanks

Hi,

 In my experience, curve-fitting for optimization is most easily done simply by taking the difference of 2 waveforms, applying the abs() function to get the absolute value, measuring the maximum value (ymax) of the result and then create a goal for that number to be less than some small value (or to be minimized).  E.g. ymax(abs(sig1-sig2)) 

There is also a function called "compare" in the calculator which allows you to specify an absolute and/or relative tolerance for comparing 2 waveforms and returns a waveform with zero value in the domain where the tolerances are met.  You can read about it in the "Calculator Functions" section of the Virtuoso Visualization and Analysis (ViVA) Tool User Guide.

 I hope this is useful.

Regards,
Stacy