Stats

  • Locked Locked
  • Replies 15
  • Subscribers 147
  • Views 18459
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Question regarding running parametric simulations using Ocean

gurusub

 Hi all,

I have a set of design variables in my schematic. I would like to input multiple data vectors to my schematic and save the output data in Ocean

For example, If P is a set of parameters P={p1,p2,p3,p4} (p1-p4 are the design variables in the schematic). I would create a matrix of data values with different instances of P ie my data matrix would look like 

Q=[-------P1---------

     --------P2---------

    ---------P3--------]

and so on where each Pi contain (p1i, p2i,p3i,p4i). (In other words I want to use the analogus of paramset command in Spectre for ocean). I would like to simulate my circuit for these values in Q and make some measurements using Calculator function and finally store the output data in the text file. Can somebody please go through the steps in accomplishing the same?

 

Thanks,

 

Guru

 

Parents

  • Hi Guru,

    You can do this with OCEAN quite easily, as the paramAnalysis function supports paramset:

    paramAnalysis("CAP" ?values '(6e-13 8e-13 1.2e-12 1.5e-12 ) ?sweepType 'paramset
      paramAnalysis("temp" ?values '(20 40 60 80 ) ?sweepType 'paramset
    ))
    paramRun()

    You need to define a set of nested paramAnalysis calls, with a list of values, with sweepType set to 'paramset as shown. The list has to be the same length for each paramAnalysis, but then it will do (in the above case) 4 runs.

    Then when you access the results after the simulation, you will get waveforms which are a 4-member family - you can then do your calculations as normal in the calculator, and anything that you calculate which would result in a scalar for a single run, will end up as points versus the swept variables. For example, if I do ocnPrint(ymax(v("/out" ?result 'tran))) you get this:


    # Set No. 1

    (CAP = 600f)
    temp              ymax((v "/out" ?resultsDir "/users/ME/simulation/ampTest/spectre/schematic" ?result "tran"))
    20                  149.795m       

    # Set No. 2
    (CAP = 800f)
    temp              ymax((v "/out" ?resultsDir "/users/ME/simulation/ampTest/spectre/schematic" ?result "tran"))
    40                  146.225m       

    # Set No. 3
    (CAP = 1.2p)
    temp              ymax((v "/out" ?resultsDir "/users/ME/simulation/ampTest/spectre/schematic" ?result "tran"))
    60                  140.35m        

    # Set No. 4
    (CAP = 1.5p)
    temp              ymax((v "/out" ?resultsDir "/users/ME/simulation/ampTest/spectre/schematic" ?result "tran"))
    80                  133.77m        

    Regards,

    Andrew.

     

     

Reply

  • Hi Guru,

    You can do this with OCEAN quite easily, as the paramAnalysis function supports paramset:

    paramAnalysis("CAP" ?values '(6e-13 8e-13 1.2e-12 1.5e-12 ) ?sweepType 'paramset
      paramAnalysis("temp" ?values '(20 40 60 80 ) ?sweepType 'paramset
    ))
    paramRun()

    You need to define a set of nested paramAnalysis calls, with a list of values, with sweepType set to 'paramset as shown. The list has to be the same length for each paramAnalysis, but then it will do (in the above case) 4 runs.

    Then when you access the results after the simulation, you will get waveforms which are a 4-member family - you can then do your calculations as normal in the calculator, and anything that you calculate which would result in a scalar for a single run, will end up as points versus the swept variables. For example, if I do ocnPrint(ymax(v("/out" ?result 'tran))) you get this:


    # Set No. 1

    (CAP = 600f)
    temp              ymax((v "/out" ?resultsDir "/users/ME/simulation/ampTest/spectre/schematic" ?result "tran"))
    20                  149.795m       

    # Set No. 2
    (CAP = 800f)
    temp              ymax((v "/out" ?resultsDir "/users/ME/simulation/ampTest/spectre/schematic" ?result "tran"))
    40                  146.225m       

    # Set No. 3
    (CAP = 1.2p)
    temp              ymax((v "/out" ?resultsDir "/users/ME/simulation/ampTest/spectre/schematic" ?result "tran"))
    60                  140.35m        

    # Set No. 4
    (CAP = 1.5p)
    temp              ymax((v "/out" ?resultsDir "/users/ME/simulation/ampTest/spectre/schematic" ?result "tran"))
    80                  133.77m        

    Regards,

    Andrew.

     

     

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.