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Corner and varible sweep simulation in spectre

lahsivece

Hi ,

I am trying to do a multivariable sweep and corner simulation in spectre . 

In ocean , it is easy , I can do following 

b0_list = list(0.0 1.2)
b1_list = list(0.0 1.2)
b2_list = list(0.0 1.2)

corners='("ss" "ff" "tt" "snfp" "fnsp")

foreach(corner corners

modelFile(list("<path_to_model_library>/model.lib.scs" sprintf(nil "%s" corner)))
foreach(x b2_list
 desVar("b2" x)
 foreach(y b1_list
 desVar("b1" y)
 foreach(z b0_list
 desVar("b0" z)
  resultsDir(sprintf(nil "<path_to_result_directory>/spectre/schematic/corner=%sb5=%gb4=%gb3=%gb2=%gb1=%gb0=%g",corner,b5_z,b4_y,b3_x,x,y,z))
 run()
 )
 )
 )
)


How can I modify above to use it  for spectre simulations from command line ?

Due to some logistical issues , I can have access to either one  MMSIM (for spectre) or IC514( for ocean) for simulation .

Please advise. 

Thanks 

Parents

  • Vishal,

    Unfortunately you can't sweep model sections in spectre, but you can do something like this:

    // example using nested sweeps

    include "models.scs" section=nn

    parameters b2=0.0 b1=0.0 b0=0.0

    // silly circuit just to do something
    M1 (d g 0 0) nch w=1u l=0.5u
    vd (d 0) vsource type=dc dc=b1
    vg (g 0) vsource type=sine freq=1M ampl=b2

    sweepb2_1 sweep param=b2 values=[0.0 1.2] {
      sweepb1_1 sweep param=b1 values=[0.0 1.2] {
        sweepb0_1 sweep param=b0 values=[0.0 1.2] {
        tran_1 tran stop=1u
        }
      }
    }

    alt1 altergroup {
        include "models.scs" section=ff
    }

    sweepb2_2 sweep param=b2 values=[0.0 1.2] {
      sweepb1_2 sweep param=b1 values=[0.0 1.2] {
        sweepb0_2 sweep param=b0 values=[0.0 1.2] {
        tran_2 tran stop=1u
        }
      }
    }

    alt2 altergroup {
        include "models.scs" section=ss
    }

    sweepb2_3 sweep param=b2 values=[0.0 1.2] {
      sweepb1_3 sweep param=b1 values=[0.0 1.2] {
        sweepb0_3 sweep param=b0 values=[0.0 1.2] {
        tran_3 tran stop=1u
        }
      }
    }

    Regards,

    Andrew.

Reply

  • Vishal,

    Unfortunately you can't sweep model sections in spectre, but you can do something like this:

    // example using nested sweeps

    include "models.scs" section=nn

    parameters b2=0.0 b1=0.0 b0=0.0

    // silly circuit just to do something
    M1 (d g 0 0) nch w=1u l=0.5u
    vd (d 0) vsource type=dc dc=b1
    vg (g 0) vsource type=sine freq=1M ampl=b2

    sweepb2_1 sweep param=b2 values=[0.0 1.2] {
      sweepb1_1 sweep param=b1 values=[0.0 1.2] {
        sweepb0_1 sweep param=b0 values=[0.0 1.2] {
        tran_1 tran stop=1u
        }
      }
    }

    alt1 altergroup {
        include "models.scs" section=ff
    }

    sweepb2_2 sweep param=b2 values=[0.0 1.2] {
      sweepb1_2 sweep param=b1 values=[0.0 1.2] {
        sweepb0_2 sweep param=b0 values=[0.0 1.2] {
        tran_2 tran stop=1u
        }
      }
    }

    alt2 altergroup {
        include "models.scs" section=ss
    }

    sweepb2_3 sweep param=b2 values=[0.0 1.2] {
      sweepb1_3 sweep param=b1 values=[0.0 1.2] {
        sweepb0_3 sweep param=b0 values=[0.0 1.2] {
        tran_3 tran stop=1u
        }
      }
    }

    Regards,

    Andrew.

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