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Using Montecarlo simulation for finding Rise and fall tile of a SETTLING waveform

RFQuery

 Dear All,

I want to do MONTE_CARLO simulation for my circuit for finding rise time and fall time.

The output is settling after 800u s.

I have to do some pre-processing before finding the last expression. The expressions I used as below.

But it did NOT work.

Can anybody tell how to find risetime and falltime of the waveform using MONTE-Carlo simulation if one needs some house-keeping processing of the waveform.

 .......

analysis('dc ?saveOppoint t  )
analysis('tran ?stop "1u"  ?errpreset "moderate"  ?maxstep "5p" 
        ?method "euler"  ?strobeperiod "5p"  )
desVar(      "frf" 6G    )
desVar(      "prf" -20    )
desVar(      "frf2" 6.1G    )
desVar(      "w" 20u    )
desVar(   "sigma" 3)
option(    'temp  "27.0"
    'iabstol  "1e-14"
    'vabstol  "1e-4"
)
saveOption( 'currents "selected" )
saveOption( 'save "all" )
temp( 27.0 )
monteCarlo( ?numIters "1" ?startIter "1"
    ?analysisVariation 'processAndMismatch ?sweptParam "None"
    ?sweptParamVals "27" ?saveData nil
    ?nomRun "yes" ?append nil
    ?saveProcessParams t
)
CLOCK_DUTY_PERIOD=2.5e-10
CLIP_START=0.8u
CLIP_END=0.9u

clip_I_P=clip( v("/MIXER_I_P" ?result 'tran) CLIP_START CLIP_END)
plot(clip_I_P)
MIN_VALUE=ymin(clip_I_P) + 0.02
MAX_VALUE=ymax(clip_I_P)- 0.03
UPPER_THRESOLD=MIN_VALUE + ( (MAX_VALUE-MIN_VALUE)*0.9 )
LOWER_THRESHOLD=MIN_VALUE + ( (MAX_VALUE-MIN_VALUE)*0.1 )
RISE_UPPER= cross( clip_I_P UPPER_THRESOLD 2 'rising )
RISE_LOWER= cross( clip_I_P LOWER_THRESHOLD 2 'rising )

monteExpr("RISE_TIME" "abs(RISE_UPPER-RISE_LOWER)")

monteRun()
Parents

  • Sorry, the spectre.out doesn't show the error.

    Here I have pasted the CDS.log ( at the end) output.

    It says  "RISE_TIME" does not evaluate properly.

    Kind regards,

     

     

     

     

     

     Warning from spectre in `rnhr1000_mml130e', during circuit read-in.
    \o
    \o     WARNING (SFE-31):
    \o         "/home/manas/work_cad/UMC130FDKMFC_B08_PB/Models/Spectre/./MML130E_RES_V152.mdl.scs"
    \o
    \o         51: `rnhr1000_mml130e': Parameter `w' redefines parameter of same name
    \o         defined at higher level.
    \o
    \o Warning from spectre during hierarchy flattening.
    \o
    \o     WARNING (SFE-30): "input.scs" 57: C12: `mis_flag' is not a valid parameter
    \o         for an instance of `momcaps_asy_mm'.  Ignored.
    \o
    \o     WARNING (SFE-30): "input.scs" 59: C11: `mis_flag' is not a valid parameter
    \o         for an instance of `momcaps_asy_mm'.  Ignored.
    \o
    \o     WARNING (SFE-30): "input.scs" 61: C10: `mis_flag' is not a valid parameter
    \o         for an instance of `momcaps_asy_mm'.  Ignored.
    \o
    \o     WARNING (SFE-30): "input.scs" 63: C13: `mis_flag' is not a valid parameter
    \o         for an instance of `momcaps_asy_mm'.  Ignored.
    \o
    \o     WARNING (SFE-30): "input.scs" 65: R19: `mis_flag' is not a valid parameter
    \o         for an instance of `rnhr1000_mml130e'.  Ignored.
    \o
    \o         Further occurrences of this warning will be suppressed.
    \o
    \o
    \o
    \o
    \o Time for Elaboration: CPU = 52.992 ms, elapsed = 53.4849 ms.
    \o
    \o Time accumulated: CPU = 177.972 ms, elapsed = 396.798 ms.
    \o
    \o Peak resident memory used = 39.3 Mbytes.
    \o
    \o
    \o
    \o
    \o Time for EDB Visiting: CPU = 2.999 ms, elapsed = 2.42996 ms.
    \o
    \o Time accumulated: CPU = 180.971 ms, elapsed = 399.44 ms.
    \o
    \o Peak resident memory used = 39.7 Mbytes.
    \o
    \o
    \o
    \o
    \o
    \o Warning from spectre during initial setup.
    \o
    \o     WARNING (CMI-2424): NM3: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM4: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM2: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM0: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM5: `Acde' = 300e-03 is unusually small.
    \o
    \o         Further occurrences of this warning will be suppressed.
    \o
    \o
    \o
    \o
    \o Circuit inventory:
    \o               nodes 22
    \o
    \o             bsim3v3 8     
    \o
    \o           capacitor 32    
    \o
    \o                port 4     
    \o
    \o            quantity 9     
    \o
    \o              res_va 12    
    \o
    \o            resistor 4     
    \o
    \o                vcvs 4     
    \o
    \o             vsource 2     
    \o
    \o
    \o
    \o
    \o
    \o Notice from spectre.
    \o
    \o     22 warnings suppressed.
    \o
    \o
    \o
    \o
    \o
    \o Time for parsing: CPU = 1.35279 s, elapsed = 1.43158 s.
    \o
    \o Time accumulated: CPU = 1.53376 s, elapsed = 1.83122 s.
    \o
    \o Peak resident memory used = 52.8 Mbytes.
    \o
    \o
    \o
    \o
    \o ************************************************
    \o
    \o Monte Carlo Analysis `mc1': iteration = (1 -> 1)
    \o ************************************************
    \o
    \o awaiting artil process initialization ....
    \o
    \o Important parameter values:
    \o
    \o     seed = 1
    \o
    \o     numbins = 1
    \o
    \o     sampling = standard
    \o
    \o     variations = all
    \o
    \o     firstrun = 1
    \o     numruns = 1
    \o
    \o     donominal = yes
    \o
    \o
    \o
    \o Notice from spectre during Monte Carlo analysis `mc1'.
    \o
    \o     Out of 4 defined mismatch parameters, 2 is not referenced. There are 16
    \o         mismatch instances.
    \o
    \o
    \o
    \o
    \o **** Performing nominal run for `mc1'
    \o
    \o
    \o ***********************************************
    \o
    \o Transient Analysis `tran': time = (0 s -> 1 us)
    \o ***********************************************
    \o
    \o Important parameter values:
    \o
    \o     start = 0 s
    \o
    \o     outputstart = 0 s
    \o
    \o     stop = 1 us
    \o
    \o     step = 1 ns
    \o
    \o     maxstep = 5 ps
    \o
    \o     ic = all
    \o
    \o     useprevic = no
    \o
    \o     skipdc = no
    \o
    \o     reltol = 1e-03
    \o
    \o     abstol(V) = 100 uV
    \o
    \o     abstol(I) = 10 fA
    \o
    \o     temp = 27 C
    \o
    \o     tnom = 27 C
    \o
    \o     tempeffects = all
    \o
    \o     errpreset = moderate
    \o
    \o     method = euler
    \o
    \o     lteratio = 3.5
    \o
    \o     relref = sigglobal
    \o
    \o     cmin = 0 F
    \o
    \o     gmin = 1 pS
    \o
    \o
    \o
    \o     tran: time = 25 ns        (2.5 %), step = 684.6 fs    (68.5 u%)
    \o
    \o     tran: time = 75 ns        (7.5 %), step = 2.319 ps     (232 u%)
    \o
    \o     tran: time = 125 ns      (12.5 %), step = 2.342 ps     (234 u%)
    \o
    \o     tran: time = 175 ns      (17.5 %), step = 973.7 fs    (97.4 u%)
    \o
    \o     tran: time = 225 ns      (22.5 %), step = 1.496 ps     (150 u%)
    \o
    \o     tran: time = 275 ns      (27.5 %), step = 1.442 ps     (144 u%)
    \o
    \o     tran: time = 325 ns      (32.5 %), step = 549.8 fs      (55 u%)
    \o
    \o     tran: time = 375 ns      (37.5 %), step = 549.2 fs    (54.9 u%)
    \o
    \o     tran: time = 425 ns      (42.5 %), step = 548.8 fs    (54.9 u%)
    \o
    \o     tran: time = 475 ns      (47.5 %), step = 548.4 fs    (54.8 u%)
    \o
    \o     tran: time = 525 ns      (52.5 %), step = 548.2 fs    (54.8 u%)
    \o
    \o     tran: time = 575 ns      (57.5 %), step = 548 fs      (54.8 u%)
    \o
    \o     tran: time = 625 ns      (62.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 675 ns      (67.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 725 ns      (72.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 775 ns      (77.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 825 ns      (82.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 875 ns      (87.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 925 ns      (92.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 975 ns      (97.5 %), step = 625 fs      (62.5 u%)
    \o
    \o Number of accepted tran steps =             419032
    \o
    \o Initial condition solution time: CPU = 0 s, elapsed = 846.148 us.
    \o
    \o Intrinsic tran analysis time:    CPU = 63.4044 s, elapsed = 63.5877 s.
    \o
    \o Total time required for tran analysis `tran': CPU = 63.4074 s (1m  3.4s),
    \o         elapsed = 63.59 s (1m  3.6s).
    \o
    \o Time accumulated: CPU = 64.9421 s (1m  4.9s), elapsed = 66.4327 s (1m  6.4s).
    \o
    \o Peak resident memory used = 53.9 Mbytes.
    \o
    \o
    \o
    \o finalTimeOP: writing operating point information to rawfile.
    \o
    \o
    \o ******************
    \o DC Analysis `dcOp'
    \o ******************
    \o
    \o Important parameter values:
    \o
    \o     reltol = 1e-03
    \o
    \o     abstol(V) = 100 uV
    \o
    \o     abstol(I) = 10 fA
    \o
    \o     temp = 27 C
    \o
    \o     tnom = 27 C
    \o
    \o     tempeffects = all
    \o
    \o     gmindc = 1 pS
    \o
    \o Convergence achieved in 3 iterations.
    \o
    \o Total time required for dc analysis `dcOp': CPU = 2.999 ms, elapsed = 3.30305
    \o         ms.
    \o
    \o Time accumulated: CPU = 64.9541 s (1m  5.0s), elapsed = 66.7037 s (1m  6.7s).
    \o
    \o Peak resident memory used = 54.1 Mbytes.
    \o
    \o
    \o
    \o dcOpInfo: writing operating point information to rawfile.
    \o
    \o modelParameter: writing model parameter values to rawfile.
    \o
    \o element: writing instance parameter values to rawfile.
    \o
    \o outputParameter: writing output parameter values to rawfile.
    \o
    \o designParamVals: writing netlist parameters to rawfile.
    \o
    \o primitives: writing primitives to rawfile.
    \o
    \o subckts: writing subcircuits to rawfile.
    \o
    \o Export:
    \o
    \o     RISE_TIME = 4.65336e-10
    \o Successfully evaluated export statements (based on return code).
    \o
    \o
    \o **** Performing monte carlo loop for `mc1'
    \o
    \o
    \o
    \o
    \o Warning from spectre during Monte Carlo analysis `mc1'.
    \o
    \o     WARNING (CMI-2424): NM3: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM4: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM2: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM0: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM5: `Acde' = 300e-03 is unusually small.
    \o
    \o         Further occurrences of this warning will be suppressed.
    \o
    \o
    \o
    \o
    \o ***************************************************
    \o Transient Analysis `mc1_tran': time = (0 s -> 1 us)
    \o ***************************************************
    \o
    \o Important parameter values:
    \o
    \o     start = 0 s
    \o
    \o     outputstart = 0 s
    \o
    \o     stop = 1 us
    \o
    \o     step = 1 ns
    \o
    \o     maxstep = 5 ps
    \o
    \o     ic = all
    \o
    \o     useprevic = no
    \o
    \o     skipdc = no
    \o
    \o     reltol = 1e-03
    \o
    \o     abstol(V) = 100 uV
    \o
    \o     abstol(I) = 10 fA
    \o
    \o     temp = 27 C
    \o
    \o     tnom = 27 C
    \o
    \o     tempeffects = all
    \o
    \o     errpreset = moderate
    \o
    \o     method = euler
    \o
    \o     lteratio = 3.5
    \o     relref = sigglobal
    \o
    \o     cmin = 0 F
    \o
    \o     gmin = 1 pS
    \o
    \o
    \o
    \o     mc1_tran: time = 25 ns        (2.5 %), step = 2.869 ps     (287 u%)
    \o
    \o     mc1_tran: time = 75 ns        (7.5 %), step = 2.704 ps     (270 u%)
    \o
    \o     mc1_tran: time = 125 ns      (12.5 %), step = 674 fs      (67.4 u%)
    \o
    \o     mc1_tran: time = 175 ns      (17.5 %), step = 815.3 fs    (81.5 u%)
    \o
    \o     mc1_tran: time = 225 ns      (22.5 %), step = 690.5 fs    (69.1 u%)
    \o
    \o     mc1_tran: time = 275 ns      (27.5 %), step = 1.167 ps     (117 u%)
    \o
    \o     mc1_tran: time = 325 ns      (32.5 %), step = 1.091 ps     (109 u%)
    \o
    \o     mc1_tran: time = 375 ns      (37.5 %), step = 1.036 ps     (104 u%)
    \o
    \o     mc1_tran: time = 425 ns      (42.5 %), step = 1.002 ps     (100 u%)
    \o
    \o     mc1_tran: time = 475 ns      (47.5 %), step = 942.9 fs    (94.3 u%)
    \o
    \o     mc1_tran: time = 525 ns      (52.5 %), step = 768.3 fs    (76.8 u%)
    \o
    \o     mc1_tran: time = 575 ns      (57.5 %), step = 715.1 fs    (71.5 u%)
    \o
    \o     mc1_tran: time = 625 ns      (62.5 %), step = 682.1 fs    (68.2 u%)
    \o
    \o     mc1_tran: time = 675 ns      (67.5 %), step = 661.4 fs    (66.1 u%)
    \o
    \o     mc1_tran: time = 725 ns      (72.5 %), step = 648 fs      (64.8 u%)
    \o
    \o     mc1_tran: time = 775 ns      (77.5 %), step = 639.2 fs    (63.9 u%)
    \o
    \o     mc1_tran: time = 825 ns      (82.5 %), step = 633.4 fs    (63.3 u%)
    \o
    \o     mc1_tran: time = 875 ns      (87.5 %), step = 629.8 fs      (63 u%)
    \o
    \o     mc1_tran: time = 925 ns      (92.5 %), step = 627.2 fs    (62.7 u%)
    \o
    \o     mc1_tran: time = 975 ns      (97.5 %), step = 625.7 fs    (62.6 u%)
    \o
    \o Number of accepted tran steps =             336439
    \o
    \o Initial condition solution time: CPU = 999 us, elapsed = 572.92 us.
    \o
    \o Intrinsic tran analysis time:    CPU = 51.3702 s, elapsed = 51.5583 s.
    \o
    \o Total time required for tran analysis `mc1_tran': CPU = 51.3862 s, elapsed =
    \o         51.5766 s.
    \o
    \o Time accumulated: CPU = 116.427 s (1m  56.4s), elapsed = 121.49 s (2m  1.5s).
    \o
    \o Peak resident memory used = 54.4 Mbytes.
    \o
    \o
    \o
    \o
    \o
    \o Notice from spectre during transient analysis `mc1_tran', during Monte Carlo
    \o
    \o         analysis `mc1'.
    \o
    \o     3 warnings suppressed.
    \o
    \o
    \o
    \o mc1_finalTimeOP: writing operating point information to rawfile.
    \o
    \o
    \o
    \o **********************
    \o DC Analysis `mc1_dcOp'
    \o **********************
    \o
    \o Important parameter values:
    \o
    \o     reltol = 1e-03
    \o
    \o     abstol(V) = 100 uV
    \o
    \o     abstol(I) = 10 fA
    \o
    \o     temp = 27 C
    \o
    \o     tnom = 27 C
    \o
    \o     tempeffects = all
    \o
    \o     gmindc = 1 pS
    \o
    \o Convergence achieved in 3 iterations.
    \o
    \o Total time required for dc analysis `mc1_dcOp': CPU = 3 ms, elapsed = 3.24082
    \o         ms.
    \o
    \o Time accumulated: CPU = 116.439 s (1m  56.4s), elapsed = 121.674 s (2m  1.7s).
    \o
    \o Peak resident memory used = 54.6 Mbytes.
    \o
    \o
    \o
    \o mc1_dcOpInfo: writing operating point information to rawfile.
    \o
    \o mc1_modelParameter: writing model parameter values to rawfile.
    \o
    \o mc1_element: writing instance parameter values to rawfile.
    \o
    \o mc1_outputParameter: writing output parameter values to rawfile.
    \o
    \o mc1_designParamVals: writing netlist parameters to rawfile.
    \o
    \o mc1_primitives: writing primitives to rawfile.
    \o
    \o mc1_subckts: writing subcircuits to rawfile.
    \o
    \o Total time required for montecarlo analysis `mc1': CPU = 114.97 s (1m  55.0s),
    \o         elapsed = 122.529 s (2m  2.5s).
    \o
    \o Time accumulated: CPU = 116.503 s (1m  56.5s), elapsed = 124.361 s (2m  4.4s).
    \o
    \o Peak resident memory used = 54.6 Mbytes.
    \o
    \o
    \o
    \o
    \o
    \o Aggregate audit (10:55:06 PM, Thur Dec 20, 2012):
    \o
    \o Time used: CPU = 117 s (1m  56.5s), elapsed = 124 s (2m  4.4s), util. = 93.6%.
    \o
    \o Time spent in licensing: elapsed = 243 ms.
    \o
    \o Peak memory used = 54.6 Mbytes.
    \o
    \o Simulation started at: 10:53:01 PM, Thur Dec 20, 2012, ended at: 10:55:06 PM,
    \o         Thur Dec 20, 2012, with elapsed time (wall clock): 124 s (2m  4.4s).
    \o
    \o spectre completes with 0 errors, 45 warnings, and 3 notices.
    \o
    \o simulation completed successfully.
    \o reading simulation data...
    \o       ...successful.
    \o Monte Carlo Simulation completed successfully...
    \o Errors with output expressions found:
    \o
    \o   "RISE_TIME" does not evaluate properly.

Reply

  • Sorry, the spectre.out doesn't show the error.

    Here I have pasted the CDS.log ( at the end) output.

    It says  "RISE_TIME" does not evaluate properly.

    Kind regards,

     

     

     

     

     

     Warning from spectre in `rnhr1000_mml130e', during circuit read-in.
    \o
    \o     WARNING (SFE-31):
    \o         "/home/manas/work_cad/UMC130FDKMFC_B08_PB/Models/Spectre/./MML130E_RES_V152.mdl.scs"
    \o
    \o         51: `rnhr1000_mml130e': Parameter `w' redefines parameter of same name
    \o         defined at higher level.
    \o
    \o Warning from spectre during hierarchy flattening.
    \o
    \o     WARNING (SFE-30): "input.scs" 57: C12: `mis_flag' is not a valid parameter
    \o         for an instance of `momcaps_asy_mm'.  Ignored.
    \o
    \o     WARNING (SFE-30): "input.scs" 59: C11: `mis_flag' is not a valid parameter
    \o         for an instance of `momcaps_asy_mm'.  Ignored.
    \o
    \o     WARNING (SFE-30): "input.scs" 61: C10: `mis_flag' is not a valid parameter
    \o         for an instance of `momcaps_asy_mm'.  Ignored.
    \o
    \o     WARNING (SFE-30): "input.scs" 63: C13: `mis_flag' is not a valid parameter
    \o         for an instance of `momcaps_asy_mm'.  Ignored.
    \o
    \o     WARNING (SFE-30): "input.scs" 65: R19: `mis_flag' is not a valid parameter
    \o         for an instance of `rnhr1000_mml130e'.  Ignored.
    \o
    \o         Further occurrences of this warning will be suppressed.
    \o
    \o
    \o
    \o
    \o Time for Elaboration: CPU = 52.992 ms, elapsed = 53.4849 ms.
    \o
    \o Time accumulated: CPU = 177.972 ms, elapsed = 396.798 ms.
    \o
    \o Peak resident memory used = 39.3 Mbytes.
    \o
    \o
    \o
    \o
    \o Time for EDB Visiting: CPU = 2.999 ms, elapsed = 2.42996 ms.
    \o
    \o Time accumulated: CPU = 180.971 ms, elapsed = 399.44 ms.
    \o
    \o Peak resident memory used = 39.7 Mbytes.
    \o
    \o
    \o
    \o
    \o
    \o Warning from spectre during initial setup.
    \o
    \o     WARNING (CMI-2424): NM3: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM4: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM2: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM0: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM5: `Acde' = 300e-03 is unusually small.
    \o
    \o         Further occurrences of this warning will be suppressed.
    \o
    \o
    \o
    \o
    \o Circuit inventory:
    \o               nodes 22
    \o
    \o             bsim3v3 8     
    \o
    \o           capacitor 32    
    \o
    \o                port 4     
    \o
    \o            quantity 9     
    \o
    \o              res_va 12    
    \o
    \o            resistor 4     
    \o
    \o                vcvs 4     
    \o
    \o             vsource 2     
    \o
    \o
    \o
    \o
    \o
    \o Notice from spectre.
    \o
    \o     22 warnings suppressed.
    \o
    \o
    \o
    \o
    \o
    \o Time for parsing: CPU = 1.35279 s, elapsed = 1.43158 s.
    \o
    \o Time accumulated: CPU = 1.53376 s, elapsed = 1.83122 s.
    \o
    \o Peak resident memory used = 52.8 Mbytes.
    \o
    \o
    \o
    \o
    \o ************************************************
    \o
    \o Monte Carlo Analysis `mc1': iteration = (1 -> 1)
    \o ************************************************
    \o
    \o awaiting artil process initialization ....
    \o
    \o Important parameter values:
    \o
    \o     seed = 1
    \o
    \o     numbins = 1
    \o
    \o     sampling = standard
    \o
    \o     variations = all
    \o
    \o     firstrun = 1
    \o     numruns = 1
    \o
    \o     donominal = yes
    \o
    \o
    \o
    \o Notice from spectre during Monte Carlo analysis `mc1'.
    \o
    \o     Out of 4 defined mismatch parameters, 2 is not referenced. There are 16
    \o         mismatch instances.
    \o
    \o
    \o
    \o
    \o **** Performing nominal run for `mc1'
    \o
    \o
    \o ***********************************************
    \o
    \o Transient Analysis `tran': time = (0 s -> 1 us)
    \o ***********************************************
    \o
    \o Important parameter values:
    \o
    \o     start = 0 s
    \o
    \o     outputstart = 0 s
    \o
    \o     stop = 1 us
    \o
    \o     step = 1 ns
    \o
    \o     maxstep = 5 ps
    \o
    \o     ic = all
    \o
    \o     useprevic = no
    \o
    \o     skipdc = no
    \o
    \o     reltol = 1e-03
    \o
    \o     abstol(V) = 100 uV
    \o
    \o     abstol(I) = 10 fA
    \o
    \o     temp = 27 C
    \o
    \o     tnom = 27 C
    \o
    \o     tempeffects = all
    \o
    \o     errpreset = moderate
    \o
    \o     method = euler
    \o
    \o     lteratio = 3.5
    \o
    \o     relref = sigglobal
    \o
    \o     cmin = 0 F
    \o
    \o     gmin = 1 pS
    \o
    \o
    \o
    \o     tran: time = 25 ns        (2.5 %), step = 684.6 fs    (68.5 u%)
    \o
    \o     tran: time = 75 ns        (7.5 %), step = 2.319 ps     (232 u%)
    \o
    \o     tran: time = 125 ns      (12.5 %), step = 2.342 ps     (234 u%)
    \o
    \o     tran: time = 175 ns      (17.5 %), step = 973.7 fs    (97.4 u%)
    \o
    \o     tran: time = 225 ns      (22.5 %), step = 1.496 ps     (150 u%)
    \o
    \o     tran: time = 275 ns      (27.5 %), step = 1.442 ps     (144 u%)
    \o
    \o     tran: time = 325 ns      (32.5 %), step = 549.8 fs      (55 u%)
    \o
    \o     tran: time = 375 ns      (37.5 %), step = 549.2 fs    (54.9 u%)
    \o
    \o     tran: time = 425 ns      (42.5 %), step = 548.8 fs    (54.9 u%)
    \o
    \o     tran: time = 475 ns      (47.5 %), step = 548.4 fs    (54.8 u%)
    \o
    \o     tran: time = 525 ns      (52.5 %), step = 548.2 fs    (54.8 u%)
    \o
    \o     tran: time = 575 ns      (57.5 %), step = 548 fs      (54.8 u%)
    \o
    \o     tran: time = 625 ns      (62.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 675 ns      (67.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 725 ns      (72.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 775 ns      (77.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 825 ns      (82.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 875 ns      (87.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 925 ns      (92.5 %), step = 625 fs      (62.5 u%)
    \o
    \o     tran: time = 975 ns      (97.5 %), step = 625 fs      (62.5 u%)
    \o
    \o Number of accepted tran steps =             419032
    \o
    \o Initial condition solution time: CPU = 0 s, elapsed = 846.148 us.
    \o
    \o Intrinsic tran analysis time:    CPU = 63.4044 s, elapsed = 63.5877 s.
    \o
    \o Total time required for tran analysis `tran': CPU = 63.4074 s (1m  3.4s),
    \o         elapsed = 63.59 s (1m  3.6s).
    \o
    \o Time accumulated: CPU = 64.9421 s (1m  4.9s), elapsed = 66.4327 s (1m  6.4s).
    \o
    \o Peak resident memory used = 53.9 Mbytes.
    \o
    \o
    \o
    \o finalTimeOP: writing operating point information to rawfile.
    \o
    \o
    \o ******************
    \o DC Analysis `dcOp'
    \o ******************
    \o
    \o Important parameter values:
    \o
    \o     reltol = 1e-03
    \o
    \o     abstol(V) = 100 uV
    \o
    \o     abstol(I) = 10 fA
    \o
    \o     temp = 27 C
    \o
    \o     tnom = 27 C
    \o
    \o     tempeffects = all
    \o
    \o     gmindc = 1 pS
    \o
    \o Convergence achieved in 3 iterations.
    \o
    \o Total time required for dc analysis `dcOp': CPU = 2.999 ms, elapsed = 3.30305
    \o         ms.
    \o
    \o Time accumulated: CPU = 64.9541 s (1m  5.0s), elapsed = 66.7037 s (1m  6.7s).
    \o
    \o Peak resident memory used = 54.1 Mbytes.
    \o
    \o
    \o
    \o dcOpInfo: writing operating point information to rawfile.
    \o
    \o modelParameter: writing model parameter values to rawfile.
    \o
    \o element: writing instance parameter values to rawfile.
    \o
    \o outputParameter: writing output parameter values to rawfile.
    \o
    \o designParamVals: writing netlist parameters to rawfile.
    \o
    \o primitives: writing primitives to rawfile.
    \o
    \o subckts: writing subcircuits to rawfile.
    \o
    \o Export:
    \o
    \o     RISE_TIME = 4.65336e-10
    \o Successfully evaluated export statements (based on return code).
    \o
    \o
    \o **** Performing monte carlo loop for `mc1'
    \o
    \o
    \o
    \o
    \o Warning from spectre during Monte Carlo analysis `mc1'.
    \o
    \o     WARNING (CMI-2424): NM3: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM4: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM2: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM0: `Acde' = 300e-03 is unusually small.
    \o
    \o     WARNING (CMI-2424): NM5: `Acde' = 300e-03 is unusually small.
    \o
    \o         Further occurrences of this warning will be suppressed.
    \o
    \o
    \o
    \o
    \o ***************************************************
    \o Transient Analysis `mc1_tran': time = (0 s -> 1 us)
    \o ***************************************************
    \o
    \o Important parameter values:
    \o
    \o     start = 0 s
    \o
    \o     outputstart = 0 s
    \o
    \o     stop = 1 us
    \o
    \o     step = 1 ns
    \o
    \o     maxstep = 5 ps
    \o
    \o     ic = all
    \o
    \o     useprevic = no
    \o
    \o     skipdc = no
    \o
    \o     reltol = 1e-03
    \o
    \o     abstol(V) = 100 uV
    \o
    \o     abstol(I) = 10 fA
    \o
    \o     temp = 27 C
    \o
    \o     tnom = 27 C
    \o
    \o     tempeffects = all
    \o
    \o     errpreset = moderate
    \o
    \o     method = euler
    \o
    \o     lteratio = 3.5
    \o     relref = sigglobal
    \o
    \o     cmin = 0 F
    \o
    \o     gmin = 1 pS
    \o
    \o
    \o
    \o     mc1_tran: time = 25 ns        (2.5 %), step = 2.869 ps     (287 u%)
    \o
    \o     mc1_tran: time = 75 ns        (7.5 %), step = 2.704 ps     (270 u%)
    \o
    \o     mc1_tran: time = 125 ns      (12.5 %), step = 674 fs      (67.4 u%)
    \o
    \o     mc1_tran: time = 175 ns      (17.5 %), step = 815.3 fs    (81.5 u%)
    \o
    \o     mc1_tran: time = 225 ns      (22.5 %), step = 690.5 fs    (69.1 u%)
    \o
    \o     mc1_tran: time = 275 ns      (27.5 %), step = 1.167 ps     (117 u%)
    \o
    \o     mc1_tran: time = 325 ns      (32.5 %), step = 1.091 ps     (109 u%)
    \o
    \o     mc1_tran: time = 375 ns      (37.5 %), step = 1.036 ps     (104 u%)
    \o
    \o     mc1_tran: time = 425 ns      (42.5 %), step = 1.002 ps     (100 u%)
    \o
    \o     mc1_tran: time = 475 ns      (47.5 %), step = 942.9 fs    (94.3 u%)
    \o
    \o     mc1_tran: time = 525 ns      (52.5 %), step = 768.3 fs    (76.8 u%)
    \o
    \o     mc1_tran: time = 575 ns      (57.5 %), step = 715.1 fs    (71.5 u%)
    \o
    \o     mc1_tran: time = 625 ns      (62.5 %), step = 682.1 fs    (68.2 u%)
    \o
    \o     mc1_tran: time = 675 ns      (67.5 %), step = 661.4 fs    (66.1 u%)
    \o
    \o     mc1_tran: time = 725 ns      (72.5 %), step = 648 fs      (64.8 u%)
    \o
    \o     mc1_tran: time = 775 ns      (77.5 %), step = 639.2 fs    (63.9 u%)
    \o
    \o     mc1_tran: time = 825 ns      (82.5 %), step = 633.4 fs    (63.3 u%)
    \o
    \o     mc1_tran: time = 875 ns      (87.5 %), step = 629.8 fs      (63 u%)
    \o
    \o     mc1_tran: time = 925 ns      (92.5 %), step = 627.2 fs    (62.7 u%)
    \o
    \o     mc1_tran: time = 975 ns      (97.5 %), step = 625.7 fs    (62.6 u%)
    \o
    \o Number of accepted tran steps =             336439
    \o
    \o Initial condition solution time: CPU = 999 us, elapsed = 572.92 us.
    \o
    \o Intrinsic tran analysis time:    CPU = 51.3702 s, elapsed = 51.5583 s.
    \o
    \o Total time required for tran analysis `mc1_tran': CPU = 51.3862 s, elapsed =
    \o         51.5766 s.
    \o
    \o Time accumulated: CPU = 116.427 s (1m  56.4s), elapsed = 121.49 s (2m  1.5s).
    \o
    \o Peak resident memory used = 54.4 Mbytes.
    \o
    \o
    \o
    \o
    \o
    \o Notice from spectre during transient analysis `mc1_tran', during Monte Carlo
    \o
    \o         analysis `mc1'.
    \o
    \o     3 warnings suppressed.
    \o
    \o
    \o
    \o mc1_finalTimeOP: writing operating point information to rawfile.
    \o
    \o
    \o
    \o **********************
    \o DC Analysis `mc1_dcOp'
    \o **********************
    \o
    \o Important parameter values:
    \o
    \o     reltol = 1e-03
    \o
    \o     abstol(V) = 100 uV
    \o
    \o     abstol(I) = 10 fA
    \o
    \o     temp = 27 C
    \o
    \o     tnom = 27 C
    \o
    \o     tempeffects = all
    \o
    \o     gmindc = 1 pS
    \o
    \o Convergence achieved in 3 iterations.
    \o
    \o Total time required for dc analysis `mc1_dcOp': CPU = 3 ms, elapsed = 3.24082
    \o         ms.
    \o
    \o Time accumulated: CPU = 116.439 s (1m  56.4s), elapsed = 121.674 s (2m  1.7s).
    \o
    \o Peak resident memory used = 54.6 Mbytes.
    \o
    \o
    \o
    \o mc1_dcOpInfo: writing operating point information to rawfile.
    \o
    \o mc1_modelParameter: writing model parameter values to rawfile.
    \o
    \o mc1_element: writing instance parameter values to rawfile.
    \o
    \o mc1_outputParameter: writing output parameter values to rawfile.
    \o
    \o mc1_designParamVals: writing netlist parameters to rawfile.
    \o
    \o mc1_primitives: writing primitives to rawfile.
    \o
    \o mc1_subckts: writing subcircuits to rawfile.
    \o
    \o Total time required for montecarlo analysis `mc1': CPU = 114.97 s (1m  55.0s),
    \o         elapsed = 122.529 s (2m  2.5s).
    \o
    \o Time accumulated: CPU = 116.503 s (1m  56.5s), elapsed = 124.361 s (2m  4.4s).
    \o
    \o Peak resident memory used = 54.6 Mbytes.
    \o
    \o
    \o
    \o
    \o
    \o Aggregate audit (10:55:06 PM, Thur Dec 20, 2012):
    \o
    \o Time used: CPU = 117 s (1m  56.5s), elapsed = 124 s (2m  4.4s), util. = 93.6%.
    \o
    \o Time spent in licensing: elapsed = 243 ms.
    \o
    \o Peak memory used = 54.6 Mbytes.
    \o
    \o Simulation started at: 10:53:01 PM, Thur Dec 20, 2012, ended at: 10:55:06 PM,
    \o         Thur Dec 20, 2012, with elapsed time (wall clock): 124 s (2m  4.4s).
    \o
    \o spectre completes with 0 errors, 45 warnings, and 3 notices.
    \o
    \o simulation completed successfully.
    \o reading simulation data...
    \o       ...successful.
    \o Monte Carlo Simulation completed successfully...
    \o Errors with output expressions found:
    \o
    \o   "RISE_TIME" does not evaluate properly.

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