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CACD Group
updated 2003.03.27
Author Arpad Buermen

Simulator options (for inclusion in your netlist)

******************************************************************************
******************************************************************************
** Options, defaults
******************************************************************************
******************************************************************************
* Temperature
******************************************************************************
* Nominal temperature
*.options tnom=27
*
* Operating temperature
*.options temp=27
******************************************************************************
* Convergence and precision
******************************************************************************
* Minimum conductance
*.options gmin=1e-12
*
* Relative error tolerence
*.options reltol=1e-3
*
* Absolute error tolerence
*.options abstol=1e-12
*
* Voltage error tolerence
*.options vntol=1e-6
*
* Charge error tolerence
*.options chgtol=1e-14
*
* Truncation error overestimation factor
* SPICE3=7, XSPICE=1, smaller means more precise
* XSPICE changed the default from 7 to 1
*.options trtol=1
*
* Minimum acceptable pivot
*.options pivtol=1e-13
*
* Minimum acceptable ratio of pivot
*.options pivrel=1e-3
*
* Allow bypass of unchanging elements
*.options bypass=1
*
* DC iteration limit
*.options itl1=100
*
* DC transfer curve iteration limit
*.options itl2=50
*
* Lower transient iteration limit (has no effect)
*.options itl3=xxx
*
* Upper transient iteration limit
*.options itl4=10
*
* Total transient iteration limit (has no effect)
*.options itl5=xxx
*
* Number of source steps
*.options itl6=10
* also named
*.options srcsteps=10
*
* Number of Gmin steps
*.options gminsteps=10
*
* PZ iteration limit
*.options pziter=200
*
* Skip DC OP iterations, go directly to gmin stepping, 
*.options noopiter
*
* Skip source lifting  
*.options nosrclift
*
* Print source lifting messages
*.options srcldebug
*
* Maximum number of source lifting iterations
*.options srclmaxiter=5000
*
* Source lifting convergence test (number of constant iterations)
*.options srclconviter=50
*
* Number of source rising iterations (used only if scrlrisetime=0)
*.options srclriseiter=50
*
* Rise time in source lifting procedure
*.options srclrisetime=0
*
* Final stop time in source lifting procedure if convergence not achieved
*.options srclmaxtime=10
*
* Minimal step used in source lifting
*.options srclminstep=1e-15
*
* Integration method
* 1=trapezoidal, 2=gear
*.options method=1
*
* Maximum integration order
*.options maxord=2
*
* Denominator of first time step to solve the circuit at time t->0
* 0=off
*.options icstep=0
*
* Minimum time between breakpoints
*.options minbreak=no default
*
* Record operating point for each small-signal analysis
*.options keepopinfo
******************************************************************************
* XSPICE options 
******************************************************************************
* Maximum analog/event alternations in DCOP
*.options maxopalter=nr_of_outputs_on_hybrids+1
*
* Maximum event iterations at analysis point
*.options maxevtiter=nr_of_event_driven_outputs+1
*
* Do not do analog/event alternation in DCOP
*.options noopalter
*
* Transient analysis supply ramping time
* 0=off
*.options ramptime=0
*
* Enable convergence assistance on code models
*.options convlimit
*
* Fractional step allowed by code model inputs between iterations
*.options convstep=0.25
*
* Absolute step allowed by code model inputs between iterations
*.options convabsstep=0.1
*
* Use auto-partial computation for all models
*.options autopartial
*
* Shunt resistance from analog nodes to ground
*.options rshunt=no default
*
******************************************************************************
* SPICE3 models
******************************************************************************
* Default MOSfet length
*.options defl=100u
*
* Default MOSfet width
*.options defw=100u
*
* Default MOSfet area of drain
*.options defad=0
*
* Default MOSfet area of source
*.options defas=0
*
* Scale factor for instance metric parameters
*.options scale=1
*
* Use old mos3 model (discontinuous with respect to kappa)
*.options badmos3
*
* Try compaction for LTRA lines
*.options trytocompact 
*
******************************************************************************
* Obsolete
******************************************************************************
* Print accounting
*.options acct
*
* Print a listing
*.options list
*
* Don't print a model summary
*.options nomod
*
* Don't insert page breaks
*.options nopage
*
* Print a node connection summary
*.options node
*
* Print a list of the options
*.options opts
*
* Use SPICE2 MOSfet limiting
*.options oldlimit
*
* Set number of digits printed
*.options numdgt
*
* Total cpu time in seconds
*.options cptime
*
* Time to reserve for output
*.options limtim
*
* Maximum points per analysis
*.options limpts
*
* Generate machine code
*.options lvlcod
*
* Type of timestep control
*.options lvltim
*

******************************************************************************
* Statistics, read-only, integer
******************************************************************************
*  totiter       ... Total iterations
*  traniter      ... Transient iterations
*  equations     ... Circuit Equations
*  tranpoints    ... Transient timepoints
*  accept        ... Accepted timepoints
*  rejected      ... Rejected timepoints
*  trancuriters  ... Transient iters per point
*
******************************************************************************
* Statistics, read-only, real
******************************************************************************
*  time          ... Total Analysis Time
*  trantime      ... Transient time
*  reordertime   ... Matrix reordering time
*  lutime        ... L-U decomposition time
*  solvetime     ... Matrix solve time
*  tranlutime    ... transient L-U decomp time
*  transolvetime ... Transient solve time
*  loadtime      ... Load time
******************************************************************************
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