| Keyword | Data Type | Default Value | Description |
|---|
| abstol | Num. | 1pA | Absolute current error tolerance. |
| baudrate | Num. | (none) | Used for eye diagrams. Tells the waveform viewer how
to wrap the abscissa time to overlay the bit transitions. |
| chgtol | Num. | 10fC | Absolute charge tolerance. |
| cshunt | Num. | 0. | Optional capacitance added from every node to ground. |
| cshuntintern | Num. | cshunt | Optional capacitance added from every device internal
node to ground. |
| defad | Num. | 0. | Default MOS drain diffusion area. |
| defas | Num. | 0. | Default MOS source diffusion area. |
| defl | Num. | 100µm | Default MOS channel length. |
| defw | Num. | 100µm | Default MOS channel width. |
| delay | Num. | 0. | Used for eye diagrams. Shifts the bit transitions in
the diagram. |
| fastaccess | flag | false | Convert to fastaccess file format at end of simulation. |
| flagloads | flag | false | Flags external current sources as loads. |
| Gmin | Num. | 1e-12 | Conductance added to every PN junction to aid convergence. |
| gminsteps | Num. | 25 | Set to zero to prevent gminstepping for the initial
DC solution. |
| gshunt | Num. | 0 | Optional conductance added from every node to ground. |
| itl1 | Num. | 100 | DC iteration count limit. |
| itl12 | Num. | 50 | DC transfer curve iteration count limit. |
| itl14 | Num. | 10 | Transient analysis time point iteration count limit. |
| itl16 | Num. | 25 | Set to zero to prevent source stepping for the initial
DC solution. |
| srcsteps | Num. | 25 | Alternative name for itl6. |
| maxclocks | Num. | Infin. | maximum number of clock cycles to save. |
| maxstep | Num. | Infin. | Maximum step size for transient analysis. |
| meascplxfmt | string | bode | Complex number format of .meas statement results. One
of "polar", "cartesian", or "bode". |
| measdgt | Num. | 6 | Number of significant figures used for .measure statement
output. |
| method | string | trap | Numerical integration method, either trapezoidal or
Gear. |
| minclocks | Num. | 10 | minimum number of clock cycles to save. |
| MinDeltaGmin | Num. | 1e-4 | Sets a limit for termination of adaptive gmin stepping. |
| MinDeltaGmin | Num. | 1e-4 | Sets a limit for termination of adaptive gmin stepping. |
| nomarch | flag | false | Do not plot marching waveforms. |
| noopiter | flag | false | Go directly to gmin stepping. |
| numdgt | Num. | 6 | Historically "numdgt" was used to set the
number of significant figures used for output data. In
LTspice, if "numdgt" is set to be > 6, double
precision is used for dependent variable data. |
| pivrel | Num. | 1e-3 | Relative ratio between the largest column entry and
an acceptable pivot value. |
| pivtol | Num. | 1e-13 | Absolute minimum value for a matrix entry to be accepted
as a pivot. |
| reltol | Num. | .001 | Relative error tolerance. |
| srcstepmethod | Num. | 0 | Which source stepping algorithm to start with. |
| sstol | Num. | .001 | Relative error for steady-state detection. |
| startclocks | Num. | 5 | Number of clock cycles to wait before looking for steady
state. |
| temp | Num. | 27ºC | Default temperature for circuit element instances that
don't specify temperature. |
| tnom | Num. | 27ºC | Default temperature at which device parameters were
measured for models that don't specify this temperature. |
| topologycheck | Num. | 1 | Set to zero to skip check for floating nodes, loops
of voltage sources, and non-physical transformer winding
topology. |
| trtol | Num. | 1.0 | Set the transient error tolerance. This parameter is
an estimate of the factor by which the actual truncation
error is overestimated. |
| trytocompact | Num. | 1 | When non-zero, the simulator tries to condense LTRA
transmission lines' history of input voltages and currents. |
| vntol | Num. | 1µV | Sets the absolute voltage error tolerance. |
| plotreltol | Num. | .0025 | Sets the relative error tolerance for waveform compression. |
| plotvntol | Num. | 10µV | Sets the absolute voltage error tolerance for waveform
compression. |
| plotabstol | Num. | 1nA | Sets the absolute current error tolerance for waveform
compression. |
| plotwinsize | Num. | 300 | Number of data points to compress in one window. Set
to zero to disable compression. |
| ptrantau | Num. | .1 | Characteristic source start-up time for a damped pseudo
transient analysis to find the operating point. Set to
zero to disable pseudo transient. |
| ptranmax | Num. | 0 | If set non-zero, that time of the damped pseudo transient
analysis is used as the operating point whether the circuit
has settled or not. |
