O. Lossy Transmission Line

Symbol Name: LTLIN

Syntax: Oxxx L+ L- R+ R- <model>

Example:

O1 in 0 out 0 MyLossyTline
.model MyLossyTline LTRA(len=1 R=10 L=1u C=10n)

This is a single-conductor lossy transmission line. N1 and N2 are the nodes at port 1. N3 and N4 are the nodes at port 2. A model card is required to define the electrical characteristics of this circuit element.

Model parameters for Lossy Transmission Lines

NameDescriptionUnits/TypeDefault
RResistance per unit lengthΩ0.
LInductance per unit lengthH0.
GConductivity per unit length1/Ω0.
CCapacitance per unit lengthF0.
LenNumber of unit lengths-0.
RelRelative rate of change of derivative to set a breakpoint 1.
AbsAbsolute rate of change of derivative to set a breakpoint 1.
NoStepLimitDon't limit time- step to less than line delay(flag)not set
NoControlDon't attempt complex time-step control(flag)not set
LinInterpUse linear interpolation(flag)not set
MixedInterpUse linear interpolation when quadratic seems to fail(flag)not set
CompactRelReltol for history compaction RELTOL
CompactAbsAbstol for history compaction ABSTOL
TruncNrUse Newton-Raphson method for time-step control(flag)not set
TruncDontCutDon't limit time-step to keep impulse-response errors low(flag)not set