O. Lossy Transmission Line
Symbol Name: LTLINE
Syntax:
Oxxx L+ L- R+ R- <model>|<string expression>
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
| Name | Description | Units/Type | Default |
|---|---|---|---|
| R | Resistance per unit length | Ω | 0. |
| L | Inductance per unit length | H | 0. |
| G | Conductivity per unit length | 1/Ω | 0. |
| C | Capacitance per unit length | F | 0. |
| Len | Number of unit lengths | - | 0. |
| Rel | Relative rate of change of derivative to set a breakpoint | 1. | |
| Abs | Absolute rate of change of derivative to set a breakpoint | 1. | |
| NoStepLimit | Don't limit time- step to less than line delay | (flag) | not set |
| NoControl | Don't attempt complex time-step control | (flag) | not set |
| LinInterp | Use linear interpolation | (flag) | not set |
| MixedInterp | Use linear interpolation when quadratic seems to fail | (flag) | not set |
| CompactRel | Reltol for history compaction | RELTOL | |
| CompactAbs | Abstol for history compaction | ABSTOL | |
| TruncNr | Use Newton-Raphson method for time-step control | (flag) | not set |
| TruncDontCut | Don't limit time-step to keep impulse-response errors low | (flag) | not set |