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Nexxim Simulator >
Nexxim Component Models >
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   W-Model Transmission Line, RLCG       

W-Model Transmission Line, RLCG

W-RLGC Model Netlist Syntax

The netlist format for a W-model transmission line with RLGC model type is:

.MODEL modelname W MODELTYPE=RLGC N=val

Lo=matrix_entries

Co=matrix_entries

[Ro=matrix_entries]

[Go=matrix_entries]

[Rs=matrix_entries]

[Gd=matrix_entries]

All of the input matrices are symmetrical, so the matrix_entries specify only the lower triangular matrix elements. The diagonal elements are the resistance, inductance, conductance, and capacitance (RLGC) values for each of the signal lines. For the Lo and Co matrices, diagonal elements are positive (non-zero). For the Ro, Rs, Go, and Gd matrices, diagonal elements can be positive or zero. The off-diagonal elements are mutual effect values. For the Lo and Ro matrices, off-diagonal elements can be positive or zero. For the Co, Go, and Gd matrices, off -diagonal elements can be negative or zero.

RLGC models with large matrix sizes are typically written in separate files and included into the netlist with an .INCLUDE or .LIB statement. See External Files in the Netlist File Format section for details.

The unit of length can be any unit as long as the L in the instance is in the same unit.

 


RLGC W-Model Parameters

Model Parameter

Description

Unit

Default

N

Number of signal lines

None

Required

Lo

Matrix of DC inductance per unit length

Henry

None

Co

Matrix of DC capacitance per unit length

Farad

None

Ro

Matrix of DC resistance per unit length

Ohm

None

Go

Matrix of DC conductance per unit length

Siemens

None

Rs

Matrix of frequency-dependent skin effect resistance per unit length

Ohm/Hertz½

None

Gd

Matrix of frequency-dependent dielectric loss conductance per unit length

Siemens/Hertz½

None


W-RLGC Model Netlist Example

.model test2d_w W modeltype=RLGC N=2

+ Lo=

+ 3.964542432094597e-007

+ 1.027885379257179e-007

+ 3.949500843672859e-007

+ Co=

+ 1.346852474191454e-010

+ -3.521195569886902e-011

+ 1.353506631279533e-010

+ Ro=

+ 0.001027851458885933

+ 0.0001657824933686929

+ 0.00102785145888604

+ Rs=

+ 1.357902308438043e-013

+ 1.867284066122683e-014

+ 1.369158440674621e-013

+ Gd=

+ 1.683520634126077e-011

+ -4.218325637497574e-012

+ 1.690051828177642e-011

 




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