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Nexxim Simulator >
Nexxim Component Models >
Resistors >
   Resistor Model       

Resistor Model

A resistor model allows for the inclusion of parasitic capacitances. If a parasitic capacitance is required, the equivalent circuit is as in the following diagram:

The syntax for the resistor .MODEL statement is:

.MODEL modelname R [modelparameter=val] ...

 


Resistor Model Parameters

Model Parameter

Description

Unit

Default

BULK

Reference node for parasitic capacitance

None

0 (Ground)

CAP

Default parasitic capacitance

Farad

0.0

CAPSW

Sidewall fringing capacitance

Farad/Meter

0.0

COX

Bottomwall capacitance

Farad/Meter2

0.0

CRATIO

Parasitic capacitance allocation ratio

None

0.5

DI

Relative dielectric constant

None

0.0

DLR

Difference between physical length and drawn length

Meter

0.0

DW

Difference between physical width and drawn width

Meter

0.0

RES

Default resistance

Ohm

0.0

RSH

Sheet resistance per square

Ohm/square

0.0

SCALM

Width and length scaling factor

None

1.0

SHRINK

Reduction scale factor

None

1.0

TC1C

1st-order temperature coefficient for capacitance

°K-1

0.0

TC1R

1st-order temperature coefficient for resistance

°K-1

0.0

TC2C

2nd-order temperature coefficient for capacitance

°K-2

0.0

TC2R

2nd-order temperature coefficient for resistance

°K-2

0.0

THICK

Dielectric thickness

Meter

0.0

TNOM

Nominal temperature

°C

25.0


 

Resistor Model Netlist Example

R1 1 2 resistor1 R=500 dtemp=30

.MODEL resistor1 R cratio=0.75 cap=10e-12

Rspan node35 node423 R=100 TC1R=0.1 TC2R=0.05




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