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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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