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Nexxim Simulator >
Nexxim Component Models >
FETs (JFETs and MESFETs) >
Parker-Skellern PSFET Model (Level 18)

Parker-Skellern PSFET Model (Level 18)

The .MODEL statement for the Level 18 Parker-Skellern PSFET Transistor model specifies values for one or more model parameters.

.MODEL modelname NJF LEVEL=18 [modelparameter=]val] ...

.MODEL modelname PJF LEVEL=18 [modelparameter=]val] ...

LEVEL=18 specifies the Parker-Skellern PSFET model.

**Level 18 PSFET Basic Model Parameters**
Model Parameter	Description	Unit	Default
LEVEL	18 is required to select the Parker-Skellern PSFET model	None	1 (default if LEVEL parameter is omitted)
ACGAM	Capacitance modulation parameter	None	0.0
BETA	Linear region transconductance scale factor	None	1e-4
CGD	Zero-bias gate-drain capacitance	Farad	0.0
CGS	Zero-bias gate-source capacitance	Farad	0.0
DELTA	Thermal reduction coefficient	1/Watt	0.0
FC	Forward-bias capacitance parameter	None	0.5
HFETA	High-frequency Vgs feedback parameter	None	0.0
HFE1	HFETA modulation by Vgd	1/Volt	0.0
HFE2	HFETA modulation by Vgs	1/Volt	0.0
HFGAM	High-frequency Vgd feedback parameter	None	0.0
HFG1	HFGAM modulation by Vsg	1/Volt	0.0
HFG2	HFGAM modulation by Vdg	1/Volt	0.0
IBD	Gate-junction breakdown current	Ampere	0.0
IS	Gate-junction saturation current	Ampere	1.0e-14
LFGAM	Low-frequency Vgd feedback parameter	None	0.0
LFG1	LFGAM modulation by Vsg	1/Volt	0.0
LFG2	LFGAM modulation by Vdg	1/Volt	0.0
MVST	Subthreshold modulation	1/Volt	0.0
N	Gate-junction ideality factor	None	1.0
P	Linear region power law exponent	None	2.0
Q	Saturated region power law exponent	None	2.0
RS	Source ohmic resistance	Ohm	0.0
RD	Drain ohmic resistance	Ohm	0.0
TAUD	Relaxation time for thermal reduction	Second	0.0
TAUG	Relaxation time for gamma feedback	Second	0.0
VBD	Gate-junction breakdown potential	Volt	1.0
VBI	Gate-junction potential	Volt	1.0
VST	Subthreshold potential	Volt	0.0
VTO	Subthreshold voltage	Volt	-2.0
XC	Capacitance pinchoff reduction factor	None	0.0
XI	Saturation-knee potential factor	None	1000.0
Z	Knee transition parameter	None	0.5
RG	Gate ohmic resistance	Ohm	0.0
LG	Gate inductance	Henry	0.0
LS	Source inductance	Henry	0.0
LD	Drain inductance	Henry	0.0
CDSS	Fixed drain-source capacitance	Farad	0.0
AFAC	Gate width scale factor	None	1.0
NFING	Number of gate fingers scale factor	None	1.0
TNOM	Nominal temperature	°K	300
TEMP	Temperature	°K	300

PSFET Model Netlist Example

.MODEL psfet18 NJF LEVEL=18

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