JFET_Model:Junction Field Effect Transistor Model

Manuals >Netlist Translator for SPICE & Spectre >Chapter 8: Translating a Model
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JFET_Model:Junction Field Effect Transistor Model

The SPICE J model is translated to the ADS JFET_Model. For translation information on the JFET device, refer to JFET Device.

For more information on the ADS model, place the model in a schematic and choose Edit > Component > Edit Component Parameters to view the model parameters. You can also click Help in the component editor dialog box for additional information.

Example SPICE Command Line:


.model Jmodel1 NJF Vto=-2.0

SPICE Dialect and Netlist Syntax:

Spice2/3:

.model mname NJF | PJF [param=value]*

PSpice:

.model mname NJF | PJF [param=value]*

HSpice:

.model mname NJF | PJF LEVEL=1 [param=value]*

ADS Netlist Syntax:

model mname JFET NFET=[0|1] PFET=[0|1] [param=value]*

ADS Schematic Symbol:

Model Parameters:

For information on parameter format, refer to Using Parameter Mapping Tables to Understand a Translation.

Table 8-27. JFET_Model Parameters

ADS

Unit

Default

Spice2/3

PSpice

HSpice

Level=1

Vto
V
-2.0
x
x
x

Beta
A/V²
1e-4
x
x
x

Lambda
1/V
0.0
x
x
x

Rd
ohms
0.0
x
x
x

Rs
ohms
0.0
x
x
x

Is
A
1e-14
x
x
x

Cgs
F
0.0
x
x
x

Cgd
F
0.0
x
x
x

Pb
V
1.0
x
x
0.8 V

Fc

0.5
x
x
x

Tnom
°C
25
x
T_measured
-

Kf

0.0
x
x
x

Af

1.0
x
x
x

N

1.0
-
x
x

Isr
A
0.0
-
x
-

Nr

2.0
-
x
-

Alpha
1/V
0.0
-
x
-

Vk
V
0.0
-
x
-

M

0.5
-
x
MJ

Vtotc
V/°C
0.0
-
x
TVC

Betatce
%/°C
0.0
-
x
-

Xti

3.0
-
x
0.0