The JFET (Junction Field-Effect Transistor) is a three-terminal semiconductor device controlled by a voltage applied to the gate-source junction.
J<name> <drain> <gate> <source> <model_name> [<area>] [OFF] [IC=<vds>[,<vgs>]]
| Parameter |
Description |
drain |
Drain node |
gate |
Gate node |
source |
Source node |
model_name |
Name of a .MODEL NJF(...) or .MODEL PJF(...) definition |
area |
Area factor |
OFF |
Initial guess: device is off |
IC=vds[,vgs] |
Initial junction voltages for UIC |
J1 DRAIN GATE SOURCE J2N3819
J2 D G S my_njfet 2.0
.MODEL J2N3819 NJF(VTO=-3 BETA=1.304m LAMBDA=2.25m IS=33.57f CGS=2.414p CGD=0.3p)
| Parameter |
Description |
VTO |
Pinch-off voltage |
BETA |
Transconductance coefficient |
LAMBDA |
Channel-length modulation |
IS |
Gate junction saturation current |
CGS |
Gate-source capacitance |
CGD |
Gate-drain capacitance |
RD |
Drain resistance |
RS |
Source resistance |