Version 4
SHEET 1 880 972
WIRE 80 -48 -64 -48
WIRE 112 -48 80 -48
WIRE 176 -48 112 -48
WIRE 352 -48 256 -48
WIRE 80 -16 80 -48
WIRE -64 0 -64 -48
WIRE 352 64 352 -48
WIRE 80 144 80 64
WIRE 208 144 80 144
WIRE 304 144 208 144
WIRE 80 288 80 144
WIRE 176 288 80 288
WIRE 352 288 352 160
WIRE 352 288 256 288
FLAG -64 0 0
DATAFLAG 352 288 ""
DATAFLAG 352 -48 ""
DATAFLAG 112 -48 "I(Load)"
DATAFLAG 208 144 ""
SYMBOL voltage 80 80 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 450
SYMBOL res 272 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName RCalibration
SYMATTR Value 10k
SYMBOL res 272 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Load
SYMATTR Value 1000
SYMBOL nmos 304 64 R0
WINDOW 3 56 72 Invisible 2
WINDOW 38 56 100 Left 2
SYMATTR InstName M1
SYMATTR Value ""
SYMATTR SpiceModel IXTT20N50D
TEXT -120 288 Left 2 !.op
TEXT -432 -88 Left 2 !.MODEL IXTT20N50D NMOS\n+ LEVEL=3\n+ L=2.0000E-6\n+ W=5.5000\n+ KP=1.0446E-6\n+ RS=1.0000E-3\n+ RD=.22202\n+ VTO=-.89028\n+ RDS=20.000E6\n+ TOX=2.0000E-6\n+ CGSO=3.5684E-9\n+ CGDO=37.622E-12\n+ CBD=4.8729E-9\n+ MJ=1.5000\n+ PB=2.6055\n+ RG=10.000E-3\n+ IS=1.3714E-6\n+ N=2.0283\n+ RB=1.0000E-9\n+ GAMMA=0\n+ KAPPA=0\n*$