Version 4
SHEET 1 1012 1092
WIRE -240 352 -352 352
WIRE -96 352 -160 352
WIRE -32 352 -96 352
WIRE 0 352 -32 352
WIRE 256 352 96 352
WIRE -32 368 -32 352
WIRE 256 384 256 352
WIRE -352 432 -352 352
WIRE -32 464 -32 448
WIRE 64 464 64 400
WIRE 64 464 -32 464
WIRE 64 496 64 464
WIRE 256 528 256 464
WIRE -352 544 -352 512
WIRE 64 592 64 576
WIRE 64 704 64 672
FLAG -352 544 0
FLAG 256 528 0
FLAG 64 704 0
FLAG 256 352 out
FLAG -352 352 in
FLAG -96 352 in1
SYMBOL njf 0 400 R270
SYMATTR InstName J1
SYMATTR Value Jmmbfj310
SYMBOL voltage -352 416 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 3.556 20K)
SYMBOL res -144 336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 50
SYMBOL res 240 480 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL voltage 64 576 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value {VG}
SYMBOL res 48 592 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 47500
SYMBOL res -16 464 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value 47500
TEXT -400 992 Left 2 !.MODEL Jmmbfj310 njf\n+VTO=-4.16995 BETA=0.00260834 LAMBDA=0 RD=0.828616\n+RS=1.65723 IS=1e-14 CGS=5.80456e-12 CGD=5.80456e-12\n+PB=1.06503 FC=0.5 KF=1e-20 AF=0.2
TEXT -400 840 Left 2 !.tran 0 0.1m 0 0.1u
TEXT -400 920 Left 2 !.four 20k V(out)
TEXT -400 792 Left 2 !.step param VG -10 -2 0.5
TEXT -400 872 Left 2 !.options plotwinsize=0