Version 4
SHEET 1 880 680
WIRE 208 -96 192 -96
WIRE 336 -96 288 -96
WIRE -176 96 -240 96
WIRE 32 96 -176 96
WIRE 192 96 192 -96
WIRE 192 96 112 96
WIRE 208 96 192 96
WIRE 336 112 336 -96
WIRE 336 112 272 112
WIRE 208 128 112 128
WIRE -176 192 -176 96
WIRE -144 192 -176 192
WIRE -128 192 -144 192
WIRE -16 192 -64 192
WIRE 32 192 -16 192
WIRE 112 192 112 128
WIRE -16 288 -16 192
WIRE -64 368 -144 368
FLAG -320 96 0
FLAG 240 0 0
FLAG 240 224 0
FLAG -16 384 0
FLAG -224 368 0
SYMBOL res 128 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL voltage -224 96 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 240 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value -20
SYMBOL voltage 240 -16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value -20
SYMBOL res 304 -112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 20k
SYMBOL Opamps\\UniversalOpamp2 240 112 R0
SYMATTR InstName U1
SYMBOL res 128 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res -48 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL nmos -64 288 R0
SYMATTR InstName M1
SYMATTR Value IPT004N03L
SYMBOL voltage -128 368 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 0
TEXT -344 472 Left 2 !.tran 0.1
TEXT -240 448 Left 2 ;Vcontrol: 5V is Inverting, 0V is non-Inverting