Version 4
SHEET 1 928 680
WIRE 48 16 -112 16
WIRE 128 16 48 16
WIRE 368 16 128 16
WIRE 560 16 368 16
WIRE 368 32 368 16
WIRE 48 48 48 16
WIRE -112 112 -112 16
WIRE 368 144 368 112
WIRE 400 144 368 144
WIRE 400 160 400 144
WIRE 560 160 560 16
WIRE 128 176 128 16
WIRE 96 192 64 192
WIRE 224 208 160 208
WIRE 320 208 304 208
WIRE -112 224 -112 176
WIRE 48 224 48 128
WIRE 48 224 -112 224
WIRE 96 224 48 224
WIRE 128 240 128 224
WIRE 320 240 320 208
WIRE 352 240 320 240
WIRE -112 256 -112 224
WIRE 400 256 352 256
WIRE 400 272 400 256
WIRE 64 288 64 192
WIRE 352 288 352 256
WIRE 352 288 64 288
WIRE -112 368 -112 336
WIRE 128 368 128 240
WIRE 128 368 -112 368
WIRE 368 368 128 368
WIRE 400 368 400 352
WIRE 400 368 368 368
WIRE 560 368 560 240
WIRE 560 368 400 368
WIRE 368 416 368 368
FLAG 368 416 0
SYMBOL res 384 256 R0
SYMATTR InstName R1
SYMATTR Value 27
SYMBOL res -128 240 R0
SYMATTR InstName R2
SYMATTR Value 47k
SYMBOL res 208 192 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 29 60 VTop 2
SYMATTR InstName R3
SYMATTR Value 2200
SYMBOL voltage 560 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 26
SYMBOL res 352 16 R0
SYMATTR InstName R4
SYMATTR Value 750
SYMBOL res 32 32 R0
SYMATTR InstName R5
SYMATTR Value {R}
SYMBOL Opamps\\LM741 128 144 R0
WINDOW 3 4 125 Left 2
SYMATTR InstName U3
SYMBOL References\\LT1634-2.5 -112 144 R0
SYMATTR InstName U2
SYMBOL nmos 352 160 R0
SYMATTR InstName M2
SYMATTR Value Si4404DY
TEXT -120 400 Left 2 !.op
TEXT -120 432 Left 2 !.step param R 1 1000 25