Version 4
SHEET 1 880 680
WIRE 240 0 224 0
WIRE 240 16 240 0
WIRE 320 96 240 96
WIRE 496 96 400 96
WIRE 368 192 352 192
WIRE 368 208 368 192
WIRE 240 224 240 96
WIRE 336 224 240 224
WIRE 496 240 496 96
WIRE 496 240 400 240
WIRE 512 240 496 240
WIRE -64 256 -80 256
WIRE 112 256 32 256
WIRE 336 256 112 256
WIRE -80 288 -80 256
WIRE 32 288 32 256
WIRE 112 288 112 256
WIRE 240 288 240 224
WIRE 496 288 496 240
WIRE 368 368 368 272
FLAG -80 368 0
FLAG 32 368 0
FLAG 112 368 0
FLAG 240 368 0
FLAG 368 368 0
FLAG 496 368 0
FLAG 512 240 0bis10V
FLAG 352 192 15V
FLAG -64 256 15V
FLAG 224 0 15V
SYMBOL res 224 0 R0
WINDOW 3 -36 49 Left 2
SYMATTR InstName R1
SYMATTR Value 260k
SYMBOL res 224 272 R0
SYMATTR InstName R2
SYMATTR Value 30k
SYMBOL res 96 272 R0
SYMATTR InstName R3
SYMATTR Value 240
SYMBOL res 416 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 43k
SYMBOL voltage -80 272 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL current 32 368 R180
WINDOW 0 24 80 Left 2
WINDOW 3 -176 157 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I1
SYMATTR Value PULSE(4m 20m 5m 20m 20m 10m 50m 1)
SYMBOL Opamps\\opamp2 368 176 R0
WINDOW 3 14 101 Left 2
SYMATTR InstName U1
SYMATTR Value LM358/NS
SYMBOL res 480 272 R0
SYMATTR InstName R5
SYMATTR Value 1k
TEXT -10 184 Left 2 !.tran 0 60m 1m startup uic
TEXT -8 152 Left 2 !.include LM358.txt