Version 4
SHEET 1 900 680
WIRE 144 -176 64 -176
WIRE 288 -176 208 -176
WIRE 64 -80 64 -176
WIRE 144 -80 64 -80
WIRE 288 -80 288 -176
WIRE 288 -80 208 -80
WIRE 64 16 64 -80
WIRE 128 16 64 16
WIRE 288 16 288 -80
WIRE 288 16 208 16
WIRE 352 16 288 16
WIRE -352 32 -480 32
WIRE -224 32 -224 -16
WIRE -224 32 -352 32
WIRE 64 48 64 16
WIRE -224 64 -224 32
WIRE 192 144 192 112
WIRE 64 160 64 128
WIRE 112 160 64 160
WIRE 160 160 112 160
WIRE 288 176 288 16
WIRE 288 176 224 176
WIRE 336 176 288 176
WIRE 448 176 416 176
WIRE 496 176 448 176
WIRE 608 176 576 176
WIRE 656 176 608 176
WIRE 768 176 736 176
WIRE 864 176 768 176
WIRE -224 192 -224 144
WIRE -128 192 -224 192
WIRE -16 192 -128 192
WIRE 160 192 -16 192
WIRE -480 208 -480 32
WIRE 448 208 448 176
WIRE 608 208 608 176
WIRE 768 208 768 176
WIRE -224 224 -224 192
WIRE -352 240 -352 32
WIRE -128 240 -128 192
WIRE 192 240 192 208
WIRE 448 304 448 272
WIRE 608 304 608 272
WIRE 768 304 768 272
WIRE -480 336 -480 288
WIRE -352 336 -352 304
WIRE -224 336 -224 304
WIRE -128 336 -128 304
WIRE 64 368 64 160
WIRE 864 368 864 176
WIRE 864 368 64 368
FLAG 192 112 V+
FLAG 448 304 0
FLAG 608 304 0
FLAG 768 304 0
FLAG -224 336 0
FLAG 192 240 0
FLAG -224 -16 V+
FLAG -128 336 0
FLAG -352 336 0
FLAG -480 336 0
FLAG 352 16 out
IOPIN 352 16 Out
FLAG -16 192 ref
FLAG 112 160 in
SYMBOL Misc\\EuropeanResistor 320 192 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 480 192 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 640 192 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL cap 432 208 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 592 208 R0
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL cap 752 208 R0
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL Misc\\EuropeanResistor 112 32 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL diode 144 -64 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 208 -192 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL Misc\\EuropeanResistor 48 144 M180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R4
SYMATTR Value 200k
SYMBOL Misc\\EuropeanResistor -240 48 R0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor -240 208 R0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL polcap -144 240 R0
SYMATTR InstName C4
SYMATTR Value 100µ IC=4.5
SYMBOL polcap -368 240 R0
SYMATTR InstName C5
SYMATTR Value 100µ
SYMBOL Misc\\battery -480 192 R0
SYMATTR InstName V1
SYMATTR Value 9
SYMBOL Opamps\\LT1012 192 112 R0
SYMATTR InstName U1
TEXT -456 -352 Left 2 !.tran 0 60m 0 10u startup
TEXT -456 -320 Left 2 !.options plotwinsize=0