Version 4
SHEET 1 880 680
WIRE -9872 -3920 -9920 -3920
WIRE -9776 -3904 -9808 -3904
WIRE -9680 -3904 -9712 -3904
WIRE -9616 -3904 -9680 -3904
WIRE -9392 -3904 -9392 -3936
WIRE -9872 -3888 -9904 -3888
WIRE -9616 -3888 -9616 -3904
WIRE -9904 -3840 -9904 -3888
WIRE -9712 -3840 -9712 -3904
WIRE -9712 -3840 -9904 -3840
WIRE -9920 -3824 -9920 -3920
WIRE -9792 -3824 -9920 -3824
WIRE -9616 -3792 -9616 -3808
WIRE -9536 -3792 -9536 -3856
WIRE -9536 -3792 -9616 -3792
WIRE -9392 -3792 -9392 -3808
WIRE -9360 -3792 -9392 -3792
WIRE -9264 -3792 -9280 -3792
WIRE -9184 -3792 -9200 -3792
WIRE -9616 -3776 -9616 -3792
WIRE -9392 -3776 -9392 -3792
WIRE -9680 -3760 -9680 -3840
WIRE -9680 -3760 -9728 -3760
WIRE -9824 -3744 -9968 -3744
WIRE -9792 -3744 -9792 -3824
WIRE -9792 -3744 -9824 -3744
WIRE -9968 -3728 -9968 -3744
WIRE -9728 -3728 -9728 -3760
WIRE -9968 -3632 -9968 -3648
WIRE -9792 -3632 -9792 -3744
WIRE -9568 -3632 -9792 -3632
WIRE -9184 -3632 -9184 -3792
WIRE -9184 -3632 -9488 -3632
WIRE -9152 -3632 -9184 -3632
WIRE -9392 -3584 -9392 -3600
WIRE -9616 -3568 -9616 -3696
WIRE -9792 -3488 -9792 -3632
WIRE -9792 -3488 -9904 -3488
WIRE -9392 -3488 -9392 -3504
WIRE -9360 -3488 -9392 -3488
WIRE -9264 -3488 -9280 -3488
WIRE -9184 -3488 -9184 -3632
WIRE -9184 -3488 -9200 -3488
WIRE -9392 -3472 -9392 -3488
WIRE -9616 -3456 -9616 -3488
WIRE -9552 -3456 -9616 -3456
WIRE -9680 -3440 -9680 -3760
WIRE -9616 -3440 -9616 -3456
WIRE -9904 -3424 -9904 -3488
WIRE -9872 -3424 -9904 -3424
WIRE -9552 -3424 -9552 -3456
WIRE -9536 -3424 -9552 -3424
WIRE -10016 -3408 -10032 -3408
WIRE -9776 -3408 -9808 -3408
WIRE -10032 -3392 -10032 -3408
WIRE -9872 -3392 -9904 -3392
WIRE -9904 -3344 -9904 -3392
WIRE -9712 -3344 -9712 -3408
WIRE -9712 -3344 -9904 -3344
WIRE -9680 -3344 -9680 -3376
WIRE -9680 -3344 -9712 -3344
WIRE -9616 -3344 -9616 -3360
WIRE -9616 -3344 -9680 -3344
WIRE -9392 -3312 -9392 -3376
WIRE -10032 -3296 -10032 -3312
WIRE -9984 -3296 -10032 -3296
WIRE -10032 -3280 -10032 -3296
WIRE -10032 -3184 -10032 -3200
WIRE -10016 -3184 -10032 -3184
FLAG -9968 -3632 0
FLAG -9984 -3296 0
FLAG -9392 -3312 -15V
FLAG -10016 -3408 15V
FLAG -10016 -3184 -15V
FLAG -9392 -3696 -15V
FLAG -9392 -3936 15V
FLAG -9392 -3600 15V
FLAG -9152 -3632 out
FLAG -9840 -3440 -15V
FLAG -9840 -3936 -15V
FLAG -9840 -3872 15V
FLAG -9840 -3376 15V
FLAG -9728 -3728 0
FLAG -9824 -3744 in
SYMBOL voltage -10032 -3408 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -65 102 Left 2
WINDOW 0 -58 11 Left 2
SYMATTR Value 15V
SYMATTR InstName V1
SYMBOL voltage -10032 -3296 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 -56 26 Left 2
WINDOW 3 -60 94 Left 2
SYMATTR InstName V2
SYMATTR Value 15V
SYMBOL diode -9712 -3424 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL pnp -9456 -3376 M180
WINDOW 0 53 61 Left 2
WINDOW 3 51 38 Left 2
SYMATTR InstName Q2
SYMATTR Value BC557C
SYMBOL Misc\\EuropeanResistor -9440 -3440 R90
WINDOW 0 1 80 VBottom 2
WINDOW 3 -18 42 VTop 2
SYMATTR InstName R8
SYMATTR Value 4.7K
SYMBOL Misc\\EuropeanResistor -9376 -3488 R180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R9
SYMATTR Value 4.7K
SYMBOL voltage -9968 -3744 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -69 144 Left 2
WINDOW 0 -58 11 Left 2
SYMATTR Value SINE(0 2 1k 0 0 0)
SYMATTR InstName Vin
SYMBOL cap -9696 -3440 R0
SYMATTR InstName C4
SYMATTR Value 1µ
SYMBOL Misc\\EuropeanResistor -9584 -3616 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 4.7k
SYMBOL cap -9696 -3904 R0
WINDOW 0 34 14 Left 2
WINDOW 3 34 49 Left 2
SYMATTR InstName C3
SYMATTR Value 1µ
SYMBOL Misc\\EuropeanResistor -9440 -3872 R90
WINDOW 0 0 71 VBottom 2
WINDOW 3 -17 36 VTop 2
SYMATTR InstName R6
SYMATTR Value 4.7K
SYMBOL Misc\\EuropeanResistor -9376 -3680 R180
WINDOW 0 33 65 Left 2
WINDOW 3 32 43 Left 2
SYMATTR InstName R7
SYMATTR Value 4.7K
SYMBOL npn -9456 -3904 R0
WINDOW 3 56 54 Left 2
SYMATTR Value BC547C
SYMATTR InstName Q1
SYMBOL diode -9200 -3808 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL diode -9264 -3504 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL Misc\\EuropeanResistor -9632 -3904 R0
SYMATTR InstName R1
SYMATTR Value 20K
SYMBOL Misc\\EuropeanResistor -9632 -3792 R0
SYMATTR InstName R2
SYMATTR Value 80K
SYMBOL Misc\\EuropeanResistor -9632 -3456 R0
SYMATTR InstName R3
SYMATTR Value 20K
SYMBOL Misc\\EuropeanResistor -9632 -3584 R0
SYMATTR InstName R4
SYMATTR Value 80K
SYMBOL Misc\\EuropeanResistor -9264 -3808 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 1K
SYMBOL Misc\\EuropeanResistor -9264 -3504 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 2K2
SYMBOL diode -9776 -3888 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL Opamps\\OP27 -9840 -3840 M180
SYMATTR InstName U1
SYMBOL Opamps\\OP27 -9840 -3344 M180
SYMATTR InstName U2
TEXT -10040 -3560 Left 2 !.tran 0 12.5ms 0 50µ