Version 4
SHEET 1 880 680
WIRE -9600 -4064 -9600 -4112
WIRE -9664 -4016 -9728 -4016
WIRE -9424 -4016 -9424 -4064
WIRE -9552 -3968 -9600 -3968
WIRE -9488 -3968 -9552 -3968
WIRE -9552 -3920 -9552 -3968
WIRE -9424 -3904 -9424 -3920
WIRE -9344 -3904 -9424 -3904
WIRE -9280 -3904 -9344 -3904
WIRE -9056 -3904 -9056 -3936
WIRE -9280 -3888 -9280 -3904
WIRE -9552 -3792 -9552 -3840
WIRE -9280 -3792 -9280 -3808
WIRE -9200 -3792 -9200 -3856
WIRE -9200 -3792 -9280 -3792
WIRE -9056 -3792 -9056 -3808
WIRE -8992 -3792 -9056 -3792
WIRE -8864 -3792 -8912 -3792
WIRE -8784 -3792 -8800 -3792
WIRE -9280 -3776 -9280 -3792
WIRE -9056 -3776 -9056 -3792
WIRE -9344 -3760 -9344 -3840
WIRE -9344 -3760 -9392 -3760
WIRE -9392 -3728 -9392 -3760
WIRE -8784 -3680 -8784 -3792
WIRE -9952 -3664 -10032 -3664
WIRE -9728 -3664 -9728 -4016
WIRE -9728 -3664 -9952 -3664
WIRE -9456 -3664 -9728 -3664
WIRE -10032 -3648 -10032 -3664
WIRE -9456 -3632 -9456 -3664
WIRE -9232 -3632 -9456 -3632
WIRE -8784 -3632 -8784 -3680
WIRE -8784 -3632 -9152 -3632
WIRE -9040 -3584 -9056 -3584
WIRE -9280 -3568 -9280 -3696
WIRE -10032 -3552 -10032 -3568
WIRE -9456 -3488 -9456 -3632
WIRE -9456 -3488 -9616 -3488
WIRE -9056 -3488 -9056 -3504
WIRE -8992 -3488 -9056 -3488
WIRE -8864 -3488 -8912 -3488
WIRE -8784 -3488 -8784 -3632
WIRE -8784 -3488 -8800 -3488
WIRE -9056 -3472 -9056 -3488
WIRE -9280 -3456 -9280 -3488
WIRE -9216 -3456 -9280 -3456
WIRE -9344 -3440 -9344 -3760
WIRE -9280 -3440 -9280 -3456
WIRE -9616 -3424 -9616 -3488
WIRE -9536 -3424 -9616 -3424
WIRE -9216 -3424 -9216 -3456
WIRE -9200 -3424 -9216 -3424
WIRE -10016 -3408 -10032 -3408
WIRE -9440 -3408 -9472 -3408
WIRE -10032 -3392 -10032 -3408
WIRE -9536 -3392 -9568 -3392
WIRE -9568 -3344 -9568 -3392
WIRE -9376 -3344 -9376 -3408
WIRE -9376 -3344 -9568 -3344
WIRE -9344 -3344 -9344 -3376
WIRE -9344 -3344 -9376 -3344
WIRE -9280 -3344 -9280 -3360
WIRE -9280 -3344 -9344 -3344
WIRE -9056 -3312 -9056 -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 -10032 -3552 0
FLAG -9984 -3296 0
FLAG -9056 -3312 -15V
FLAG -10016 -3408 15V
FLAG -10016 -3184 -15V
FLAG -9056 -3696 -15V
FLAG -9056 -3936 15V
FLAG -9040 -3584 15V
FLAG -8784 -3680 out
FLAG -9504 -3440 -15V
FLAG -9504 -3376 15V
FLAG -9392 -3728 0
FLAG -9424 -4064 15V
FLAG -9552 -3792 15V
FLAG -9600 -4112 -15V
FLAG -9280 -3904 Uc3
FLAG -9344 -3344 Uc4
FLAG -9952 -3664 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 -9376 -3424 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL pnp -9120 -3376 M180
WINDOW 0 53 61 Left 2
WINDOW 3 51 38 Left 2
SYMATTR InstName Q2
SYMATTR Value BC557C
SYMBOL Misc\\EuropeanResistor -9104 -3440 R90
WINDOW 0 1 80 VBottom 2
WINDOW 3 -18 42 VTop 2
SYMATTR InstName R8
SYMATTR Value 4.7K
SYMBOL Misc\\EuropeanResistor -9040 -3488 R180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R9
SYMATTR Value 4.7K
SYMBOL voltage -10032 -3664 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 -9360 -3440 R0
SYMATTR InstName C4
SYMATTR Value 1µ
SYMBOL Misc\\EuropeanResistor -9248 -3616 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 4.7k
SYMBOL cap -9360 -3904 R0
WINDOW 0 34 14 Left 2
WINDOW 3 34 49 Left 2
SYMATTR InstName C3
SYMATTR Value 1µ
SYMBOL Misc\\EuropeanResistor -9104 -3872 R90
WINDOW 0 0 71 VBottom 2
WINDOW 3 -17 36 VTop 2
SYMATTR InstName R6
SYMATTR Value 4.7K
SYMBOL Misc\\EuropeanResistor -9040 -3680 R180
WINDOW 0 33 65 Left 2
WINDOW 3 32 43 Left 2
SYMATTR InstName R7
SYMATTR Value 4.7K
SYMBOL npn -9120 -3904 R0
WINDOW 3 56 54 Left 2
SYMATTR Value BC547C
SYMATTR InstName Q1
SYMBOL diode -8800 -3808 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL diode -8864 -3504 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL Misc\\EuropeanResistor -9296 -3904 R0
SYMATTR InstName R1
SYMATTR Value 50K
SYMBOL Misc\\EuropeanResistor -9296 -3792 R0
SYMATTR InstName R2
SYMATTR Value 50K
SYMBOL Misc\\EuropeanResistor -9296 -3456 R0
SYMATTR InstName R3
SYMATTR Value 50K
SYMBOL Misc\\EuropeanResistor -9296 -3584 R0
SYMATTR InstName R4
SYMATTR Value 50K
SYMBOL Misc\\EuropeanResistor -8896 -3808 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 500
SYMBOL Misc\\EuropeanResistor -8896 -3504 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 500
SYMBOL Opamps\\OP27 -9504 -3344 M180
SYMATTR InstName U2
SYMBOL npn -9488 -4016 R0
SYMATTR InstName Q3
SYMATTR Value BC547C
SYMBOL pnp -9664 -4064 R0
SYMATTR InstName Q4
SYMATTR Value BC557C
SYMBOL Misc\\EuropeanResistor -9568 -3936 R0
SYMATTR InstName R12
SYMATTR Value 47K
TEXT -10104 -3480 Left 2 !.tran 0 6m 2m 50µ
TEXT -8776 -3648 Left 2 ;Out