Version 4
SHEET 1 880 680
WIRE -7472 -2512 -7472 -2528
WIRE -7472 -2512 -7552 -2512
WIRE -7344 -2512 -7472 -2512
WIRE -7472 -2496 -7472 -2512
WIRE -7680 -2480 -7728 -2480
WIRE -7584 -2480 -7616 -2480
WIRE -7232 -2464 -7232 -2496
WIRE -7552 -2448 -7552 -2512
WIRE -7536 -2448 -7552 -2448
WIRE -7440 -2400 -7472 -2400
WIRE -7824 -2352 -8000 -2352
WIRE -7728 -2352 -7728 -2480
WIRE -7728 -2352 -7744 -2352
WIRE -7680 -2352 -7728 -2352
WIRE -7584 -2336 -7584 -2480
WIRE -7584 -2336 -7616 -2336
WIRE -7568 -2336 -7584 -2336
WIRE -7440 -2336 -7440 -2400
WIRE -7440 -2336 -7488 -2336
WIRE -7232 -2336 -7232 -2384
WIRE -7232 -2336 -7264 -2336
WIRE -7680 -2320 -7696 -2320
WIRE -8000 -2304 -8000 -2352
WIRE -7264 -2304 -7264 -2336
WIRE -7648 -2272 -7648 -2304
WIRE -7696 -2256 -7696 -2320
WIRE -7232 -2256 -7232 -2336
WIRE -8000 -2208 -8000 -2224
WIRE -7728 -2176 -7728 -2352
WIRE -7712 -2176 -7728 -2176
WIRE -7440 -2176 -7440 -2336
WIRE -7440 -2176 -7616 -2176
WIRE -7232 -2096 -7232 -2176
WIRE -7664 -2080 -7664 -2112
FLAG -7648 -2368 +12V
FLAG -7648 -2272 -12V
FLAG -7696 -2256 0
FLAG -8000 -2208 0
FLAG -7472 -2608 +12V
FLAG -7264 -2304 0
FLAG -7232 -2496 +12V
FLAG -7232 -2096 -12V
FLAG -7664 -2080 0
SYMBOL Misc\\EuropeanResistor -7840 -2336 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL voltage -8000 -2320 R0
WINDOW 3 -39 166 Left 2
WINDOW 123 24 44 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(0 1 40 0 0 0 0)
SYMATTR InstName V5
SYMBOL voltage -7232 -2480 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL voltage -7232 -2272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 12V
SYMBOL Opamps\\opamp2 -7648 -2400 R0
WINDOW 3 17 118 Left 2
WINDOW 0 20 25 Left 2
SYMATTR Value TL081
SYMATTR InstName U1
SYMBOL npn2 -7712 -2112 R270
WINDOW 0 31 105 VRight 2
WINDOW 3 -5 107 VRight 2
SYMATTR InstName Q2
SYMATTR Value BC413
SYMBOL Misc\\EuropeanResistor -7584 -2320 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 10
SYMBOL diode -7616 -2496 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMATTR Value DD
SYMBOL npn2 -7536 -2496 R0
WINDOW 0 115 23 Right 2
WINDOW 3 153 62 Right 2
SYMATTR InstName Q1
SYMATTR Value BC413
SYMBOL Misc\\EuropeanResistor -7456 -2512 R180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R3
SYMATTR Value 22k
TEXT -8040 -2112 Left 2 !.tran 200ms
TEXT -8048 -1992 Left 2 !.model DD D(Is=22n N=2.1)
TEXT -8040 -2064 Left 2 !.temp 15 35
TEXT -8048 -1912 Left 2 !.include TL081.301
TEXT -8048 -1952 Left 2 !.include bc.lib