Version 4
SHEET 1 1156 724
WIRE 336 -144 240 -144
WIRE 416 -144 336 -144
WIRE 480 -144 416 -144
WIRE 240 -112 240 -144
WIRE 416 -112 416 -144
WIRE -656 -48 -688 -48
WIRE -528 -48 -576 -48
WIRE -384 -48 -528 -48
WIRE -256 -48 -384 -48
WIRE -528 -16 -528 -48
WIRE -256 -16 -256 -48
WIRE 416 16 416 -32
WIRE 464 16 416 16
WIRE 544 16 464 16
WIRE 576 16 544 16
WIRE 688 16 656 16
WIRE 736 16 688 16
WIRE 848 16 800 16
WIRE 880 16 848 16
WIRE 848 32 848 16
WIRE 416 48 416 16
WIRE 544 48 544 16
WIRE 688 48 688 16
WIRE -384 80 -384 -48
WIRE -256 96 -256 64
WIRE -48 96 -256 96
WIRE 96 96 32 96
WIRE 240 96 240 -32
WIRE 240 96 160 96
WIRE 304 96 240 96
WIRE 352 96 304 96
WIRE -896 128 -928 128
WIRE -848 128 -896 128
WIRE -768 128 -848 128
WIRE -688 128 -768 128
WIRE -624 128 -688 128
WIRE -528 128 -528 64
WIRE -528 128 -560 128
WIRE -448 128 -528 128
WIRE -256 128 -256 96
WIRE 240 144 240 96
WIRE 544 144 544 112
WIRE 688 144 688 112
WIRE 848 144 848 112
WIRE -848 160 -848 128
WIRE -928 176 -928 128
WIRE -768 176 -768 128
WIRE 416 192 416 144
WIRE 464 192 416 192
WIRE 480 192 464 192
WIRE -688 208 -688 192
WIRE -384 208 -384 176
WIRE -384 208 -688 208
WIRE -528 224 -528 128
WIRE -384 224 -384 208
WIRE 416 224 416 192
WIRE -256 272 -256 208
WIRE -48 272 -96 272
WIRE 96 272 32 272
WIRE 240 272 240 224
WIRE 240 272 160 272
WIRE 304 272 240 272
WIRE 352 272 304 272
WIRE -928 288 -928 256
WIRE -848 288 -848 240
WIRE -848 288 -928 288
WIRE -768 288 -768 240
WIRE -768 288 -848 288
WIRE -688 288 -688 272
WIRE -688 288 -768 288
WIRE -768 304 -768 288
WIRE -528 320 -528 304
WIRE -496 320 -528 320
WIRE -384 320 -384 304
WIRE -384 320 -416 320
WIRE -320 320 -384 320
WIRE -528 336 -528 320
WIRE -96 352 -96 272
WIRE 240 352 240 272
WIRE 416 352 416 320
WIRE 464 352 416 352
WIRE 480 352 464 352
WIRE -256 384 -256 368
WIRE 416 384 416 352
WIRE -96 496 -96 432
WIRE 240 496 240 432
WIRE 416 496 416 464
FLAG -528 336 0
FLAG -768 304 0
FLAG -688 -48 0
FLAG 560 -144 0
FLAG 416 496 0
FLAG -96 496 0
FLAG 240 496 0
FLAG 544 144 0
FLAG 688 144 0
FLAG 848 144 0
FLAG 880 16 NF
IOPIN 880 16 Out
FLAG 464 352 e1
FLAG 464 16 c2
FLAG 304 272 b1
FLAG 304 96 b2
FLAG 464 192 ce
FLAG 336 -144 batt
FLAG -256 384 0
FLAG -896 128 BFO
SYMBOL npn -448 80 R0
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL Misc\\EuropeanResistor -544 -32 R0
SYMATTR InstName R6
SYMATTR Value 100k
SYMBOL Misc\\EuropeanResistor -512 208 M0
SYMATTR InstName R7
SYMATTR Value 100k
SYMBOL cap -624 144 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C4
SYMATTR Value 22p
SYMBOL cap -704 208 R0
SYMATTR InstName C5
SYMATTR Value 1n
SYMBOL cap -704 128 R0
SYMATTR InstName C6
SYMATTR Value 560p
SYMBOL ind2 -864 144 R0
SYMATTR InstName L1
SYMATTR Value 270µ
SYMATTR Type ind
SYMBOL cap -784 176 R0
SYMATTR InstName C7
SYMATTR Value 73p
SYMBOL Misc\\EuropeanResistor -944 160 R0
SYMATTR InstName R8
SYMATTR Value 300k
SYMBOL cap 160 112 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C8
SYMATTR Value 1n
SYMBOL Misc\\battery -560 -48 R90
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value 6v
SYMBOL Misc\\EuropeanResistor 400 -128 R0
SYMATTR InstName R1
SYMATTR Value 5.6k
SYMBOL Misc\\battery 464 -144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 9V
SYMBOL Misc\\EuropeanResistor 400 368 R0
SYMATTR InstName R2
SYMATTR Value 47
SYMBOL cap 736 32 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C3
SYMATTR Value 470n
SYMBOL voltage -96 336 R0
WINDOW 3 -35 111 Left 2
WINDOW 123 42 70 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 42 35 Left 2
SYMATTR Value SINE(0 50m 490k)
SYMATTR Value2 AC 2
SYMATTR InstName V2
SYMBOL cap 96 288 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C10
SYMATTR Value 1n
SYMBOL Misc\\EuropeanResistor 224 128 R0
SYMATTR InstName R13
SYMATTR Value 27k
SYMBOL Misc\\EuropeanResistor 224 -128 R0
SYMATTR InstName R16
SYMATTR Value 68k
SYMBOL npn 352 48 R0
SYMATTR InstName Q3
SYMATTR Value BC547C
SYMBOL npn 352 224 R0
SYMATTR InstName Q4
SYMATTR Value BC547C
SYMBOL Misc\\EuropeanResistor 224 336 R0
SYMATTR InstName R12
SYMATTR Value 6.8k
SYMBOL cap 528 48 R0
SYMATTR InstName C1
SYMATTR Value 4.7n
SYMBOL cap 672 48 R0
SYMATTR InstName C9
SYMATTR Value 4.7n
SYMBOL Misc\\EuropeanResistor 832 16 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor -64 288 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 7k
SYMBOL Misc\\EuropeanResistor 672 32 M270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R11
SYMATTR Value 4.7k
SYMBOL Misc\\EuropeanResistor -512 304 M90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 560
SYMBOL Misc\\EuropeanResistor -64 112 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R10
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor -400 208 R0
SYMATTR InstName R14
SYMATTR Value 2.2k
SYMBOL npn -320 272 R0
SYMATTR InstName Q2
SYMATTR Value BC547C
SYMBOL Misc\\EuropeanResistor -272 112 R0
SYMATTR InstName R9
SYMATTR Value 2.2k
SYMBOL Misc\\EuropeanResistor -272 -32 R0
SYMATTR InstName R15
SYMATTR Value 1k
TEXT -160 -136 Left 2 !.tran 0 25m 2m 20n
TEXT -160 -96 Left 2 !;ac oct 1k 100 1Meg
TEXT -104 216 Left 2 ;ZF-Ausgang