Version 4
SHEET 1 880 680
WIRE 272 -112 176 -112
WIRE 512 -112 272 -112
WIRE 720 -112 512 -112
WIRE 176 -80 176 -112
WIRE 272 -80 272 -112
WIRE 512 -16 512 -112
WIRE 720 -16 720 -112
WIRE 176 32 176 0
WIRE 448 32 176 32
WIRE 176 128 176 32
WIRE 272 128 272 0
WIRE 112 176 80 176
WIRE 368 176 336 176
WIRE 400 176 368 176
WIRE 512 176 512 80
WIRE 512 176 480 176
WIRE 720 176 720 64
WIRE 784 176 720 176
WIRE 80 208 80 176
WIRE 368 208 368 176
WIRE 784 208 784 176
WIRE 224 224 176 224
WIRE 272 224 224 224
WIRE 80 320 80 288
WIRE 720 320 720 176
WIRE 80 416 80 400
WIRE 368 416 368 288
WIRE 368 416 80 416
WIRE 80 432 80 416
WIRE 224 464 224 224
WIRE 512 464 512 176
WIRE 80 544 80 512
WIRE 224 576 224 544
WIRE 512 576 512 544
WIRE 512 576 224 576
WIRE 720 576 720 400
WIRE 720 576 512 576
FLAG 80 544 0
FLAG 784 208 0
FLAG 512 176 OUT
FLAG 80 176 IN_+
FLAG 368 176 IN_--
SYMBOL voltage 80 304 R0
WINDOW 3 -211 53 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 0.1 20)
SYMBOL res 96 304 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R1
SYMATTR Value 9k1
SYMBOL npn 112 128 R0
WINDOW 3 66 65 Left 2
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL npn 336 128 M0
WINDOW 3 73 66 Left 2
SYMATTR InstName Q2
SYMATTR Value 2N2222
SYMBOL res 160 -96 R0
SYMATTR InstName R2
SYMATTR Value 4k7
SYMBOL res 256 -96 R0
SYMATTR InstName R3
SYMATTR Value 4k7
SYMBOL res 208 448 R0
SYMATTR InstName R4
SYMATTR Value 22k
SYMBOL res 352 192 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 384 192 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 100k
SYMBOL pnp 448 80 M180
SYMATTR InstName Q3
SYMATTR Value 2N2907
SYMBOL res 496 448 R0
SYMATTR InstName R7
SYMATTR Value 1k
SYMBOL voltage 720 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 10
SYMBOL voltage 720 304 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 10
SYMBOL voltage 80 416 R0
WINDOW 3 -208 56 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value SINE(0 .1 500)
TEXT -132 570 Left 2 !.tran 0.1
TEXT 48 112 Left 2 ;Diff-Verst.
TEXT 528 -16 Left 2 ;Ausgangsstufe
TEXT 328 120 Left 2 ;Gegenkopplung
TEXT -128 320 Left 2 ;Nutzsignal
TEXT -136 440 Left 2 ;Gleichtaktsignal