Version 4
SHEET 1 1116 680
WIRE 576 -80 576 -96
WIRE 128 -64 128 -96
WIRE -240 -32 -240 -64
WIRE 576 0 576 -16
WIRE 128 32 128 16
WIRE 128 32 32 32
WIRE 240 32 128 32
WIRE 128 48 128 32
WIRE 32 64 32 32
WIRE 240 64 240 32
WIRE -240 80 -240 48
WIRE 576 96 576 80
WIRE 576 96 368 96
WIRE 576 112 576 96
WIRE 32 144 32 128
WIRE 128 144 128 128
WIRE 432 176 432 160
WIRE 368 192 368 96
WIRE 400 192 368 192
WIRE 576 208 576 192
WIRE 576 208 464 208
WIRE 672 208 576 208
WIRE -160 224 -240 224
WIRE 16 224 -80 224
WIRE 64 224 16 224
WIRE 240 224 240 144
WIRE 240 224 128 224
WIRE 400 224 240 224
WIRE -240 256 -240 224
WIRE 432 272 432 240
WIRE -240 368 -240 336
FLAG 576 -96 0
FLAG 432 160 +UB
FLAG 16 224 Sig_in
FLAG -240 368 0
FLAG -240 80 0
FLAG -240 -64 +UB
FLAG 672 208 X1
FLAG 128 144 0
FLAG 432 272 0
FLAG 128 -96 +UB
FLAG 32 144 0
SYMBOL res 560 96 R0
SYMATTR InstName R3
SYMATTR Value 27k
SYMBOL res 560 -16 R0
SYMATTR InstName R4
SYMATTR Value 39
SYMBOL cap 128 208 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10u
SYMBOL voltage -240 240 R0
WINDOW 3 46 56 Left 2
WINDOW 123 42 84 Left 2
WINDOW 39 24 124 Left 2
SYMATTR Value SINE(0 1m 1k)
SYMATTR Value2 AC 1m
SYMATTR InstName V1
SYMBOL res -64 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Ri
SYMATTR Value 470
SYMBOL voltage -240 -48 R0
WINDOW 3 48 55 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 24 124 Left 2
SYMATTR Value +12V
SYMATTR InstName V2
SYMBOL res 112 32 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL Opamps\\LT1115 432 144 R0
SYMATTR InstName U1
SYMBOL res 112 -80 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap 560 -80 R0
SYMATTR InstName C2
SYMATTR Value 100u
SYMBOL res 224 48 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL cap 16 64 R0
SYMATTR InstName C3
SYMATTR Value 220u
TEXT -272 192 Left 3 ;Quelle
TEXT -248 488 Left 2 ;.ac dec 20 1 10MEG
TEXT 360 -8 Left 2 ;V=693
TEXT 360 24 Left 2 ;V=56,8 dB
TEXT -248 520 Left 2 !.noise V[X1] V1 dec 20 1 20k
TEXT -248 560 Left 2 ;.tran 100m
TEXT 384 -160 Left 2 ;Noise 1Hz - 20kHz =
TEXT 360 -40 Left 2 ;Fgo ca. 111 kHz
TEXT 360 -72 Left 2 ;Fgu ca. 41 Hz
RECTANGLE Normal -64 416 -304 160 2
RECTANGLE Normal 320 176 -16 -176 2