Version 4
SHEET 1 1116 680
WIRE 464 -80 464 -96
WIRE -240 -32 -240 -64
WIRE 464 0 464 -16
WIRE -240 80 -240 48
WIRE 144 80 144 48
WIRE 464 96 464 80
WIRE 464 96 256 96
WIRE 464 112 464 96
WIRE 320 176 320 160
WIRE 256 192 256 96
WIRE 288 192 256 192
WIRE 464 208 464 192
WIRE 464 208 352 208
WIRE 560 208 464 208
WIRE -160 224 -240 224
WIRE 16 224 -80 224
WIRE 64 224 16 224
WIRE 144 224 144 160
WIRE 144 224 128 224
WIRE 288 224 144 224
WIRE -240 256 -240 224
WIRE 320 272 320 240
WIRE 144 320 144 224
WIRE -240 368 -240 336
WIRE 144 416 144 400
FLAG 464 -96 0
FLAG 320 160 +UB
FLAG 16 224 Sig_in
FLAG -240 368 0
FLAG -240 80 0
FLAG -240 -64 +UB
FLAG 560 208 X1
FLAG 144 416 0
FLAG 320 272 0
FLAG 144 48 +UB
SYMBOL res 448 96 R0
SYMATTR InstName R3
SYMATTR Value 27k
SYMBOL res 448 -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 10µ
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 128 304 R0
SYMATTR InstName R1
SYMATTR Value 22k
SYMBOL Opamps\\LT1115 320 144 R0
SYMATTR InstName U1
SYMBOL res 128 64 R0
SYMATTR InstName R2
SYMATTR Value 22k
SYMBOL cap 448 -80 R0
SYMATTR InstName C2
SYMATTR Value 100µ
TEXT -272 192 Left 3 ;Quelle
TEXT -248 488 Left 2 ;.ac dec 20 1 10MEG
TEXT 248 -8 Left 2 ;V=693
TEXT 248 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 272 -160 Left 2 ;Noise 1Hz - 20kHz =
TEXT 248 -40 Left 2 ;Fgo ca. 111 kHz
TEXT 248 -72 Left 2 ;Fgu ca. 41 Hz
RECTANGLE Normal -64 416 -304 160 2