Version 4
SHEET 1 4056 888
WIRE 2352 -272 2032 -272
WIRE 2880 -272 2352 -272
WIRE 2944 -272 2880 -272
WIRE 3040 -272 3024 -272
WIRE 2192 -224 2160 -224
WIRE 2288 -224 2256 -224
WIRE 2720 -224 2688 -224
WIRE 2816 -224 2784 -224
WIRE 2288 -208 2288 -224
WIRE 2816 -208 2816 -224
WIRE 2032 -160 2032 -272
WIRE 2160 -112 2160 -224
WIRE 2192 -112 2160 -112
WIRE 2288 -112 2288 -128
WIRE 2288 -112 2256 -112
WIRE 2416 -112 2288 -112
WIRE 2688 -112 2688 -224
WIRE 2720 -112 2688 -112
WIRE 2816 -112 2816 -128
WIRE 2816 -112 2784 -112
WIRE 2944 -112 2816 -112
WIRE 2880 -64 2880 -272
WIRE 2352 -48 2352 -272
WIRE 2816 -48 2816 -112
WIRE 2848 -48 2816 -48
WIRE 2288 -32 2288 -112
WIRE 2320 -32 2288 -32
WIRE 2944 -32 2944 -112
WIRE 2944 -32 2912 -32
WIRE 2976 -32 2944 -32
WIRE 3088 -32 3056 -32
WIRE 3152 -32 3088 -32
WIRE 3264 -32 3216 -32
WIRE 3280 -32 3264 -32
WIRE 2416 -16 2416 -112
WIRE 2416 -16 2384 -16
WIRE 2448 -16 2416 -16
WIRE 2560 -16 2528 -16
WIRE 2592 -16 2560 -16
WIRE 2688 -16 2688 -112
WIRE 2688 -16 2672 -16
WIRE 2704 -16 2688 -16
WIRE 2816 -16 2784 -16
WIRE 2848 -16 2816 -16
WIRE 1712 0 1680 0
WIRE 1744 0 1712 0
WIRE 1872 0 1824 0
WIRE 1920 0 1872 0
WIRE 2032 0 2032 -80
WIRE 2032 0 1984 0
WIRE 2064 0 2032 0
WIRE 2160 0 2160 -112
WIRE 2160 0 2144 0
WIRE 2176 0 2160 0
WIRE 2288 0 2256 0
WIRE 2320 0 2288 0
WIRE 3088 64 3088 -32
WIRE 3280 64 3280 -32
WIRE 1680 80 1680 0
WIRE 2032 80 2032 0
WIRE 1872 96 1872 0
WIRE 2288 96 2288 0
WIRE 2560 96 2560 -16
WIRE 2816 96 2816 -16
WIRE 1680 256 1680 160
WIRE 1872 256 1872 160
WIRE 1872 256 1680 256
WIRE 2032 256 2032 160
WIRE 2032 256 1872 256
WIRE 2288 256 2288 160
WIRE 2288 256 2032 256
WIRE 2352 256 2352 16
WIRE 2352 256 2288 256
WIRE 2560 256 2560 160
WIRE 2560 256 2352 256
WIRE 2816 256 2816 160
WIRE 2816 256 2560 256
WIRE 2880 256 2880 0
WIRE 2880 256 2816 256
WIRE 3088 256 3088 128
WIRE 3088 256 2880 256
WIRE 3280 256 3280 144
WIRE 3280 256 3088 256
WIRE 1680 272 1680 256
FLAG 1680 272 0
FLAG 1712 0 src
FLAG 3040 -272 0
FLAG 3264 -32 out
SYMBOL voltage 1680 64 R0
WINDOW 0 -65 73 Left 2
WINDOW 3 -64 105 Left 2
WINDOW 39 -94 141 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 10m 650)
SYMATTR Value2 AC 1
SYMBOL voltage 2928 -272 R270
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 8V
SYMBOL res 2160 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 12k
SYMBOL res 2272 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 3.3k
SYMBOL cap 2256 -128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 22n
SYMBOL cap 2304 160 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C3
SYMATTR Value 4.7n
SYMBOL res 2688 -32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 12k
SYMBOL res 2800 -32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 3.3k
SYMBOL cap 2784 -128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 22n
SYMBOL cap 2832 160 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C6
SYMATTR Value 4.7n
SYMBOL cap 1920 16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 220n
SYMBOL cap 3216 -48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C8
SYMATTR Value 47n
SYMBOL res 2016 64 R0
SYMATTR InstName R2
SYMATTR Value 47k
SYMBOL res 2016 -176 R0
SYMATTR InstName R1
SYMATTR Value 47k
SYMBOL res 3296 48 M0
SYMATTR InstName R41
SYMATTR Value 20k
SYMBOL cap 2544 96 R0
SYMATTR InstName C4
SYMATTR Value 100n
SYMBOL res 2544 -32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 470
SYMBOL cap 3072 64 R0
SYMATTR InstName C7
SYMATTR Value 100n
SYMBOL res 3072 -48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 820
SYMBOL res 1840 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 1.5k
SYMBOL cap 1856 96 R0
SYMATTR InstName C9
SYMATTR Value 10n
SYMBOL Opamps\\LT1007 2352 -80 R0
SYMATTR InstName U1
SYMBOL Opamps\\LT1007 2880 -96 R0
SYMATTR InstName U2
SYMBOL cap 2784 -240 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C10
SYMATTR Value 220n
SYMBOL cap 2256 -240 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C11
SYMATTR Value 220n
SYMBOL res 2800 -224 R0
SYMATTR InstName R10
SYMATTR Value {r_var}
SYMBOL res 2272 -224 R0
SYMATTR InstName R11
SYMATTR Value {r_var}
TEXT 1584 -240 Left 2 !;tran 0 20m 0 10u
TEXT 1584 -208 Left 2 !.ac dec 100 30 10k
TEXT 1584 -160 Left 2 !;noise v(out) V1 oct 100 10 10k
TEXT 1584 -96 Left 2 ;Verstärkung 14 dB, Rauschen 2.1µV\nbezogen auf den Eingang
TEXT 2912 -184 Left 2 !.step param r_var list 1 500 2k 20k