Version 4
SHEET 1 880 680
WIRE 240 -64 176 -64
WIRE 352 -64 304 -64
WIRE -64 32 -112 32
WIRE 80 32 16 32
WIRE 176 32 176 -64
WIRE 176 32 80 32
WIRE 224 32 176 32
WIRE 352 32 352 -64
WIRE 352 32 304 32
WIRE -112 80 -112 32
WIRE 80 80 80 32
WIRE 240 144 240 128
WIRE 176 160 176 32
WIRE 208 160 176 160
WIRE 352 176 352 32
WIRE 352 176 272 176
WIRE 416 176 352 176
WIRE 80 192 80 144
WIRE 208 192 80 192
WIRE -112 224 -112 160
WIRE 80 224 80 192
WIRE 240 224 240 208
WIRE -112 352 -112 336
WIRE 16 352 16 336
WIRE -112 448 -112 432
WIRE 16 448 16 432
FLAG -112 224 0
FLAG -112 448 0
FLAG 16 448 0
FLAG 80 224 0
FLAG 416 176 Vout
FLAG 240 128 +V
FLAG 240 224 -V
FLAG 16 336 +V
FLAG -112 336 -V
SYMBOL Opamps\\UniversalOpamp2 240 176 R0
WINDOW 123 -116 119 Left 2
WINDOW 39 -117 150 Left 2
WINDOW 40 -119 183 Left 2
WINDOW 38 -120 210 Left 2
SYMATTR Value2 Avol=200k GBW=1Meg Slew=0.5Meg
SYMATTR SpiceLine ilimit=25m rail=0 Vos=1m phimargin=60
SYMATTR SpiceLine2 en=30n enk=100 in=500f ink=1k Rin=2Meg
SYMATTR SpiceModel level.3a
SYMATTR InstName U1
SYMBOL voltage 16 336 R0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -112 336 R0
SYMATTR InstName V2
SYMATTR Value -15
SYMBOL voltage -112 64 R0
WINDOW 3 -28 200 Left 2
WINDOW 123 15 126 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(0 0 100)
SYMATTR Value2 AC 1
SYMATTR InstName V3
SYMBOL res 320 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName RF
SYMATTR Value 47k
SYMBOL res 32 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL cap 64 80 R0
WINDOW 3 27 56 Left 2
SYMATTR Value 100n
SYMATTR InstName C1
SYMBOL cap 304 -80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName CF
SYMATTR Value 680p
TEXT -136 -176 Left 2 !.noise V(Vout) V3 dec 100 1 10Meg
TEXT 120 232 Left 2 ;level.3a