Version 4
SHEET 1 880 680
WIRE 288 -256 240 -256
WIRE 288 -192 288 -256
WIRE 288 -80 288 -112
WIRE 352 -16 288 -16
WIRE 464 -16 416 -16
WIRE -48 80 -112 80
WIRE 64 80 32 80
WIRE 176 80 64 80
WIRE 288 80 288 -16
WIRE 288 80 176 80
WIRE 336 80 288 80
WIRE 464 80 464 -16
WIRE 464 80 416 80
WIRE 64 112 64 80
WIRE 240 144 240 -256
WIRE 176 160 176 80
WIRE 208 160 176 160
WIRE 464 176 464 80
WIRE 464 176 272 176
WIRE 64 192 64 176
WIRE 208 192 64 192
WIRE -112 272 -112 80
WIRE 64 272 64 192
WIRE 240 272 240 208
WIRE -112 384 -112 352
WIRE 240 384 240 352
FLAG -112 384 0
FLAG 240 384 0
FLAG 288 -80 0
FLAG 64 272 0
FLAG 464 176 Vout
SYMBOL Opamps\\UniversalOpamp2 240 176 R0
SYMATTR InstName U1
SYMATTR Value2 Avol=200k GBW=1Meg Slew=0.5Meg
SYMATTR SpiceLine ilimit=25m rail=0 Vos=1m phimargin=45
SYMATTR SpiceLine2 en=30n enk=0 in=500f ink=0 Rin=2Meg
SYMBOL voltage 288 -208 R0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage 240 256 R0
SYMATTR InstName V2
SYMATTR Value -15
SYMBOL voltage -112 256 R0
WINDOW 3 24 152 Left 2
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(0 0 100)
SYMATTR Value2 AC 1
SYMATTR InstName V3
SYMBOL res 432 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName RF
SYMATTR Value 47k
SYMBOL res 48 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL cap 48 112 R0
WINDOW 3 27 56 Left 2
SYMATTR Value 100n
SYMATTR InstName C1
SYMBOL cap 416 -32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName CF
SYMATTR Value 680p
TEXT 328 424 Left 2 !.noise V(Vout) V3 dec 20 1 1g