Version 4
SHEET 1 880 680
WIRE 112 -112 -528 -112
WIRE -528 -32 -528 -112
WIRE 160 -32 0 -32
WIRE 272 -32 240 -32
WIRE -528 64 -528 48
WIRE 112 64 112 -112
WIRE -528 80 -528 64
WIRE -112 80 -336 80
WIRE 0 80 0 -32
WIRE 0 80 -32 80
WIRE 32 80 0 80
WIRE 80 80 32 80
WIRE 272 96 272 -32
WIRE 272 96 144 96
WIRE 368 96 272 96
WIRE 0 112 0 80
WIRE 80 112 32 112
WIRE 0 208 0 176
WIRE 32 208 32 112
WIRE 32 208 0 208
WIRE 32 240 32 208
WIRE -528 384 -528 160
WIRE 112 384 112 128
WIRE 112 384 -528 384
FLAG 32 240 0
FLAG -336 160 0
FLAG -528 64 0
FLAG 272 96 out
FLAG 32 80 stg2
SYMBOL Opamps\\AD8542 112 32 R0
SYMATTR InstName U1
SYMBOL Misc\\signal -336 64 R0
WINDOW 123 24 132 Left 2
WINDOW 39 24 132 Left 2
SYMATTR InstName V1
SYMATTR Value ""
SYMATTR Value2 AC 1.
SYMBOL res -16 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL voltage -528 -48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 2.5
SYMBOL voltage -528 64 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 2.5
SYMBOL res 256 -48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL cap -16 112 R0
SYMATTR InstName C2
SYMATTR Value 220n
TEXT -386 318 Left 2 !.ac dec 250 0.1 10meg