Version 4
SHEET 1 880 680
WIRE 96 -112 -528 -112
WIRE -48 -48 -144 -48
WIRE 320 -48 16 -48
WIRE -528 -32 -528 -112
WIRE -528 64 -528 48
WIRE 128 64 112 64
WIRE -528 80 -528 64
WIRE -256 80 -336 80
WIRE -144 80 -144 -48
WIRE -144 80 -176 80
WIRE -112 80 -144 80
WIRE 32 80 -32 80
WIRE 80 80 32 80
WIRE 208 96 208 32
WIRE 208 96 144 96
WIRE 560 96 208 96
WIRE 80 112 64 112
WIRE 32 128 32 80
WIRE 32 128 -64 128
WIRE 96 128 96 -112
WIRE 112 128 96 128
WIRE 208 128 208 96
WIRE 32 176 32 128
WIRE 64 224 64 112
WIRE 208 224 208 208
WIRE 208 224 64 224
WIRE 320 224 320 -48
WIRE 320 224 208 224
WIRE 208 240 208 224
WIRE -528 384 -528 160
WIRE 128 384 128 64
WIRE 128 384 -528 384
WIRE -64 480 -64 128
WIRE 32 480 -64 480
WIRE 96 528 96 480
WIRE 560 528 560 96
WIRE 560 528 96 528
WIRE -144 576 -144 80
WIRE 32 576 -144 576
WIRE 96 576 96 528
FLAG 32 240 0
FLAG 208 320 0
FLAG -336 160 0
FLAG -528 64 0
FLAG 208 32 out
FLAG -144 80 stg1
FLAG 32 80 stg2
SYMBOL Opamps\\AD8542 112 160 M180
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 -160 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 220k
SYMBOL res -16 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 220k
SYMBOL cap 16 -64 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL cap 48 240 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C2
SYMATTR Value 470p
SYMBOL res 192 112 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 192 224 R0
SYMATTR InstName R4
SYMATTR Value 100
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
TEXT -562 390 Left 2 !.ac dec 250 0.1 10meg