Version 4
SHEET 1 880 680
WIRE 160 16 80 16
WIRE 336 16 240 16
WIRE 448 64 208 64
WIRE 448 80 448 64
WIRE 208 144 208 64
WIRE 80 160 80 16
WIRE 176 160 80 160
WIRE 336 176 336 16
WIRE 336 176 240 176
WIRE 448 176 448 160
WIRE 544 176 448 176
WIRE 176 192 -192 192
WIRE 448 192 448 176
WIRE 80 224 80 160
WIRE -192 240 -192 192
WIRE 336 240 336 176
WIRE 208 288 208 208
WIRE 448 288 448 272
WIRE 448 288 208 288
WIRE -192 352 -192 320
WIRE 80 352 80 304
WIRE 336 352 336 320
WIRE 544 352 544 176
FLAG 544 352 0
FLAG 336 352 0
FLAG 80 352 0
FLAG -192 352 0
SYMBOL Opamps\\AD811 208 112 R0
SYMATTR InstName U1
SYMBOL voltage 448 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 9
SYMBOL res 320 224 R0
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL res 256 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 26.1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 64 208 R0
SYMATTR InstName R3
SYMATTR Value 2.1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage -192 224 R0
WINDOW 3 22 114 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 0.5 50)
SYMBOL voltage 448 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 9
TEXT -170 312 Left 2 !.tran 100m