Version 4
SHEET 1 880 680
WIRE -272 -176 -272 -192
WIRE -192 -176 -272 -176
WIRE 48 48 -160 48
WIRE 224 64 112 64
WIRE 368 64 224 64
WIRE 48 80 16 80
WIRE 16 160 16 80
WIRE 224 160 224 144
WIRE 224 160 16 160
WIRE 368 160 368 64
WIRE 384 160 368 160
WIRE 480 160 464 160
WIRE 608 160 480 160
WIRE 704 160 688 160
WIRE 704 176 704 160
WIRE -160 208 -160 48
WIRE 480 240 480 160
WIRE 496 240 480 240
WIRE 704 256 560 256
WIRE 784 256 704 256
WIRE 224 272 224 240
WIRE 496 272 480 272
WIRE 224 352 16 352
WIRE 384 352 368 352
WIRE 480 352 480 272
WIRE 480 352 464 352
WIRE 608 352 480 352
WIRE 704 352 704 256
WIRE 704 352 688 352
WIRE 224 368 224 352
WIRE 16 432 16 352
WIRE 48 432 16 432
WIRE 224 448 112 448
WIRE 368 448 368 352
WIRE 368 448 224 448
WIRE -160 464 -160 288
WIRE 48 464 -160 464
FLAG 704 176 0
FLAG -192 -176 0
FLAG -272 -272 +4.5
FLAG 80 96 +4.5
FLAG 80 416 +4.5
FLAG 528 288 +4.5
FLAG -272 -96 -4.5
FLAG 80 32 -4.5
FLAG 80 480 -4.5
FLAG 528 224 -4.5
SYMBOL Opamps\\UniversalOpamp2 80 64 M180
SYMATTR InstName U1
SYMBOL Opamps\\UniversalOpamp2 80 448 R0
SYMATTR InstName U2
SYMBOL Opamps\\UniversalOpamp2 528 256 M180
SYMATTR InstName U3
SYMBOL res 208 48 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res 208 144 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res 208 256 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 208 352 R0
SYMATTR InstName R4
SYMATTR Value 1Meg
SYMBOL res 480 144 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 480 336 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 704 144 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL res 704 336 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL voltage -272 -288 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 4.5
SYMBOL voltage -272 -192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 4.5
SYMBOL voltage -160 192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value SINE(0 12m 3)
TEXT -306 574 Left 0 !.tran 0 60 1 0.1