Version 4
SHEET 1 964 680
WIRE -144 -48 -336 -48
WIRE -32 -48 -144 -48
WIRE 128 -48 48 -48
WIRE 192 -48 128 -48
WIRE 352 -48 272 -48
WIRE 464 -48 352 -48
WIRE 624 -48 544 -48
WIRE 656 -48 624 -48
WIRE 800 -48 736 -48
WIRE -336 0 -336 -48
WIRE -336 112 -336 80
WIRE 240 176 240 128
WIRE 128 192 128 -48
WIRE 208 192 128 192
WIRE 704 192 704 144
WIRE 352 208 352 -48
WIRE 352 208 272 208
WIRE 624 208 624 -48
WIRE 672 208 624 208
WIRE 208 224 128 224
WIRE 800 224 800 -48
WIRE 800 224 736 224
WIRE 864 224 800 224
WIRE 464 240 432 240
WIRE 624 240 544 240
WIRE 672 240 624 240
WIRE 240 288 240 240
WIRE 624 304 624 240
WIRE 704 304 704 256
WIRE -336 320 -336 288
WIRE -208 320 -208 288
WIRE -96 320 -96 288
WIRE 624 416 624 384
WIRE -336 448 -336 400
WIRE -208 448 -208 400
WIRE -96 448 -96 400
FLAG -336 448 0
FLAG -208 448 0
FLAG -96 448 0
FLAG -336 288 +7.5V
FLAG -208 288 -7.5V
FLAG 240 128 +7.5V
FLAG 240 288 -7.5V
FLAG -144 -48 Input
FLAG 864 224 Output
FLAG -336 112 0
FLAG 128 224 0
FLAG 704 144 +7.5V
FLAG 704 304 -7.5V
FLAG -96 288 +2.5V
FLAG 432 240 +2.5V
FLAG 624 416 0
SYMBOL Opamps\\UniversalOpamp2 240 208 R0
SYMATTR InstName U1
SYMBOL voltage -336 304 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 7.5
SYMBOL voltage -208 416 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 7.5
SYMBOL voltage -96 304 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 1.25
SYMBOL res 64 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL res 288 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 3K
SYMBOL voltage -336 -16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value SINE(0 5 1k)
SYMBOL Opamps\\UniversalOpamp2 704 224 R0
SYMATTR InstName U2
SYMBOL res 560 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 3.3k
SYMBOL res 752 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 3.3k
SYMBOL res 560 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 3.3k
SYMBOL res 640 400 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R6
SYMATTR Value 3.3k
TEXT -352 608 Left 2 !.tran 10m