Version 4
SHEET 1 896 680
WIRE 0 96 -112 96
WIRE 128 96 80 96
WIRE 144 96 128 96
WIRE 256 96 224 96
WIRE -112 112 -112 96
WIRE -368 128 -368 112
WIRE -240 128 -240 112
WIRE -112 208 -112 192
WIRE 192 208 192 192
WIRE 128 224 128 96
WIRE 160 224 128 224
WIRE -368 240 -368 208
WIRE -240 240 -240 208
WIRE 256 240 256 96
WIRE 256 240 224 240
WIRE 160 256 128 256
WIRE 192 288 192 272
FLAG -240 240 0
FLAG 192 192 +V
FLAG -240 112 +V
FLAG 192 288 -V
FLAG -368 240 0
FLAG -368 112 -V
FLAG -112 208 0
FLAG 128 256 0
SYMBOL voltage -240 112 R0
SYMATTR InstName V1
SYMATTR Value 1.5
SYMBOL voltage -368 112 R0
SYMATTR InstName V2
SYMATTR Value -1.5
SYMBOL res 240 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL res 96 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1Meg
SYMBOL voltage -112 96 R0
SYMATTR InstName V3
SYMATTR Value SINE(0 13.5 1K)
SYMBOL opamps\\LT1880 192 240 R0
SYMATTR InstName U1
TEXT -72 304 Left 2 !.tran 3m