Version 4
SHEET 1 1156 980
WIRE 496 400 400 400
WIRE 144 432 144 400
WIRE 320 432 320 416
WIRE 400 432 400 400
WIRE -144 528 -144 512
WIRE -16 528 -16 512
WIRE -144 624 -144 608
WIRE -16 624 -16 608
WIRE 320 704 320 688
WIRE 400 720 400 688
WIRE 144 752 144 688
WIRE 144 848 144 832
FLAG -16 624 0
FLAG -144 624 0
FLAG -144 512 -V
FLAG -16 512 +V
FLAG 320 416 +V
FLAG 320 704 -V
FLAG 400 720 0
FLAG 144 400 0
FLAG 144 848 0
FLAG 496 400 OUT
SYMBOL voltage -144 512 R0
SYMATTR InstName V1
SYMATTR Value -5
SYMBOL voltage -16 512 R0
SYMATTR InstName V2
SYMATTR Value +5
SYMBOL opamps\\LT1991 320 560 R0
SYMATTR InstName U1
SYMBOL voltage 144 736 R0
SYMATTR InstName V4
SYMATTR Value SINE(0 .1 100)
TEXT 440 792 Left 2 !.tran .1