Version 4
SHEET 1 880 680
WIRE 96 0 -48 0
WIRE 128 0 96 0
WIRE 240 0 208 0
WIRE 288 0 240 0
WIRE 400 0 368 0
WIRE 496 0 496 -64
WIRE 640 0 640 -64
WIRE 496 112 496 80
WIRE 640 112 640 80
WIRE 304 160 304 128
WIRE 240 176 240 0
WIRE 272 176 240 176
WIRE 400 192 400 0
WIRE 400 192 336 192
WIRE 432 192 400 192
WIRE -48 208 -48 0
WIRE 96 208 96 0
WIRE 272 208 96 208
WIRE 304 272 304 224
WIRE -48 320 -48 288
FLAG -48 320 0
FLAG 432 192 out
FLAG 304 128 +UB
FLAG 304 272 -UB
FLAG 496 112 0
FLAG 640 112 0
FLAG 640 -64 -UB
FLAG 496 -64 +UB
SYMBOL voltage -48 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 1 50)
SYMBOL res 224 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 384 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL voltage 496 -16 R0
WINDOW 3 23 -14 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 10
SYMBOL voltage 640 96 R180
WINDOW 0 23 95 Left 2
WINDOW 3 27 126 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 10
SYMBOL Opamps\\UniversalOpamp2 304 192 R0
SYMATTR InstName U1
TEXT -82 344 Left 2 !.tran 50m