Version 4
SHEET 1 1012 680
WIRE 464 0 64 0
WIRE 416 32 240 32
WIRE 64 64 64 0
WIRE 64 64 -48 64
WIRE 128 64 64 64
WIRE 576 64 384 64
WIRE 240 80 240 32
WIRE 240 80 192 80
WIRE 272 80 240 80
WIRE 368 80 336 80
WIRE 416 80 416 32
WIRE 528 80 416 80
WIRE 112 96 64 96
WIRE 128 96 112 96
WIRE 64 112 64 96
WIRE 464 112 464 0
WIRE 576 112 576 64
WIRE -48 128 -48 64
WIRE 368 128 368 80
WIRE 416 128 368 128
WIRE 528 128 528 80
WIRE 112 160 112 96
WIRE 384 160 384 64
WIRE 384 160 112 160
WIRE 464 208 464 192
WIRE 576 208 576 192
WIRE 576 208 464 208
FLAG -48 208 0
FLAG 64 192 0
FLAG -336 192 0
FLAG -336 112 v+
FLAG 160 48 v+
FLAG 160 112 0
FLAG 272 96 0
FLAG 416 176 0
FLAG 528 176 0
FLAG 528 288 0
SYMBOL voltage -48 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(2.5 2.5 1k)
SYMBOL voltage 64 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value SINE(1 1 1.2k)
SYMBOL Comparators\\LT1018 160 80 R0
SYMATTR InstName U1
SYMBOL voltage -336 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL Digital\\inv 272 16 R0
SYMATTR InstName A1
SYMATTR SpiceLine vhigh=5
SYMATTR SpiceLine2 trise=1n tfall=1n
SYMBOL sw 464 208 M180
SYMATTR InstName S1
SYMBOL sw 576 208 M180
SYMATTR InstName S2
TEXT -82 236 Left 0 !.tran 10m uic
TEXT 416 40 Left 0 !.model SW SW(Ron=.07 Roff=1Meg Vt=2.5)