Version 4
SHEET 1 2932 1076
WIRE 1216 -80 1120 -80
WIRE 1712 -80 1216 -80
WIRE 1712 -48 1712 -80
WIRE 1216 -32 1216 -80
WIRE 1984 80 1872 80
WIRE 2064 80 1984 80
WIRE 2432 80 2064 80
WIRE 1216 96 1216 48
WIRE 1248 96 1216 96
WIRE 1504 96 1328 96
WIRE 1712 96 1712 32
WIRE 1712 96 1568 96
WIRE 1808 96 1712 96
WIRE 2544 96 2512 96
WIRE 2432 112 2384 112
WIRE 1216 144 1216 96
WIRE 2064 160 2064 80
WIRE 2112 160 2064 160
WIRE 2256 160 2192 160
WIRE 2352 160 2256 160
WIRE 2384 160 2384 112
WIRE 2384 160 2352 160
WIRE 2384 240 2384 160
WIRE 1712 256 1712 96
WIRE 2256 288 2256 160
WIRE 1120 304 1120 -80
WIRE 1328 304 1328 96
WIRE 1120 464 1120 384
WIRE 1216 464 1216 224
WIRE 1216 464 1120 464
WIRE 1328 464 1328 384
WIRE 1328 464 1216 464
WIRE 1712 464 1712 336
WIRE 1712 464 1328 464
WIRE 2256 464 2256 368
WIRE 2256 464 1712 464
WIRE 2384 464 2384 304
WIRE 2384 464 2256 464
WIRE 1712 512 1712 464
FLAG 1712 512 0
FLAG 2544 96 q1
FLAG 1984 80 q0
FLAG 2352 160 x1
FLAG 1248 96 u/2
SYMBOL cap 1568 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL Misc\\EuropeanResistor 1696 240 R0
SYMATTR InstName Rin24046
SYMATTR Value 1Meg
SYMBOL Digital\\schmitt 1808 32 R0
SYMATTR SpiceLine Vlow=0 Vhigh=5 Vt=2.5 Vh=1m
SYMATTR SpiceLine2 Td=10n Trise=5n
SYMATTR InstName A1
SYMBOL Misc\\EuropeanResistor 1696 -64 R0
SYMATTR InstName Rin14046
SYMATTR Value 1Meg
SYMBOL voltage 1328 288 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value SINE(0 2.5 1200K)
SYMBOL voltage 1120 288 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL XOR_2 2480 96 R0
SYMATTR InstName U1
SYMATTR SpiceLine2 Td=10n Trise=5n
SYMBOL cap 2368 240 R0
SYMATTR InstName C2
SYMATTR Value 1n
SYMBOL Misc\\EuropeanResistor 2208 144 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 2200
SYMBOL Misc\\EuropeanResistor 1200 -48 R0
SYMATTR InstName Rin1
SYMATTR Value 1K
SYMBOL Misc\\EuropeanResistor 1200 128 R0
SYMATTR InstName Rin2
SYMATTR Value 1K
SYMBOL Misc\\EuropeanResistor 2240 272 R0
SYMATTR InstName Rin3
SYMATTR Value 1e6
TEXT 1432 632 Left 2 !.tran 0 40µ 38µ 0.1µ
TEXT 2424 152 Left 2 ;74HC86