Version 4
SHEET 1 1464 704
WIRE 1024 -32 -16 -32
WIRE -16 48 -16 -32
WIRE 32 48 -16 48
WIRE 144 48 112 48
WIRE 192 48 144 48
WIRE 224 48 192 48
WIRE 384 48 224 48
WIRE 224 64 224 48
WIRE 880 64 672 64
WIRE 1024 64 1024 -32
WIRE 1024 64 944 64
WIRE 608 80 528 80
WIRE 880 96 752 96
WIRE 144 112 144 48
WIRE 752 128 752 96
WIRE 224 144 224 128
WIRE 752 224 752 208
WIRE 144 256 144 176
WIRE 224 256 224 224
WIRE 1056 336 144 336
WIRE 144 416 144 336
WIRE 192 416 144 416
WIRE 224 416 192 416
WIRE 384 416 224 416
WIRE 224 432 224 416
WIRE 720 432 672 432
WIRE 848 432 752 432
WIRE 608 448 528 448
WIRE 1056 448 1056 336
WIRE 1056 448 976 448
WIRE 720 464 720 432
WIRE 848 464 720 464
WIRE 144 480 144 416
WIRE 752 496 752 432
WIRE 224 512 224 496
WIRE 752 592 752 576
WIRE 144 608 144 544
WIRE 224 608 224 592
WIRE 224 608 144 608
WIRE 224 624 224 608
FLAG 224 256 0
FLAG 752 224 0
FLAG 224 624 0
FLAG 752 592 0
FLAG 144 256 0
FLAG 192 48 1
FLAG 192 416 2
SYMBOL cap 208 64 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL res 208 128 R0
SYMATTR InstName R1
SYMATTR Value 438
SYMBOL RES 128 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 40k
SYMBOL SPECIALFUNCTIONS\\MODULATE 384 48 R0
WINDOW 0 55 -48 Right 2
WINDOW 3 178 125 Right 2
SYMATTR InstName A1
SYMATTR Value mark=18.6k space=0
SYMBOL Digital\\schmitt 608 16 R0
WINDOW 3 8 32 Invisible 2
SYMATTR Value Vhigh=5 Vt=0 Vh=0.01 Td=0.01n
SYMATTR InstName A2
SYMBOL DIGITAL\\XOR 928 16 R0
WINDOW 0 -33 16 Left 2
WINDOW 3 -99 -15 Invisible 2
SYMATTR InstName A3
SYMATTR Value Ref=0.01
SYMATTR Value2 Vhigh=5
SYMBOL voltage 752 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0 100n 100n 7.93u 15.87u)
SYMBOL cap 208 432 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL res 208 496 R0
SYMATTR InstName R3
SYMATTR Value 438
SYMBOL SPECIALFUNCTIONS\\MODULATE 384 416 R0
WINDOW 0 55 -48 Right 2
WINDOW 3 185 123 Right 2
SYMATTR InstName A5
SYMATTR Value mark=18.6k space=0
SYMBOL Digital\\schmitt 608 384 R0
WINDOW 3 8 32 Invisible 2
SYMATTR Value Vhigh=5 Vt=0 Vh=0.01 Td=0.01n
SYMATTR InstName A6
SYMBOL voltage 752 480 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -341 151 Left 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 5 0 100n 100n 7.93u 15.87u)
SYMBOL DIGITAL\\PHIDET 880 448 R0
WINDOW 3 -16 72 Left 2
WINDOW 39 -28 140 Left 2
WINDOW 40 -16 176 Left 2
WINDOW 123 -16 104 Left 2
SYMATTR Value Iout=0.5m
SYMATTR SpiceLine Vhigh=5
SYMATTR SpiceLine2 Ref=2.5
SYMATTR Value2 Vlow=0
SYMATTR InstName A7
SYMBOL cap 128 480 R0
SYMATTR InstName C3
SYMATTR Value 10n
SYMBOL cap 128 112 R0
SYMATTR InstName C4
SYMATTR Value 10n
TEXT 16 -104 Left 2 !.tran 40m
TEXT 176 -104 Left 2 !.ic v(1)=4