Version 4
SHEET 1 880 680
WIRE 176 -48 -48 -48
WIRE 464 -48 176 -48
WIRE 608 -48 464 -48
WIRE 176 -16 176 -48
WIRE 608 16 608 -48
WIRE -48 96 -48 -48
WIRE 176 112 176 64
WIRE 400 112 176 112
WIRE 464 128 464 -48
WIRE 400 144 400 112
WIRE 432 144 400 144
WIRE 608 160 608 96
WIRE 608 160 496 160
WIRE 176 176 176 112
WIRE 272 176 176 176
WIRE 384 176 352 176
WIRE 432 176 384 176
WIRE -48 224 -48 176
WIRE 384 272 384 176
WIRE 176 288 176 176
WIRE 464 336 464 192
WIRE 384 368 384 336
WIRE 176 400 176 368
FLAG -48 224 0
FLAG 464 336 0
FLAG 384 368 0
FLAG 176 400 0
SYMBOL res 160 -32 R0
SYMATTR InstName R1
SYMATTR Value 56k
SYMBOL voltage -48 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 368 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL Comparators\\LT1716 464 160 R0
SYMATTR InstName U1
SYMBOL cap 368 272 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL current 176 288 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value PULSE(60u 25u 94u 10n 10n 5u 100u 3)
SYMBOL res 592 0 R0
SYMATTR InstName R3
SYMATTR Value 1k
TEXT -80 392 Left 2 !.tran 0 1m 0 1u