Version 4
SHEET 1 880 800
WIRE 32 64 32 48
WIRE 352 96 160 96
WIRE 576 96 416 96
WIRE 32 160 32 144
WIRE 160 160 160 96
WIRE 160 160 32 160
WIRE 32 176 32 160
WIRE 256 192 224 192
WIRE 704 192 512 192
WIRE 160 256 160 160
WIRE 256 256 160 256
WIRE 576 256 576 96
WIRE 576 256 512 256
WIRE 32 272 32 256
WIRE 64 320 48 320
WIRE 176 320 128 320
WIRE 256 320 176 320
WIRE 544 320 512 320
WIRE -32 352 -32 336
WIRE 256 384 224 384
WIRE 544 384 512 384
WIRE -32 448 -32 432
WIRE 176 496 176 320
WIRE 336 496 176 496
WIRE 576 496 576 256
WIRE 576 496 416 496
FLAG -32 448 0
FLAG -32 336 +V
FLAG 224 192 +V
FLAG 48 320 0
FLAG 544 320 0
FLAG 224 384 0
FLAG 544 384 0
FLAG 32 272 0
FLAG 32 48 +V
FLAG 704 192 OUT
SYMBOL voltage -32 336 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL Comparators\\LT1671 384 288 R0
SYMATTR InstName U1
SYMBOL misc\\xtal 416 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 Invisible 2
SYMATTR InstName Y1
SYMATTR Value .5p
SYMATTR SpiceLine Rser=500 Lser=50m Cpar=5p
SYMBOL cap 128 304 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value .068µ
SYMBOL res 432 480 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 2K
SYMBOL res 16 48 R0
SYMATTR InstName R2
SYMATTR Value 2K
SYMBOL res 16 160 R0
SYMATTR InstName R3
SYMATTR Value 2K
TEXT 640 416 Left 2 !.tran .5m startup
TEXT 400 48 Bottom 2 ;1MHz Crystal Oscillator