Version 4
SHEET 1 880 680
WIRE 256 112 208 112
WIRE 144 128 -16 128
FLAG 144 160 0
FLAG -16 208 0
FLAG 256 192 0
SYMBOL Digital\\schmitt 144 64 R0
SYMATTR InstName A1
SYMBOL voltage -16 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(.5 .5 1k)
SYMBOL res 240 96 R0
SYMATTR InstName R1
SYMATTR Value 1k
TEXT 192 256 Left 2 !.tran 0 2m 0 1u