Version 4
SHEET 1 1588 680
WIRE 352 64 256 64
WIRE 1040 80 1008 80
WIRE 1456 80 1328 80
WIRE 256 96 256 64
WIRE 1328 112 1328 80
WIRE 1280 128 1216 128
WIRE 1040 144 976 144
WIRE 256 208 256 176
WIRE 1280 208 1280 176
WIRE 1328 208 1328 192
WIRE 944 304 832 304
WIRE 720 320 592 320
WIRE 768 320 720 320
WIRE 256 336 256 288
WIRE 976 336 976 144
WIRE 976 336 832 336
WIRE 592 352 592 320
WIRE 1040 432 1008 432
WIRE 1456 432 1328 432
WIRE 256 464 256 416
WIRE 592 464 592 432
WIRE 1328 464 1328 432
WIRE 1280 480 1216 480
WIRE 944 496 944 304
WIRE 1040 496 944 496
WIRE 1280 560 1280 528
WIRE 1328 560 1328 544
FLAG 256 464 0
FLAG 352 64 s
IOPIN 352 64 Out
FLAG 592 464 0
FLAG 720 320 ds
FLAG 1008 80 s
IOPIN 1008 80 In
FLAG 1456 80 smax
IOPIN 1456 80 Out
FLAG 1008 432 s
IOPIN 1008 432 In
FLAG 1456 432 smin
IOPIN 1456 432 Out
FLAG 1280 208 0
FLAG 1328 208 0
FLAG 1280 560 0
FLAG 1328 560 0
SYMBOL voltage 256 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 0.2 2k)
SYMBOL voltage 256 192 R0
SYMATTR InstName V2
SYMATTR Value SINE(0 1.0 1k)
SYMBOL voltage 256 320 R0
SYMATTR InstName V3
SYMATTR Value SINE(0 0.2 0.1k)
SYMBOL bv 592 336 R0
SYMATTR InstName B1
SYMATTR Value V=ddt(V(s))/10k
SYMBOL SpecialFunctions\\sample 1120 112 R0
WINDOW 39 -28 117 Left 2
SYMATTR InstName A1
SYMATTR SpiceLine Vt=0.5
SYMBOL Digital\\schmitt 768 256 R0
WINDOW 39 -2 128 Left 2
SYMATTR InstName A2
SYMATTR SpiceLine Vt=0 Vh=10m
SYMBOL SpecialFunctions\\sample 1120 464 R0
WINDOW 39 -28 117 Left 2
SYMATTR InstName A3
SYMATTR SpiceLine Vt=0.5
SYMBOL e 1328 96 R0
SYMATTR InstName E1
SYMATTR Value 1
SYMBOL e 1328 448 R0
SYMATTR InstName E2
SYMATTR Value 1
TEXT 248 -32 Left 2 !.tran 0 10m 0 1u
TEXT 248 0 Left 2 !.options plotwinsize=0