=== 8 === 8 8-1 8-2 8-3 8-4 8-58-68-78-8

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8-1 astablemultivibrator

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8-1

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8-1

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8-1

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8-1 GNDtrigger 3 7 offoutputVOH VCC 1.7V VOL 0.25Vreset

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8-1 control voltage threshold 0discharge C VCC 4.516V

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8-1 NE555

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8-1

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8-1 8-1

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8-1 U1 R1 X1 C1C2 R2

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8-2 serial in-serial out, SISOserial in-parallel out, SIPOparallel in-serial out, PISOparallel in-parallel out, PIPO

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8-2

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8-2 J-K

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8-2 8-10 QAQBQCQD = 0000 Din = 1QA QB QC QD 8-10 QA QB QC QD 0 Din= 1 2 2 1 QAQBQCQD = 1100

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8-2

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8-2

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8-3 countersynchronous counterasynchronous counterup counterdown counterup/down counter

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8-3 binary counterdecade counter

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8-3 ()

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8-3 2 4 n 2nmodulus

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8-3 N n 2n 1 < N 2n MOD-2n N 1 Q NAND

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8-3 -10 BCD

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8-3

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8-3 10 QD QB 1 NAND 0 QD QB 0 NAND 1 -10 0000 1001 10 11 1010 0000

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8-3 1. - 3

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8-3 8-2 CLK fin QC QD

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8-3 2.- 3 9kHzQB

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8-3

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8-3

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8-4 I /OI O

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8-4 1. 2. I

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8-5 n

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8-5

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8-5 Qn+1Qn 34 Qn+1

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8-5

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8-5 JA = KA = BJB = KB =1

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8-5 (3) 01

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8-5 QAQB = 00X 1001

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8-5

QAQB 10 11 01 00

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8-5 QAQB 11 X 0 2

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8-5 QAQB = 11 X = 0 QAQB = 01 X = 0

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8-5 Qn Qn+1

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8-5

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8-5 n

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8-5

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8-5 1 3 7 2 4 6 1-6 (1)(a) 0 5 22 < 6 < 23 3 T

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8-5 (3)(b) 0 5

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8-5 (4)

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8-5 (5) TCTB TA (c)

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8-6 n -n

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8-6

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8-6 n -2n

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8-6 ()

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8-6 n Q K J-2n Q K- ( 2n 1 )

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8-6 ()

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8-6

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8-6 8-26 J-K D DA QA QB QC QD = 0000 DA = = 1 1 QA QB QC QD = 1111QD = 1 0 0 QA QB QC QD 0000 0000100011001110111101110011 00010000 8 -8

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8-7 Moore machineMealy machine

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8-7

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8-7

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8-7

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8-7

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8-7

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8-7 (I) 011 f 10

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8-7 S1 0 0 S1 1 S1 S2 0 1 S2 0 0 S1 0 1 S2 S3 011 S3 1 011 0 S1 0 1 S0

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8-7 (b) f I S0S3 4 2 D

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8-7 S0 = 00S1 = 01S2 = 10S3 = 11 2 D (c)

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8-7 (6) DB DA IBA (d) f

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8-7 (7)(e)

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8-7 8-9

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8-7

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8-7 (4) S0 = 00S1 = 01S2 = 10(c)

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8-7 (5)(d)

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8-7 (6)(e)

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8-7 2 11 TC 1 0 00 TC 1 0

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8-7

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8-7 (4)(c)

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8-7 (5)(d)

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8-8

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8-8

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8-8 tri-state register 8-31

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8-8