电子技术
description
Transcript of 电子技术
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4.1 4.2 4.3 4.4 4.5 4.6
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01R-SDJKT 4.1
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4.2
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RD=0, SD=111001010
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RD=0, SD=101111010
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RD=1, SD=010101011
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RD=1, SD=000110101
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RD=1, SD=110111001
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RD=1, SD=1110110
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RD=0, SD=01RD=SD=010
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1. RD=SD=1Q2. SDQ = 1SD 1 RD Q = 0RD 0
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4.3.1 RS CPRS 4.3
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CP=00
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CP=11
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Qn+1 --- Qn ---
R
S
Qn+1
0
0
Qn
0
1
1
1
0
0
1
1
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RS CPRSQ1CP
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4.3.2 D
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CP=0ab0
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CP=1abDD=01011001
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CP=1abDD=11100110
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D
Qn+1
0
0
1
1
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CPDQD
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4.3.3 T T1T
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1Q=0
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T1. CP=12.
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TFFRS
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10FFF
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1F0
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CP FFCP
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RDSDCQ
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CPQ
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2TTTTR2S2CFR1S1CFT
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T
0
1
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CPQT
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3JKR2S2CFJKJK
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JKJ=K=0
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JKTT=1J=K=1
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JK Qn=0Qn+1=1J=1K=0Q=0,Q=1
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JK Qn=1FQn+1 =1
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JKQn+1=0J=0K=1
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CPKJQ T
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1. JKDCQKJCP 4.4
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2. JKTCQKJCP
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3. DT
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4.5
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4 .5.1 CP=1 CP=0
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D
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CP
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CQCQ
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4 .5.2 FFCP
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DCPDCP=1 Dt1
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CPDQCPQ1
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CPDQCPQF
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CPDQS1=0t1Q0
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CPDQt2Q1
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CPDQ10D=1,FD1Q1
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CPDQ10 CPFF
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DCP=1D=1CPQ0CP=1
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CQD
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4 .5.3 CP=1CP=1CP=0D
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Q=0D=11CP=0c d1000
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1c=1 d=1abab01000
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CPcdc=1d=011Q1
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CPd=0c,b=1d=01CP=1D001
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1. 2.
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74LS175DD 4.6
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1Q1D2Q2DGND4Q4D3Q3DUSC74LS175
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+5VD1D2D3D4 CLRCPCP74LS175
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D1D2D3D4 CLRCP+5VCP1174LS175
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D1D2D3D4 CLRCPCP+5V00CP
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5.1 5.2 5.4 5.5 5.3
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5.1
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5.2.1 5.2
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A0--A3Q0--Q3
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5.2.2
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- A3A2A1A0 1011 Q3Q2Q1Q0 1011
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D0 0D1 Q0D2 Q1D3 Q21 0 1 10 1 1 0 0 1 1 0 1 1 0 0 1 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Q3Q2Q1Q0 1011
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Q3Q2Q1Q0 1011
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- L.Q3
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- RQ0
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SS0 S1 74LS194
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011110 00 11 01 1 (QA)(QD)
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5.2.3 1.:(1) 774LS194(2) QD2
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2.:
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3.: 5V
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5.3.1 1. 2. ()5.3
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5.3.2 1.
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10101010100 010 1011 0 11 1000 0010 11. 2. Q2Q1Q03. 000111
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5.3.3 2.
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:1. J2 = K2 = Q1 Q0J1 = K1 = Q0J0 = K0 = 1Q0 CPQ1Q01CPQ2Q1Q011CP
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2. 2 0 0 1 0 0 1 1 1 1 0 1 0 1 0 0 0 0 0 0 0 1 1 0 0 1 3 0 1 0 0 0 0 0 1 1 0 1 14 0 1 1 1 1 1 1 1 1 1 0 0 5 1 0 0 0 0 0 0 1 1 1 0 1 6 1 0 1 0 0 1 1 1 1 1 1 0 7 1 1 0 0 0 0 0 1 1 1 1 1 8 1 1 1 1 1 1 1 1 1 0 0 0
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3. CP
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5.3.4 1. J2 = Q1 Q0 K2 1 J1 = K1 1
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2. 1 0 0 0 0 1 1 1 1 1 0 0 1 2 0 0 1 0 1 1 1 1 1 0 1 0 3 0 1 0 0 1 1 1 1 1 0 1 14 0 1 1 1 1 1 1 1 1 1 0 0 5 1 0 0 0 1 1 1 0 1 0 0 0
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1000100 2CP 3. ( )
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1111101014. 1 1 1 1 1 1 1 0 1 0 0 0 1 1 0 0 1 1 1 0 1 0 1 0 1 0 1 0 1 1 1 0 1 0 1 0
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5.
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( Flop-Flip)5.4.1 ABC A AB B BC C CA A5.4
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(1) 6 AABBBCCCA 3 (2) DJKJK
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QCQBQA (3) QAQBQCABC10
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(4) 0 0 0 0 0 0 1 1 0 1 0 0 0 1 1 0 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 0 0 0 0 X0 1 1 X1 0 X 11 1 X 0 X01
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(5) (6)
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(7)
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5.4.2 1. - - 74LS90 74LS90 2 (CPAQA) 5 (CPBQDQCQB) CPCPA CPBQDQCQBQA(1) 74LS90
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74LS 90
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74LS 90
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74LS 90
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74LS 90 1. 74LS 90R 9(1)R 9(2)0 2. R 0(1)R 0(2) 1
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1 8421
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2 5421
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1. 8421 0 0 0 0CP0 1 1 0(2) 74LS900110
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? ?
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2. 74LS 908421 36 1. 749010367490 QD
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2. 36 3 60 0( 0011 0110 )
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74LS 908421 36
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3. 74LS 90 5421
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QAQDQCQB 1001
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8421 QDQCQBQA 0110 5421QAQDQCQB 1001
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2. 74LS163 74LS 90 Q 0(1) = Q 0(2) = 1 0CP 74LS163 CLR0
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74LS 163 (1) 74LS163
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74LS163
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1. 74LS1630 0 0 10 0 1 00 0 1 10 1 0 00 1 0 1 CLR 0(2) 74LS163
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QDQCQBQA 0110 . 74LS 90: . 74LS 163:QDQCQBQA 0101
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2. 74LS163(1) 74LS163(2)
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. 1 5.5
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1Hz !Ux
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Q2Q1Q0=001uxCPA1.
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Q2Q1Q0=100000
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Q2Q1Q0=011111110ux
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2.
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Q2Q1Q0
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2.
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2. Q2Q1Q0