用数据选择器设计组合逻辑电路

用数据选择器设计组合逻辑电路XX0001A1109D\q00001解一:S=AB/C/A/B/C/A/BC/A/BCABCCADAAD=C/;D=1;D=C/;D=C0123 (3)连接电路：CAB (2))把所求逻辑函数的表达式变形：(4分)^AB/C/A/B/C/A/BC/A/BCABC二(A/B/)C/(A/B)1(AB/)C/(AB)C (3)、确定电路连接：(4分)S=1,即卩S/=0A=A.B=A023 (4)、画出连接图：(2分)cDY2sA]Ao44rXXoooQo1qioq000ABCACABC图(a)、(b)所示。(10分)D2v6-----------0 (1)、把所求逻辑函数的表达式变形：(4分) (3)、画出连接图：(2分)=A'BC'AB'CABCA'B'C丫=(D°AAo■D1AiAo■D2AAo-D3AiAo)■SS=0；A=A<|；B=A；D=C;D^=C';D^=C;D^=C0o乙二ABCABCABCBCZ2=ABCABCABY^=(A1A0D10'A1A0D11A1A0D12'A1A0D13)S1Y2=(A1A0D20A1A0D21A1A0D22■A1A0D23)S21100004XX00110101Y0DA6D1DY2sAABC000001010011100110Y0000Y=A/BCAB/CABC/ABC’’=(0)B/C/(A)B/C(A)BC/o3o3BCo2o■:■Di222io■'■32oY=o2o■:■Di222io■'■32o421o52io6?io72io■DAAA421o52io6?io72ioWNA2A]AQDA2A]AQDDDDnYDD”BDDD”B35解:ABCA/BCA/BC/：11O213O11O213O42152117DD=D42152117DD=D=D=D=O；D=D=D-1o145723e (3)连接电路：A2州74HC151州74HC151WYIB:试用八选一数据选择器74LS151实现如下逻辑函数：丫二ABCA/BC-A/B。解:ABCABCYABCABC二二)A/B/C/ABABC(0)ABC(1)ABC(0)ABC(0)ABC(1)ABC(0)ABCD=D^=D=D=D=0；D=D=D=10457236-------------f——VCCo2Ao121o221o■D32AoYo2Ao121o221o■D32Ao4215216?107W=Y/A74HC151Y1A[|DOD[D?D3D4D5DDW61、(15分) (1)列写真值表(3分)ABCABClABClMY0000000Y0000K00000a00化简得：丫二皿/人乜乞/MA/BCMAB/CMABC/ABC变形^M/A/B/C/0A/B/C0A/BC/MA/BC01234267比较可知:令A2=A,A<|=B,AQ=CD=M',D^=0,D=0,D=M,02347D=0,D^M,D^M,47 (4)电路连线图为：(6分)AACAW2AgDpDDDgD4D5DgD卢丫二D°A2AADAA’AD3A2AAD4A2A；AD5A2A’ADGAQAD7A2AAWNA]A]135AQDDDDnD135YDD”B®CDABKOO0111101X1一或式”为:10X001XX10XXF=ABCD0ABCD1ABCD2ABC4ABCDABCD5ABCD6ABC4Y3D3D4、电路图为:7Ys74LS151EbEEhDjDFDjDiD?AAFA,B,C,D八m(3,4,5,6,7,8,9,10,12,14)丫2io=A2io2ioA2ioo4o4D■2l■2loA■A2AoiIA210iIA210D^A2AAo2A02A0AA