《珠江学院数字电子技术期末考试卷及答案.doc》由会员分享，可在线阅读，更多相关《珠江学院数字电子技术期末考试卷及答案.doc（124页珍藏版）》请在三一文库上搜索。
1、华南农业大学珠江学院期末考试试卷2011-2012学年度 下 学期 考试科目：数字电子技术考试年级：_2010_级 考试类型：（闭卷）B卷 考试时间： 120 分钟学号 姓名 年级专业 题号一二三四五六总分得分得分评卷人一、单项选择题（本大题共15小题，每小题1分，共15分）在每小题列出的四个备选项中只有一个是最符合题目要求的，请将其代码填写在题后的括号内。错选、多选或未选均无分。1. 两输入与非门输出为0时，输入应满足【 】。A两个同时为1; B两个同时为0 C两个互为相反; D两个中至少有一个为02. 下列逻辑函数中，与相等的是【 】。A. B. C. D. 3. 与十进制数（53.5）1
2、0等值的数或代码为【 】。A.(0101 0011.0101)8421BCD; B.(35.8)16 C.(110101.1)2 ; D.(65.4)84. 下列函数中【 】式是函数Z=AB+AC的最小项表达式。A. B. C. D. 5. 逻辑函数F(A,B,C)=m(0,1,4,6)的最简“与非式”为【 】。A. Y= B. Y= C. Y= D. Y=6. 同步时序电路和异步时序电路比较，其差异在于后者【 】。A. 没有触发器 B. 没有稳定状态C. 没有统一的时钟脉冲控制 D.输出只与内部状态有关7. 逻辑电路如图11所示，A=“0”时，C脉冲来到后，D触发器【 】。图1-2A. 具有
3、计数功能 B. 置“0” 图11 C. 置“1” D.状态不变8. OC门组成电路如图1-2所示，其输出函数F为【 】。A. F=AB+BC ； B. F=； C. F=(A+B)(B+C) ； D. F=。9. 若将一个TTL异或门（设输入端为A、B）当作反相器使用，则A、B端应【 】连接。A. A或B中有一个接高电平1； B. A或B中有一个接低电平0；C. A和B并联使用； D. 不能实现。10. 测得某逻辑门输入A，B和输出F的波形如图1-3所示，则F（A，B）的表达式为【 】。 A. F=AB B. F=A+B C. F= D. F=AB11. 测得某逻辑门输入A，B、C和输出F的波
4、形如图1-4所示，则F（A，B）的表达式为【 】。A. F= B. F=AB+C C. F=AB+ D. 无法确定图14图1312. 下图由TTL门电路组成的各电路中，能实现 F =AB的电路是【 】。A. B. C. D. 13. 图示各个CMOS门电路输出端逻辑表达式Y=A的是【 】。100YA&100KYA&100kYA1100KYA1ENA. B. C. D.14. 图15所示电路中，CP脉冲的频率为4KHZ，则输出端Q的频率为【 】。图15A. 1 kHZ B. 2 kHZ C. 4 kHZ D. 8 kHZ15. 为实现将JK触发器转换为D触发器，应使【 】。A. J=D，K= B
5、. K=D，J= C. J=K=D D. J=K=得分评卷人表21二、填空题（本大题共10小题，每小题1分，共10分）1. 已知某逻辑函数的真值表如表2-1所示，F的逻辑表达式为【 】。2. 逻辑图如图2-1所示，输出F的最简与或逻辑表达式为【 】。3. 逻辑图如图2-2所示，输出F的最简与或逻辑表达式为【 】。图2-1图2-24. 图23为四选一数据选择器，AB为地址信号，当AB=01时，Y=【 】。5. 半加器逻辑符号如图24所示，当A=“1”，B=“1”时，C和S分别为【 】和【 】。 6. n个输入端的二进制译码器，共有【 】个输出端。对于每一组输入代码，有 个输出端有有效电平。7.
6、如果对计算机键盘上108个符号进行二进制编码，则至少要【 】位二进制数码。8. 半导体数码显示器的内部接法有两种形式：共【 】接法和共【 】接法。9. 首尾相连的n位移位寄存器称为【 】计数器，其有效状态数为【 】。10. T触发器的特征方程是【 】。得分评卷人三、判断题（本大题共10小题，每小题1分，共10分）1. 在普通编码器中，任何时刻都只允许输入两个编码信号，否则输出将发生混乱。 【 】2.若两个函数具有不同的逻辑表达式，则两个逻辑函数必然不相等。 【 】3.同步时序逻辑电路具有统一的时钟CP控制。 【 】4.D触发器的特性方程为Qn+1=D,与Qn无关，所以它没有记忆功能。 【 】5
7、.组合逻辑电路中有具有记忆功能的逻辑部件。 【 】6.触发器的0状态定义为：Q=0， =0. 【 】7.现态和次态是两个相邻离散时间里触发器输出端的状态. 【 】8.一个四位数比较器进行数值比较时，只有四位数全部比较完才能 产生比较结果。 【 】 9.设 A、B、C为逻辑变量,若A+B=A+C,则B=C. 【 】 10. 下图电路实现Y= 【 】得分评卷人四、逻辑函数化简题（本大题共2小题，每小题5分，共10分）1F（A，B，C，D）=m（0，1，2，3，6，8,10）2得分评卷人五、组合逻辑电路设计题（本大题10分）在举重比赛中，有A、B、C三位裁判，其中A为主裁判，当两位或两位以上裁判（其
8、中必须包括A裁判在内）认为运动员上举合格，才可发出合格信号，试用与非门设计上述要求的组合逻辑电路。要求：列出逻辑状态表；写出表达式；画出逻辑图。得分评卷人六、同步时序电路分析题（本大题15分）时序逻辑电路如下图所示，设电路初始状态为Q2Q1Q0=000。列出驱动方程、状态方程、状态转换表,画出状态转换图并判断是否能自启动。得分评卷人七、N进制计数器设计题（本大题10分）利用两片74LS161构成49进制加法计数器（可在如图7-1上连线画图；74LS161功能表见附表7-1）。要求： 写出控制逻辑表达式； 画出连线图附表7-1 74161的状态表图7-1得分评卷人八、中规模集成电路实现逻辑函数题
9、（本大题10分）。用集成二进制译码器74LS138和与非门实现逻辑函数Y=ABC+（B+C），画出逻辑图。得分评卷人九、画波形图题（本大题共3小题，前两小题各3分，最后小题4分，共10分）1. 边沿JK触发器CP、J、K的波形如下图所示,画出触发器Q与的波形,设触发器初始状态为0. 2.电路如下图所示，FF0 为J K触发器，FF1为D型触发器，它们的初始状态均为0，画出Q0、Q1的波形3.画出下图所示电路输出信号Y的波形,输入信号A、B、C的波形见下图所示。 华南农业大学珠江学院期末考试试卷2011-2012学年度 下 学期 考试科目：数字电子技术考试年级：_2010_级 考试类型：（闭卷）
10、B卷 考试时间： 120 分钟学号 姓名 年级专业 一、单项选择题（本大题共15小题，每小题1分，共15分） 15 D B A D C 610 C B A A D 1115 B C D B A二、填空题（本大题共12小题，每空1分，共15分） 1. A+ 2.B+ 3. 4. C 5. 1，0 6. 2n 7. 7位 8. 阳；阴 9. 2n； ；2n -1 10. 三、判断题（本大题共15小题，每小题1分，共15分） 15 X x X X 610 X X X四、逻辑函数化简题（本大题共2小题，每小题5分，共10分）1F（A，B，C，D）=m（0，1，2，3，6，8,10）=2=五、组合逻辑电
11、路设计题（本大题10分）在举重比赛中，有A、B、C三位裁判，其中A为主裁判，当两位或两位以上裁判（其中必须包括A裁判在内）认为运动员上举合格，才可发出合格信号，试用与非门设计上述要求的组合逻辑电路。要求：列出逻辑状态表；写出表达式；画出逻辑图。解答：A B C Y0 0 00 0 10 1 00 1 11 0 01 0 11 1 01 1 100000111(3) 逻辑图& & ABCY & 六、同步时序电路分析题（本大题15分）时序逻辑电路如下图所示，设电路初始状态为Q2Q1Q0=000。列出驱动方程、状态方程、状态转换表,画出状态转换图并判断是否能自启动。1.驱动方程：D0 = CP0 =
12、 CP1=CP2=CPD1 = D2 = 2.状态方程：Q0n+1 =Q1n+1 =Q2n+1 =4.状态转换表：Q2nQ1nQ0nQ2n+1Q1n+1Q0n+10000010010110100010111111000001010101100001111105.状态转换图：6.能自启动七、N进制计数器设计题（本大题10分）利用两片74LS161构成49进制加法计数器（可在如图7-1上连线画图；74LS161功能表见附表7-1）。要求： 写出控制逻辑表达式； 画出连线图解：SN =S49 =110001 八、中规模集成电路实现逻辑函数题（本大题10分）。用集成二进制译码器74LS138和与非门实
13、现逻辑函数，画出逻辑图。1）Y=ABC+（B+C）=ABC+BC+B+C2) 写出真值表A B C Y000000110101011110001010110011113) 确认变量和输入关系Z=选 3 线 8 线译码器 74LS138令A2=A ;A1=B;A0=C4) 画连线图,在输出端需增加一个与非门,九、画波形图题（本大题共3小题，前两小题各3分，最后小题4分，共10分）1. 边沿JK触发器CP、J、K的波形如下图所示,画出触发器Q与的波形,设触发器初始状态为0. 2.电路如下图所示，FF0 为J K触发器，FF1为D型触发器，它们的初始状态均为0，画出Q0、Q1的波形3.画出下图所示电
14、路输出信号Y的波形,输入信号A、B、C的波形见下图所示。解：Y=(A+B)C 试卷第124页共124页（英文版 ） easily blame, to prevent the broken window effect. Supervise the leading cadres to play an exemplary role, take the lead in the strict implementation of the and , lead to safeguard the solemnity and authority of the party discipline, ensure t
15、hat the party discipline and the laws and regulations for implementation in place. Throughout the discipline in the daily supervision and management, strengthen supervision and inspection, from the thorough investigation of violations of discipline behavior. Strengthen to key areas, key departments
16、and key projects as well as the masses reflect the concentration of the units and departments for supervision. - strengthening supervision, discipline inspection and supervision of cadres to set an example for compliance with the and is a man must be hexyl, blacksmith needs its own hardware. Discipl
17、ine inspection organs as the executor of the party discipline, and supervisor of the defenders, for its supervision must be more strictly, discipline inspection and supervision of cadres to firmly establish the awareness of Party Constitution, sense of discipline and rules consciousness, politics lo
18、yalty, sense obey. Action speak Ji Ordinance to set an example of the regulations of the rule of law, strengthen supervision and accept the supervision of the firmness and consciousness, do comply with and . To firmly establish the discipline must first be disciplined, the supervisor will be subject
19、 to the supervision of concept, and consciously safeguard and implement party compasses party, take the lead in practicing three strict real strict, so loyal, clean, play. To be good at learning, the Constitution and the as morality, politics and brought to fruition; to implement , do not want to, d
20、are not, not with disciplinary ruler to supervision; to discipline a ruler, often the control inspection, and consciously in the ideological red line to draw the row Ming Good accumulation is indeed the bottom line, so that the heart has fear, said to have quit, the line has ended. Attached: indiffe
21、rent to heart, calmly to the table in our life, there are many unpredictable things will happen, some good, some bad things, we cannot control is powerless to stop, but with time, you will find in life sometimes turns out to be not good, some bad things finally turned out to be a good thing, but the
22、n we muddy however did not know, this is the life teach us things. 1, life can be complex, can also be simple. Want simple life of precipitation, to have enough time to reflect, to make Become more perfect. Life is the most important thing is not to win, but the struggle; not to have conquered, but
23、to have fought well. 2, the plain is the background of life. Live a plain life, give up on themselves is not a coward, but the wise answers; not disillusioned after the heart, such as ashes, but experience the storm after the enlightenment; not unrewarding perfunctorily, but calm attitude of life of
24、 unrestrained self-confidence. Plain living, there is no noise noisy, no earthly troubles, more did not fill in the discontent of desire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of process, d
25、eath is a kind of ending. Give up this giving up is the helpless, do not give up the abandoned, do not give up this giving up is ignorance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes we becau
26、se of too narrow-minded, too care around the chores and penny wise and pound foolish, not worth the candle. Some things to attract trouble and worry, completely depends on how we look at and deal with it. Dont always take everything back to things, and dont get into a blind alley, dont want to face,
27、 dont be narrow-minded. Poke to care, is a kind of open-minded, a free and easy. 5, I am not afraid of others behind me a knife, I afraid to look back and see stab me, is my intention to treat people; I am not afraid of the truth to tell the best friend, Im afraid he turned to it as a joke to tell d
28、ont 6, when we are in a positive frame of mind, you will find many good things; and when we are in a negative state of mind, you will find many depressed things; life happy and worry, all is you of life attitude, optimistic, good luck; loss of sink, Eritrea company. When you are in adversity, may wi
29、sh to change a point of view to think everything over to the good Think, because good mentality decided the fate of the! 7, people are tired, rest; heart tired, calm. Grow up, mature, this society read. Tired and sad, squat down, to their a hug. Because the world no one can sympathize with you, have
30、 mercy on you. You cry, tears is your own; you pain, no one can understand. Then you only tears to smile. 8, each people have youth,Each youth are a story, the life of the world never gets easier, I want what, wish the world all know, as has been the same; now want anything, for fear that others kno
31、w, or like to lose the same. 9, the heart move, everything in the world is followed by birth, Rangrang, important thing is often the most difficult to open ones mouth, because words will reduce its importance; to let strangers people care about your life in the good things, the original is not easy
32、10, do not blame, do not laugh at who, also dont envy who. Like a person is a kind of feeling, not like a person is true. The truth is easy to explain, I feel Is unspeakable. The best travel life is that you in a strange place found a long lost touched. 11, happy life not in the bustling in, and in
33、the peace of mind; no matter how many grievances, how uncomfortable, and ultimately to heal themselves or their own, others may got you to comfort, but never know your heart is how wanjianchuanxin. 12, maam, like a movie, learn to appreciate, learn to be grateful, learn tolerance, and goodness, help
34、ing others. Instead of accusing the society, as into one; and an exception is better to give than to what 13, dont envy him A sum of, dont lose your life and the life, respectively is: the former is a we experienced cannot escape in a day finally will last minute, while the latter is our persistent,
35、 we want to cherish the memory of those people and things. 14, learn to smile, learn to strong, the world you know so many people, so many people and you are, you cannot change also cant let everyone like you, so also do not want to do. Life is too short to go crazy to love to go to waste, to chase
36、the dream to regret. 15, when temper, a blessing to go. A wounding elegant people, the key is to control their own emotions. With the mouth is the most stupid behavior. A control negative emotions than a can take a city more powerful water flow slow, language is expensive. People spent two years of
37、time to learn to speak, but to spend a few years time to shut up. That is a kind of ability, that is a kind of wisdom. 16, life is not perfect, sometimes, growth is not a cry, not an eyeful of tears, there is no trace of emotion, there is no gleam of hope, no desire, no action, no static, there is o
38、nly one kind of downward sinking feeling, sink A murky? 6? 7? 6? 7 sink? 6? 7? 6? 7 toward the bottom of the sink. 17, in some way, do not go, you will not know the other side scenery is beautiful. To you is not good, you do not mind too much, no one has an obligation to you; you learn knowledge, is
39、 you have weapons, you can start from scratch, but not unarmed; how do you treat people, does not represent how others treat you, if cannot see through this point, only inviting worry. 18, time is like a sponge in the water, as long as you are willing to squeeze, the total water is still there. Ever
40、y life, after the ups and downs The best test of live, to life, survival and continuation, do not stop the struggle in the joys and sorrows of life on the road, so that different soul to bear life beat, acceptance of suffering. 19, indifferent to heart, calmly in table, elegant and comfortable life,
41、 do not take what is so important. The pursuit will be disappointed; to be alive, you will have trouble. Life is the most afraid of what all want to care about, but also what all grasp is not firm, without scenery, separated populations, such as not to desire, all docked in the fate of the end. Why is too rigid, the natural, to go stay not