数字电路与逻辑设计试题.doc

1、We will continue to improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of ev

2、aluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication “zero resista

3、nce“. To constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; t

4、o perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure “zero.“ To streng

5、thening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health m

6、edical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business

7、 of “zero risk“. To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to

8、 implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standa

9、rdize trading, and strive to achieve “according to law, standardize and fair.“ Innovation of performance management, to ensure that potential employees “zero fly“. To strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve perf

10、ormance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in “five type Enterprise“ construction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening “four good“ leadership construction, ful

11、l play levels cadres in enterprise development in theof backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key l

12、ink of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. To cons

13、cientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power gener

14、ation company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together acr

15、oss 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy数字电

16、路与逻辑设计试题 3参考答案一. 填空题(10)1 一个触发器有 Q 和 Q 两个互补的输出引脚，通常所说的触发器的输出端是指 Q ，所谓置位就是将输出端置成 1 电平，复位就是将输出端置成 0 电平。2 我们可以用逻辑函数来表示逻辑关系，任何一个逻辑关系都可以表示为逻辑函数的 与或 表达式，也可表示为逻辑函数的 或与 表达式。 3计数器和定时器的内部结构是一样的，当对不规则的事件脉冲计数时，称为 计数 器，当对周期性的规则脉冲计数时，称为 定时 器。4当我们在计算机键盘上按一个标为“3 ”的按键时，键盘向主机送出一个 ASCII 码，这个 ASCII 码的值为 33H 。5在 5V 供电的数

17、字系统里，所谓的高电平并不是一定是 5V，而是有一个电压范围，我们把这个电压范围称为 高电平噪声 容限；同样所谓的低电平并不是一定是 0V，而也是有一个电压范围，我们把这个电压范围称为 低电平噪声 容限。二. 选择题(10)1在数字系统里，当某一线路作为总线使用，那么接到该总线的所有输出设备（或器件）必须具有 b 结构，否则会产生数据冲突。a. 集电极开路； b. 三态门； c. 灌电流； d. 拉电流2TTL 集成电路采用的是 b 控制，其功率损耗比较大；而 MOS 集成电路采用的是 a 控制，其功率损耗比较小。a. 电压； b.电流； c. 灌电流； d. 拉电流3 欲将二进制代码翻译成输

18、出信号选用 b ，欲将输入信号编成二进制代码选用 a ，欲将数字系统中多条传输线上的不同数字信号按需要选择一个送到公共数据线上选用 c ，欲实现两个相同位二进制数和低位进位数的相加运算选用 e 。 a. 编码器； b. 译码器； c. 多路选择器；d. 数值比较器；e. 加法器； f. 触发器； . 计数器； h. 寄存器4 卡诺图上变量的取值顺序是采用 b 的形式，以便能够用几何上的相邻关系表示逻辑上的相邻。a. 二进制码； b. 循环码； c. ASCII 码； d. 十进制码5 根据最小项与最大项的性质，任意两个不同的最小项之积为 0 ，任意两个不同的最大项之和为 1 。a. 不确定；

19、b. 0 ； c. 1 三. 简答题(50)1分别写出（或画出）JK 、D、T 和 T四个触发器的特征方程、真值表和状态转换图。2请分别完成下面逻辑函数的化简。1). )DECBA(*)E(CBA(F答：原式 )(*)D( )CBA()(DEDEE2). )HBA)(C)(BA(FWe will continue to improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensu

20、re smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related t

21、ransactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication “zero resistance“. To constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved infor

22、mation resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology

23、 application of training, improve employees application information system of capacity and level. Humanistic care to ensure “zero.“ To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care dif

24、ficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood

25、 and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business of “zero risk“. To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to clo

26、se concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition,

27、 and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize trading, and strive to achieve “according to law, standardize and fair.“ Innovation of performance management, to ensure that potential employees “zero f

28、ly“. To strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in “five type Enterprise“ construction i

29、n the of core role, and fighting fortress role and pioneer model role; to continues to strengthening “four good“ leadership construction, full play levels cadres in enterprise development in theof backbone backbone role; to full strengthening members youth work, full play youth employees in company

30、development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen s

31、afety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. To conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees

32、, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we ar

33、e enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work ha

34、rd! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happyABC 1 11 1 Y1Y2F1F3F2F4F5F6答：原式的对偶式为：)HE(ABDCABF=A( )HE(BDC)(原3请分别说明 A/D 与 D/A 转换器的作用，说明它们的主要技术指标，并进一步说明在什么情况下必须在A/D 转换器前加采样 保持电路。答：A/D 与 D/A 转换器分别能够将模拟量转换成数字量与数字

35、量转换成模拟量，通过这样的转换电路，能够将模拟系统和数字系统联系起来，实现对模拟系统的检测、监视和控制。A/D 与 D/A 转换器的主要技术指标分别为转换进度和转换时间。因为 A/D 转换需要一定的时间，当在这段时间里，被转换的信号发生改变，将使转换结果不准确，必须将要转换时刻的模拟量保持下来，确保转换期间该值的稳定。4分析下图所示电路的逻辑功能（写出表达式，列真值表描述功能） 。答：列出其中间函数。 ， ， ， ， ，ABC=1+2AB=F3C4B=F5)(F5)+4(3F2X=6得 +y1BCA2（2）列出真值表A B C Y1 Y20 0 0 0 00 0 1 1 00 1 0 1 00

36、 1 1 0 11 0 0 1 01 0 1 0 1We will continue to improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post indepe

37、ndent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full c

38、ommunication “zero resistance“. To constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enter

39、prise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care t

40、o ensure “zero.“ To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, or

41、ganization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management

42、, ensure that the business of “zero risk“. To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthenin

43、g track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention c

44、apacity. To further standardize trading, and strive to achieve “according to law, standardize and fair.“ Innovation of performance management, to ensure that potential employees “zero fly“. To strengthen performance management, process control, enhance employee evaluation and levels of effective com

45、munication to improve performance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in “five type Enterprise“ construction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening “four good“ le

46、adership construction, full play levels cadres in enterprise development in theof backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on

47、 enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety man

48、agement mechanism. To conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the p

49、ulse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together across 2013 full of challenges a