东北大学19秋《数字电子技术基础Ⅰ》在线作业123(满分)

作者:奥鹏周老师 分类: 东北大学 发布时间: 2019-10-04 20:01
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19秋学期《数字电子技术基础Ⅰ》在线作业1
1.[单选题]<p class="MsoPlainText" style="MARGIN: 0cm 0cm 0pt"><font face="宋体" size="3">关于输出“<st1:chmetcnv w:st="on" unitname="”" sourcevalue="0" hasspace="False" negative="False" numbertype="1" tcsc="0"><span lang="EN-US">0</span>”</st1:chmetcnv>有用的<span lang="EN-US">2</span>—<span lang="EN-US">4</span>线译码器来说要完成,</font><span lang="EN-US"><font face="宋体" size="3">Y=<img height="20" width="51" alt="" src="http://file.open.com.cn/ItemDB/98839/043785b7-4d9e-4cb1-a374-23ac8d3ce582/201192314561960.jpg" /></font></span><font size="3"><font face="宋体">的功用,应外加<span lang="EN-US">(<span style="mso-spacerun: yes">     </span>)</span></font></font></p>
    A.或门
    B.与门
    C.或非门
    D.与非门
    正确答案:——B——
2.[单选题]一只四输入端与非门,使其输出为0的输入变量取值组合有__________种。
    A.15
    B.8
    C.7
    D.1
    正确答案:——D——
3.[单选题]当74LS148的输入端按次序输入11011101时,输出为(  )。
    A.101
    B.010
    C.001
    D.110
    正确答案:——B——
4.[单选题]十进制数78所对应的二进制数和十六进制数别离为()。
    A.1100001B,61H
    B.1001110B,4EH
    C.1100001B,C2H
    D.1001110B,9CH
    正确答案::
5.[单选题]以下四种变换器,( )是A/D变换器且变换速度最高。
    A..并联比照型
    B.逐次迫临型   
    C.双积分型   
    D.施密特触发器
    正确答案::
6.[单选题]单稳态触发器输出脉冲宽度的巨细,与触发脉冲宽度( )。
    A.有关
    B.无关
    C.相同
    D.成正比
    正确答案::
7.[单选题]鄙人列触发器中,有捆绑条件的是( )
    A.主从JK  FF
    B.主从D  FF
    C.同步RS  FF     
    D.边缘D  FF 
    正确答案::
8.[单选题]下列触发器中,没有捆绑条件的是( )。
    A.根柢RS触发器 
    B.主从RS触发器
    C.同步RS触发器     
    D.主从JK触发器
    正确答案::
9.[单选题]<span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><span style="mso-spacerun: yes"> </span>若已知</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman','serif'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体"><v:shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"> <img alt="" src="http://file.open.com.cn/ItemDB/98839/1d242186-ec6d-4535-8c70-e308eda80fac/2011923105339257.jpg" /></v:shapetype></span><span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">,判别等式<img height="22" width="171" alt="" src="http://file.open.com.cn/ItemDB/98839/1d242186-ec6d-4535-8c70-e308eda80fac/2011923105352945.jpg" /></span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman','serif'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体"></span><span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">树立的最简略独法是根据以下规则:()</span>
    A.代入规则; 
    B.对偶规则
    C.反演规则
    D.互补规则
    正确答案::
10.[单选题]<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">欲使</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">JK</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">触发器按</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体"><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <img height="27" width="68" alt="" src="http://file.open.com.cn/ItemDB/98839/6c9c858f-da59-48fb-885f-fc97eacdb652/201192420614625.jpg" /></v:shapetype></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">工作,可使</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">JK</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">触发器的输入端不正确的是</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">( )</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">。</span>
    A.J=K=1
    B.J=Q,K=Q
    C.J=Q,K=1
    D.J=0,K=1
    正确答案::
11.[单选题]一个无符号8位数字量输入的DAC,其分辩率为( )位
    A.1
    B.3
    C.4
    D.8
    正确答案::
12.[单选题]N个触发器可以构成最大计数长度(进制数)为()的计数器。
    A.N
    B.2N
    C.N2
    D.2N
    正确答案::
13.[单选题]  下在列各组变量取值中,能使函数F(A,B,C,D)=&Sigma;m(0,1,2,4,6,13)的值为1是。
    A.1100 
    B.1001 
    C.0110 
    D.1110
    正确答案::
14.[单选题]一位8421BCD码译码器的数据输人线与译码输出线组合是____ 。
    A.4:16
    B.1:10  
    C.4:10
    D.2:4
    正确答案::
15.[单选题]要使TTL与非门工作在转机区,可使输入端对地外接电阻RI(  )
    A.>RON
    B.<ROFF
    C.ROFF<RI<RON
    D.>ROFF
    正确答案::
16.[单选题]同步计数器和异步计数器比照,同步计数器的显着利益是()
    A.工作速度高
    B.触发器使用率高
    C.电路简略
    D.不受时钟CP控制
    正确答案::
17.[单选题]同步时序电路和异步时序电路比照,其差异在于后者 ()
    A.没有触发器 
    B.没有共同的时钟脉冲控制
    C.没有安稳状况     
    D.输出只与内部状况有关   
    正确答案::
18.[单选题]某集成电路芯片,查手册知其最大输出低电平UOLmax=0.5V,最大输入低电平UILmax=0.8V,最小输出高电平UOHmin=2.7V,最小输入高电平UIHmin=2.0V,则其高电平噪声容限UNH=(  )
    A.0.3V
    B.0.6V
    C.0.7V
    D.1.2V
    正确答案::
19.[单选题]组合逻辑电路消除竞赛冒险的办法有(   )
    A.前级加电阻
    B.在输出端接入滤波电容
    C.后级加缓冲电路
    D.屏蔽输入信号的尖峰烦扰
    正确答案::
20.[单选题]为发生一个守时脉冲,应选用( )
    A.单稳态触发器
    B.施密特触发器
    C.多些振荡器
    D.双稳态触发器
    正确答案::
21.[判别题]若要完成一个可暂停的一位二进制计数器,控制信号A=0计数,A=1坚持,可选用T触发器,且令T=A。
    A.差错
    B.正确
    正确答案::
22.[判别题]一个N位逐次迫临型A/D变换器结束一次变换要进行N次比照,需要N+2个时钟脉冲。
    A.差错
    B.正确
    正确答案::
23.[判别题]同步时序电路由组合电路和存储器两有些构成
    A.差错
    B.正确
    正确答案::
24.[判别题]D/A变换器的最大输出电压的必定值可抵达基准电压VREF。
    A.差错
    B.正确
    正确答案::
25.[判别题]由两个TTL或非门构成的根柢RS触发器,当R=S=0时,触发器的状况为不定
    A.差错
    B.正确
    正确答案::
19秋学期《数字电子技术基础Ⅰ》在线作业2
1.[单选题]只需当抉择一件事的几个条件悉数不具有时,这件事才不会发生,这种逻辑关系为(  )。
    A.与
    B.与非
    C.或
    D.或非
    正确答案:——C——
2.[单选题]欲使JK触发器按Qn+1=Qn工作,可使JK触发器的输入端不正确的是( )。
    A.J=K=0 
    B.<span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">J=Q,<div><img height="20" width="55" alt="" src="http://file.open.com.cn/ItemDB/98839/131d1d9a-91e6-4777-8b8d-fcb9c888ca66/201192420431998.jpg" /></div></span>
    C.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体"><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <div><img height="30" width="45" alt="" src="http://file.open.com.cn/ItemDB/98839/131d1d9a-91e6-4777-8b8d-fcb9c888ca66/20119242059233.jpg" /></div></v:shapetype></span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">K=Q</span>
    D.<span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">J=0</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">,</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman','serif'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体"><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <div><img height="20" width="55" alt="" src="http://file.open.com.cn/ItemDB/98839/131d1d9a-91e6-4777-8b8d-fcb9c888ca66/201192420444326.jpg" /></div></v:shapetype></span>
    正确答案:——C——
3.[单选题]下列逻辑等式中不树立的是()
    A.<img height="41" width="99" alt="" src="http://file.open.com.cn/ItemDB/98839/4a10e4a6-3f4a-47f0-a5f4-12397a71b429/2011923105048157.jpg">
    B.<img height="32" width="108" alt="" src="http://file.open.com.cn/ItemDB/98839/4a10e4a6-3f4a-47f0-a5f4-12397a71b429/201192310510955.jpg">
    C.<img height="33" width="134" alt="" src="http://file.open.com.cn/ItemDB/98839/4a10e4a6-3f4a-47f0-a5f4-12397a71b429/2011923105111283.jpg">
    D.A+AB=A
    正确答案:——A——
4.[单选题]半导体E2PROM,写入的内容,可以经过_____擦除。( )
    A.紫外线照耀 
    B.电信号
    C.口令
    D.DOS指令
    正确答案::
5.[单选题]一个无符号10位数字输入的DAC,其输出电平的级数为( )。
    A.4
    B.10
    C.1024
    D.2048
    正确答案::
6.[单选题]N个触发器可以构成能存放( )位二进制数码的存放器。
    A.N-1
    B.N
    C.N+1
    D.2N
    正确答案::
7.[单选题]某存储用具有8根地址线和8根双向数据线,则该存储器的容量为______。
    A.8&times;3
    B.8K&times;8
    C.256&times;8     
    D.256&times;256
    正确答案::
8.[单选题] 数据分配器和(   )有着相同的根柢电路结构方法。
    A.加法器
    B.编码器
    C.选择器
    D.译码器
    正确答案::
9.[单选题]下列电路,具有脉冲高低辨别作用的电路是( )。
    A.单稳态触发器
    B.施密特触发器    
    C.多谐振荡器    
    D.双稳态振荡器
    正确答案::
10.[单选题]某电视机水平-笔直扫描发生器需要一个分频器将31500HZ的脉冲变换为60HZ的脉冲,欲构成此分频器至少需要()个触发器  
    A.10
    B.60
    C.525
    D.31500
    正确答案::
11.[单选题]在只读存储器ROM中的内容,当电源断掉后又接通,存储器中的内容______。( )
    A.悉数改动
    B.悉数为0   
    C.不可以意料    
    D.坚持不变
    正确答案::
12.[单选题]欲将容量为128&times;1的RAM拓宽为1024&times;8,则需要控制各片选端的辅助译码器的输出端为______。
    A.1
    B.2
    C.3
    D.8
    正确答案::
13.[单选题]<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 24pt; TEXT-INDENT: -24pt; TEXT-ALIGN: left; mso-char-indent-count: -2.0; mso-layout-grid-align: none" align="left"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">关于输出“</span><st1:chmetcnv w:st="on" unitname="”" sourcevalue="0" hasspace="False" negative="False" numbertype="1" tcsc="0"><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">0</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">”</span></st1:chmetcnv><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">有用的</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">2</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">—</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">4</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">线译码器来说要完成,</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">Y=<v:shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"> <img height="31" width="52" alt="" src="http://file.open.com.cn/ItemDB/98839/a4dc177e-c0fa-4718-943f-3035f9fc9a4c/2011923151632687.jpg" /></v:shapetype></font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">的功用,应外加</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">(<span style="mso-spacerun: yes">  </span>)<o:p></o:p></font></span></p>
    A.或门
    B.与门
    C.或非门
    D.与非门
    正确答案::
14.[单选题]<p><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">图示半导体三极管的工作状况是</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">(<span style="mso-spacerun: yes">  </span>)</span></p><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体"><div><img height="163" width="106" alt="" src="http://file.open.com.cn/ItemDB/98839/03c8e11e-e023-4ada-990c-d1b181bd924b/2011924194436959.jpg" /></div></span>
    A.截止
    B.饱满
    C.扩展
    D.无法计算
    正确答案::
15.[单选题]  半导体三极管做开关元件时,应工作在哪两个区域( )
    A.饱满区和截止区
    B.集电区和发射区
    C.饱满区和扩展区
    D.  扩展区和截止区
    正确答案::
16.[单选题].二极管的开关时刻首要思考(  )。
    A.td
    B.ton
    C.tr
    D.toff
    正确答案::
17.[单选题]由555守时器构成的单稳态触发器,改动控制电压Vco时,则可改动( )。
    A.输出脉冲的幅值 
    B.输出脉冲的周期    
    C.输出脉冲的宽度
    D.对输出脉冲无影响
    正确答案::
18.[单选题]<p><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">测得某逻辑门输入</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体">A</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">、</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体">B</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">和输出</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体">F</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">的波形如图</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体">4</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">所示,则</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体">F</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">(</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体">A</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">,</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体">B</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">)的表达式为(</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体"><span style="mso-spacerun: yes">  </span></span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">)</span></p><p align="left"><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt"></span></p><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt"><div><img height="84" width="197" alt="" src="http://file.open.com.cn/ItemDB/98839/6e5cc844-4daf-4d7f-be70-7c196392e8ec/2011924195058904.jpg"></div></span>
    A.F=AB
    B.<div><img height="24" width="58" alt="" src="http://file.open.com.cn/ItemDB/98839/6e5cc844-4daf-4d7f-be70-7c196392e8ec/2011924195144124.jpg"></div>
    C.<div><img alt="" src="http://file.open.com.cn/ItemDB/98839/6e5cc844-4daf-4d7f-be70-7c196392e8ec/201192419526765.jpg"></div>
    D.F=A⊕B
    正确答案::
19.[单选题](  )称为三极管的饱满深度
    A.iB / IBS
    B. iC / ICS 
    C.IBS / iB
    D.ICS / iC
    正确答案::
20.[单选题]将TTL与非门作非门运用,则剩下输入端应做________处置。
    A.悉数接高电平
    B.有些接高电平,有些接地
    C.悉数接地
    D.有些接地,有些悬空
    正确答案::
21.[判别题]<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt"><font size="3">在同步时序电路的设计中,若最简状况表中的状况数为</font></span><span lang="EN-US"><v:shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><font size="3"><font face="Times New Roman"> <img alt="" src="file:///C:/Documents%20and%20Settings/Administrator/Application%20Data/Tencent/Users/709940092/QQ/WinTemp/RichOle/8J]~(@6W2_S4OY69`}KY~$M.jpg" /></font></font></v:shapetype></span><font size="3"><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">,而又是用</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">N</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">级触发器来完成其电路,则不需检查电路的自建议性。(</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman"> </font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">)</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman"> <o:p></o:p></font></span></font></p>
    A.差错
    B.正确
    正确答案::
22.[判别题]同步时序电路具有共同的时钟CP控制
    A.差错
    B.正确
    正确答案::
23.[判别题]组合电路不富含回想功用的器件。
    A.差错
    B.正确
    正确答案::
24.[判别题]把一个5进制计数器与一个10进制计数器串联可得到15进制计数器。
    A.差错
    B.正确
    正确答案::
25.[判别题]环形计数器假定不作自建议批改,则总有孤立状况存在。
    A.差错
    B.正确
    正确答案::
19秋学期《数字电子技术基础Ⅰ》在线作业3
1.[单选题]若要设计一个脉冲序列为1101001110的序列脉冲发生器,应选用()个触发器。
    A.2
    B.3
    C.4
    D.10
    正确答案:——C——
2.[单选题]关于T触发器,若原态 Qn=0,欲使新态Qn+1=1 ,应使输入T= ( )。
    A.1或/Q
    B.1
    C.Q
    D.以上都不对
    正确答案:——A——
3.[单选题]当TTL与非门的输入端悬空时恰当于输入为(  )
    A.逻辑0
    B.逻辑1
    C.不断定
    D.0.5v
    正确答案:——B——
4.[单选题]为使采样输出信号不失真地代表输入仿照信号,采样频率和输入仿照信号的最高频率的关系是( )。
    A..>= 
    B.<=
    C.>=2 
    D.<=2
    正确答案::
5.[单选题]一位8421BCD码计数器至少需要 ()个触发器
    A.3
    B.4
    C.5
    D.10
    正确答案::
6.[单选题] 一只四输入端或非门,使其输出为1的输入变量取值组合有()种。
    A.15
    B.8
    C.7
    D.1
    正确答案::
7.[单选题]<v:shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:connecttype="rect" gradientshapeok="t" o:extrusionok="f"></v:path><o:lock aspectratio="t" v:ext="edit"></o:lock></v:shapetype><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 15.75pt; TEXT-INDENT: -15.75pt; TEXT-ALIGN: left; mso-layout-grid-align: none; mso-char-indent-count: -1.5" align="left"><v:shape id="_x0000_s1026" style="MARGIN-TOP: 23.4pt; Z-INDEX: -1; LEFT: 0px; MARGIN-LEFT: 279pt; WIDTH: 155.15pt; POSITION: absolute; HEIGHT: 93.6pt; TEXT-ALIGN: left" wrapcoords="-119 0 -119 21438 21600 21438 21600 0 -119 0" type="#_x0000_t75"><v:imagedata o:title="" src="file:///C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\msohtmlclip1\01\clip_image001.png"></v:imagedata><w:wrap type="tight"></w:wrap></v:shape><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"><font face="Times New Roman"></font>如图所示电路,开关</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">A</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">B</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">断开为</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">0</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">,接通为</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">1</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">,灯</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">F</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">亮为</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">1</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">,灭为</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">0</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">,灯</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">F</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">与开关</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">A</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt"><font face="Times New Roman">B</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">的逻辑关系为(</span><span lang="EN-US" style="FONT-SIZE: 12pt"><span style="mso-spacerun: yes"><font face="Times New Roman">  </font></span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">)</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 15.75pt; TEXT-INDENT: -15.75pt; TEXT-ALIGN: left; mso-layout-grid-align: none; mso-char-indent-count: -1.5" align="left"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"><img height="117" width="228" alt="" src="http://file.open.com.cn/ItemDB/98839/9cf61851-ca47-47e5-89a0-119d255250e4/201192312028369.jpg" /></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 15.75pt; TEXT-INDENT: -15.75pt; TEXT-ALIGN: left; mso-layout-grid-align: none; mso-char-indent-count: -1.5" align="left"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"></span><span lang="EN-US" style="FONT-SIZE: 12pt"><o:p></o:p></span></p>
    A.F=AB
    B.<img height="28" width="61" alt="" src="http://file.open.com.cn/ItemDB/98839/9cf61851-ca47-47e5-89a0-119d255250e4/2011923115858616.jpg" />
    C.  F=A+B
    D.<img height="28" width="77" alt="" src="http://file.open.com.cn/ItemDB/98839/9cf61851-ca47-47e5-89a0-119d255250e4/2011923115710363.jpg" />
    正确答案::
8.[单选题]下列逻辑电路中为时序逻辑电路的是
    A.变量译码器     
    B.加法器
    C.数码存放器 
    D.数据选择器   
    正确答案::
9.[单选题]下列触发器中,没有战胜空翻表象的是( )
    A.边缘D触发器     
    B.主从RS触发器    
    C.同步RS触发器
    D.主从JK触发器
    正确答案::
10.[单选题]TTL参数由大到小摆放正确的是(      )
    A.UOHmin、  UIHmin、  UILmax、  UOLmax
    B.UIHmin、  UOHmin、  UOLmax、  UILmax
    C.UOHmin、  UIHmin、  UOLmax、  UILmax
    正确答案::
11.[单选题]CMOS非门的构成是由PMOS和NMOS互补对称联接起来的,将PMOS的栅极G1和NMOS的栅极G2接在一同作输入,而其输出则是__________联接起来。
    A.PMOS的源极S1和NMOS的源极S2
    B.PMOS的源极S1和NMOS的漏极D2
    C.PMOS的漏极D1和NMOS的源极S2
    D.  PMOS的漏极D1和NMOS的漏极D2
    正确答案::
12.[单选题]能驱动七段数码管的闪现译码器是(  )。
    A.74LS48
    B.74LS138  
    C.74LS148
    D.TS547
    正确答案::
13.[单选题]下列数中最大数是。
    A.(100101110)2 
    B.(12F)16 
    C.(301)10
    D.(10010111)8421BCD
    正确答案::
14.[单选题]八输入端的编码器按二进制编码时,输出端的个数是(  )。
    A.2个
    B.3个
    C.4个
    D.8个
    正确答案::
15.[单选题]正逻辑与门恰当于负逻辑的( )
    A.与门 
    B.非门
    C.或门
    D.与非门
    正确答案::
16.[单选题]欲设计0,1,2,3,4,5,6,7这几个数的计数器,假定设计合理,选用同步二进制计数器,最少应运用 ()级触发器
    A.2
    B.3
    C.4
    D.8
    正确答案::
17.[单选题] 十进制数62对应的十六进制数是()。
    A.(3E)16 
    B.(36)16 
    C.(38)16 
    D.(3D)16
    正确答案::
18.[单选题] 用0、1 两个符号对100 个信息进行编码,则至少需要()。
    A.8 位
    B.7 位
    C.9位
    D.6位
    正确答案::
19.[单选题]与逻辑式XY + Y  + YZ 相等的式子是()。
    A.XY+Y
    B.X 
    C.<p><img height="20" alt="" width="50" src="http://file.open.com.cn/ItemDB/98839/0172273f-9b1b-4577-9409-85271a38d3e6/2011924191532785.jpg" /></p>
    D.<div><img height="21" alt="" width="52" src="http://file.open.com.cn/ItemDB/98839/0172273f-9b1b-4577-9409-85271a38d3e6/2011924191835836.jpg" /> <div> <div> </div></div></div>
    正确答案::
20.[单选题]以下TTL电路均匀传输推迟时刻最小的是(  )系列
    A.74
    B.74H
    C.74S
    D.74LS
    正确答案::
21.[判别题]计数器的模是指对输入的计数脉冲的个数。
    A.差错    B.正确
    正确答案::
22.[判别题]同步触发器存在空翻表象,而边缘触发器和主从触发器战胜了空翻
    A.差错    B.正确
    正确答案::
23.[判别题]A/D变换器的二进制数的位数越多,量化单位越小。
    A.差错    B.正确
    正确答案::
24.[判别题]D/A变换器的位数越多,可以分辩的最小输出电压改变量就越小
    A.差错    B.正确
    正确答案::
25.[判别题]A/D变换过程中,必定会呈现量化过失。
    A.差错    B.正确
    正确答案::
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