东北大学19秋《数字电子技术基础Ⅰ》在线作业123(满分)
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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)=Σm(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.8×3
B.8K×8
C.256×8
D.256×256
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128×1的RAM拓宽为1024×8,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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