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单选题电路如图所示,74153是4选1数据选择器,则输出函数表达式为( ).

A.

B.

C.

D.

学科：数字电路与逻辑设计B 2024春季

时间：2024-05-19 15:51:49

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电路如图所示,该电路的实现的逻辑功能是( ).<img src="https://tihai-oss-cloud.itihey.com/img/edbc33ec528ff0093ad3ee6ce71f2ccd.png">

A. F = A⊙BB. <img src="https://tihai-oss-cloud.itihey.com/img/78d9ab9f7e4cad4e6d751d2932d2b31e.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/47935b58ac1e90be1db80c723927a4ab.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/86719ed5e340d560ff3427f1a60dbe37.png">

真值表如图所示,则输出的最简与非-与非表达式为( ).<img src="https://tihai-oss-cloud.itihey.com/img/c7f7e66bd12e461e5b3b658a23d73a56.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/19f32a72e3fb4d85a33b287172d87c7f.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/863c576697326db00655225a06ff47df.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/b9c233ad656ff6c3fd5c3665f8b73a1b.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/00ac06f2083384b5bb8910da33b5c5bc.png">E. 以上答案都不对

某个电路的真值表如图所示,输入既有原变量又有反变量,则用与非门实现的电路为( ).<img src="https://tihai-oss-cloud.itihey.com/img/82b0506f80e8b4af403672cd215665a8.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/2cfd0c6d260bef94e6a57e45d575b6cd.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/6c86dc6dc89e6b69a348729246254b06.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/11f46871c45926cb3f1111e95b025e69.png">D. 以上答案都不对

电路如图所示,该电路的真值表为( ).<img src="https://tihai-oss-cloud.itihey.com/img/89eb00660f80d2571b7a93d860e3c22b.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/ff046cabc06c550b7f87a6c8e10dba59.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/07639c4724d14f7686c46ae5792fbda9.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/4934f3e32bded5a2407fc05c985304b9.png">D. 以上答案都不对

某个组合逻辑电路的输入A、B和输出F的波形如图所示,则输出函数的最简与-或式为( ).<img src="https://tihai-oss-cloud.itihey.com/img/8b7299cffbb6a6124cd2da7b453b59d3.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/78d9ab9f7e4cad4e6d751d2932d2b31e.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/5a6becf424364cb6177fbe19ee874739.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/6d64f193f1afbdeedfc6c4dd0c378851.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/cab7a26d8fcdd13f95688a5fd093da76.png">E. 以上答案都不对

电路如下图所示,74283为四位二进制全加器,输入管脚A4A3 A2 A1、B4B3 B2 B1分别为被加数、加数,输出管脚S4、S3、S2、S1为本位和,输入管脚CIN为低位向本位的进位,输出管脚COUT为本位向高位的进位.分析电路,下列说法正确的是( ).<img src="https://tihai-oss-cloud.itihey.com/img/54c9ad66a18031279a179af508b0fc93.png">

A. S4 S3 S2 S1为1001,COUT为0B. S4 S3 S2 S1为0001,COUT为0C. S4 S3 S2 S1为1001,COUT为1D. S4 S3 S2 S1为0001,COUT为1

集成4位数值比较器级联输入A<B、A=B、A>B分别接001,当输入两个相等的4位数据时,输出FA<B、FA=B、FA>B分别为( )

A. 010B. 100C. 001D. 以上答案都不对

电路如图所示,74138是3线-8线译码器,该电路是( ).<img src="https://tihai-oss-cloud.itihey.com/img/6f83e82c0004c59eef20f5a0b742162f.png">

A. 一位全加器B. 一位全减器C. 一位数值比较器D. 以上答案都不对

用四选一数据选择器实现函数<img src="https://tihai-oss-cloud.itihey.com/img/42f2fc69de01d55ac104f1446327d9bb.png">,应使( )

A. D0=D2=0,D1=D3=1B. D0=D2=1,D1=D3=0C. D0=D1=0,D2=D3=1D. D0=D1=1,D2=D3=0

电路如图所示,74153是4选1数据选择器,则输出函数表达式为( ).<img src="https://tihai-oss-cloud.itihey.com/img/1de349861e0f1fc837217144ae8e92b2.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/81ae62266ae0e81f30a30febc2d64f9f.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/c99b8ce929bca7c00b192aab1d341fcf.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/918e4370fc7bccc63dac3ba2cc1462ca.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/aa34eb8593317ec54c289beb544570a0.png">

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