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1、电子科技大学2013-2014学年第二学期“数字逻辑设计及应用”课无呆考试题（半期）（120分钟）考试H期2014年hH—・二三四五八七八九十总分评卷教师I・To行11theanswersinthe"(尸(2,X15=30)1.Given尸=工恢(1,4,5),thenf二口心(0,2,3,6,7),"J(1)+A》c(0，l)•2.(10010011)8421BCD=(1111°°11)2421BCD-3.(01011101)2=(01110011)Gray.4.Open-drainoutputhastwostates,Lowand(Hi-Z).
2、1011,[A-C]hVos-compIcmcnt=(01101110).5・Atwo'「complement—°11°1010,Conc's-coniplcmcnt—1111Isitoverflowfor[A-CJtwo^compicmcnt?(VesorNo)[No]XNOR)gateinnegativelogiclevel.6.XORgateinpositivelogiclevelisequivalentto(7.Fivevariablescanmake(32)minterms.Thesumofallthemintermsmustbe(1).
3、8.IfthefunctionF=(1,2,3,6),then尸'=工八肚(°，4,5,7).9.Iftheinformationbitsare10010010,thecheckbitis(0)forodd-parity.10.Tomake2014code-words,(11)bitsshouldbeusedatleast.11.GiventhecircuitshowninFigure1,itsoutputexpressionF=((b(a+c)+ac)，).T*叫CYIbYIbT「aTICHIFFigure1II.Thereisonlyoneco
4、rrectanswerinthefollowingauestions』3,X10=30)1.Whichofthefollowingcodeshastheself^complementproperty?(D)A.GrayB.BiquinaryC.8421BCDD.Excess-32.Whichofthefollowing2-inputgatescanformacompletesetoflogicgates?(B)A.ORB.NORC.XORD.XNOR3.WhichofthefollowinggatesisequivalenttoXNOR?(4.Wh
5、ichofthefollowingconnectioniscorrect?(J1AA."C・*BD.-5.Whichofthefollowingexpressionshasnohazard?(B)A.F=W・Y+W'・Z'+X・Y'・ZB.F=W・Y+W'・Z'+Y・Z'C.F=W・Y+W'・Z'+X・Y'・Z+Y・Z'D.F=W・Y+W'・Z'+X・Y'・Z+W'・X・Y'6.Whichofthefollowingstatementsiscorrect?(D)A.Thedualityoftheminimalsumexpressionisitsmi
6、nimalproduct.B.Theminimumsum-orproductexpressionhasnostatic-1hazard・C・Thecanonicalsummusthavehazard.D.Theminimumsum-of-productexpressionhasnostatic-0hazard.7.TheminimumsumofproductforAB+A'C+BCDEFGHis(A).A.A・B+A“CB.A，・B+A・CC.A・B+A“C+B・CD.A・B+A“C+B・C&GivenA=(00111111.0100)2,itse
7、quivalentvaluesforAioandA
8、6are(B)A.(96.58)10,(60.94)16B.(63.25)10,(3F.4)16C.(96.58)10,(60.49)“D.(63.25)10,(3F.94)169.GiventhetimingdiagramasshowninFigure2,theoutputfunctionis(A)・A•/二工叩(3,5,6,7)B./=£vvz(0,1,2,4)C•/二工叩(0,1,2,6)D./=工“(0,1,2,7)Figure210.Aself-duallogicfunctionisaf
9、unctionsuchthatF=FD・Whichofthefollowingfunctionsisself-dual?(
