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1、电子科技大学二零壹年至二零一学年第二学期“数字逻辑设计及应用”课禾呆考试题（半期）（120分钟）考试H期2013年5月11H―・二三四五八七八九十总分评卷教师I.Tofilltheanswersinthe“(尸(2'X15=3())1.[109.75]I0=(1101101.11)2=(6D.C儿。2.(2713)io=(0010110100010011)242ibcd・3.([-17]io)'ssigned-magnituderepresentationis(10010001),andits8-bittwo'scomplementrepresentationis(11
2、101111)・4.IfXtsigned-magnituderepresentationXSmis111010,then(2X),s8-bitsigned-magnituderepresentationis(10110100),and(X/2)'stwo，scomplementrepresentationis(11110011)•5.IfthefunctionF(A.C)Fis弘,3,C)=m((1,2,4,7),thenthecomplementexpressionofthefunction),(0,3,5,6)andits"dualexpressionis)(1,2
3、,4,7)•6.CMOSthree-statebufferhasthree-stateoutputs,HIGH,LOWand(Hi-Z).7.IfAtwos-compiement=01011010,Btwo's-compiement=10001011,thenwhetheroccursoverflowof-A+B?(YesorNo)[Yes].8.IftheGraycodeis(1110101)咖，thenitscorrespondingbinarynumbercodeis(1011001).9.Thereisastatichazardforthelogiccircui
4、trealizedaccordingtothelogicexpressionF=A'C'+AD+BC,thenthecorrespondinglogicexpressionwiththesamefunctionbutwithoutthestatichazardis(F=A'C'+AD+BC+C'D+A'B或F=A'C'+AD+BC+BD).10.IfVoLmax=0.5V,VoHmin=2.8V,V1Lmax=0.8V,VJHmin=2.1Vfor74LSseries,thenDCnoisemarginisVNL=(0.3)V,VNH=(0.7)V.ILThereiso
5、nlyonecorrectanswerinthefollowingQuestions』3,X10=30)1.Whichisthecorrectoneinthefollowingstatementsforalogicfunction?(A)A.TheminimalexpressionmaybethesumofproductsorproductofthesumsB.TheminimalexpressionistheminimalformwithproductofsumsC.Theminimalexpressionistheminimalformwithsumofproduc
6、tsD.Theminimalexpressionwithsumofproductsisthesamesimplywiththeminimalexpressionwithproductofsums2.Whichofthefollowingstatementsisthewrongonewhenperformarithmeticoperationswithtwobinarynumbers?(C)A.Thereisanoverflowwhenthemostsignificantbit(MSB)generatesacarryoutfortheadditionoftwounsign
7、ednumbers.B.ThereisnotanoverflowfortheadditionoftwocomplementswithdifferentMSB.C.ThereisanoverflowwhentheMSBgeneratesacarryoutfortheadditionoftwotwo'scomplements・D.Thesubtractionoftwotwe/scomplementscanberealizedwithadder.3.Thestatichazardofthecombinationlogiccircuitiscau
