北科-数电核心知识点自测卷

数字电子技术（双语）核心知识点自测题院(系)班级学号姓名1．(15’)AnalyzethecircuitinFigure1.(1)Writetheoutputexpressionforthecircuit.Figure1(2)Developthetruthtableforthecircuit.(3)Minimizethegatesrequiredtoimplementthefunction.2.(10’)ADflip-flopisconnectedasshowninFigure2.DeterminetheQoutputinrelationtotheclockandinputs.Figure2装订线内不得答题自觉遵守考试规则，诚信考试，绝不作弊3.(20’)Implementathreeinputsparitycheckerwithoddparity.Theoutputis“1”whenthenumberofinput“1”isodd.（1）UsingNANDGatesonly(2)Usinga74LS1518-inputsdataselector/multiplexer.4．(10’)Youwishtodetectonlythepresenceofthecodes1110,1001,0101and1011.Anactive-HIGHoutputisrequiredtoindicatetheirpresence.Developthelogiccircuitwithasingleoutputthatwillindicatewhenanyoneofthesecodesisontheinputs.Foranyothercode,theoutputmustbeLOW.Pleaseusea4-line-to-16-linedecoderwithfewergatesasneeded.5．(15’)Showhowtoconnecttwo74LS161sforamodulus-35counterwithsequence(1,2,…35)10.6．(15’)DeterminethesequenceofthecounterinFigure3，showingtheQ1,Q2andQ3waveforms.Figure37．(15’)Designasynchronousbinarycounterwithsequence0001111000,useJKflip-flops.