數(shù)字電子技術(shù)基礎(chǔ)試題及答案1-閻石第四版

數(shù)字電子技術(shù)基礎(chǔ)試題及答案1_閻石第四版一、填空題:(每空3分，共15分)1(邏輯函數(shù)有四種表示方法，它們分別是()、()、()和()。2(將2004個(gè)“1”異或起來(lái)得到的結(jié)果是()。4(TTL器件輸入腳懸空相當(dāng)于輸入()電平。5(基本邏輯運(yùn)算有:()、()和()運(yùn)算。6(采用四位比較器對(duì)兩個(gè)四位數(shù)比較時(shí)，先比較()位。7(觸發(fā)器按動(dòng)作特點(diǎn)可分為基本型、()、()和邊沿型;9(目前我們所學(xué)的雙極型集成電路和單極型集成電路的典型電路分別是()電路和()電路。11(數(shù)字系統(tǒng)按組成方式可分為()、()兩種;12(兩二進(jìn)制數(shù)相加時(shí)，不考慮低位的進(jìn)位信號(hào)是()加器。13(不僅考慮兩個(gè)____________相加，而且還考慮來(lái)自__________相加的運(yùn)算電路，稱(chēng)為全加器。14(時(shí)序邏輯電路的輸出不僅和_________有關(guān)，而且還與_____________有關(guān)。15(計(jì)數(shù)器按CP脈沖的輸入方式可分為_(kāi)__________和___________。16(觸發(fā)器根據(jù)邏輯功能的不同，可分為_(kāi)__________、___________、___________、___________、___________等。17(根據(jù)不同需要，在集成計(jì)數(shù)器芯片的基礎(chǔ)上，通過(guò)采用___________、___________、___________等方法可以實(shí)現(xiàn)任意進(jìn)制的技術(shù)器。18(4.一個(gè)JK觸發(fā)器有個(gè)穩(wěn)態(tài)，它可存儲(chǔ)位二進(jìn)制數(shù)。19(若將一個(gè)正弦波電壓信號(hào)轉(zhuǎn)換成同一頻率的矩形波，應(yīng)采用電路。20(把JK觸發(fā)器改成T觸發(fā)器的方法是。21(N個(gè)觸發(fā)器組成的計(jì)數(shù)器最多可以組成進(jìn)制的計(jì)數(shù)器。22(基本RS觸發(fā)器的約束條件是。J,KJ,K23(對(duì)于JK觸發(fā)器，若，則可完成觸發(fā)器的邏輯功能;若，則可完成觸發(fā)器的邏輯功能。五(分析題(30分)1、分析如圖所示組合邏輯電路的功能。A&Y&&Bandperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirectionyouwant.7.3.14.hangersinstallation7.3.14.1hangerlayouta.acleardesignofhangershouldbeinstalledstrictlyinaccordancewiththedrawingsanddesignsshallnotbeinstalledwrong,missing,etc.B.ownarrangementofpipingsupportandhangersetandselectionshouldbebasedoncomprehensiveanalysisofgenerallayoutofpipingsystems;coldinstallationofsteampipewithparticularattentionreservedforcompensationofthermalexpansiondisplacementandorientation.C.supportsystemsshouldberationaltowithstandpipeloads,staticloadandincidentalload;reasonablepipingdisplacement;guaranteedundervariousconditions,stressarewithintheallowedrange.Strength,stiffness,andmeetrequirementstopreventvibrationandsoothingwater,withoutaffectingtheadjacentequipmentmaintenanceandotherpipinginstallationandexpansion.D.equipmentconnectedtotheinterfacetomeetpipelinethrust(torque)limitrequirements;increasethestabilityofpipingsystemstopreventpipeline...Tubewallthickness(mm)2-34-67-10weldformnoslopemouthweldstrengtheningheighth(mm)1-1.51.5-2weldwidthb(mm)5-67-6hasslopemouthweldstrengtheningheighth(mm)1.5-22weldwidthb(mm)coverhadeachedgeslopemouthabout2mmargonarcweldingweldstrengtheningsurfaceheightandwidthtubewallthickness(mm)2--33--45--6weldformweldstrengtheningheighth(mm)1-1.51.5-22-2.5widthb(mm)&C2(試分析如圖3所示的組合邏輯電路。(15分)1).寫(xiě)出輸出邏輯表達(dá)式;2).化為最簡(jiǎn)與或式;3).列出真值表;4).說(shuō)明邏輯功能。3.七、分析如下時(shí)序電路的邏輯功能，寫(xiě)出電路的驅(qū)動(dòng)方程、狀態(tài)方程和輸出方程，畫(huà)出電路的狀態(tài)轉(zhuǎn)換圖。(,,)圖(37)圖(37)4(74161組成的電路如題37圖所示，分析電路，并回答以下問(wèn)題(1)畫(huà)出電路的狀態(tài)轉(zhuǎn)換圖(QQQQ);3210(2)說(shuō)出電路的功能。(74161的功能見(jiàn)表)六(設(shè)計(jì)題:(30分)1(要求用與非門(mén)設(shè)計(jì)一個(gè)三人表決用的組合邏輯電路圖，只要有2票或3票同意，表決就通過(guò)(要求有真值表等)。andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirectionyouwant.7.3.14.hangersinstallation7.3.14.1hangerlayouta.acleardesignofhangershouldbeinstalledstrictlyinaccordancewiththedrawingsanddesignsshallnotbeinstalledwrong,missing,etc.B.ownarrangementofpipingsupportandhangersetandselectionshouldbebasedoncomprehensiveanalysisofgenerallayoutofpipingsystems;coldinstallationofsteampipewithparticularattentionreservedforcompensationofthermalexpansiondisplacementandorientation.C.supportsystemsshouldberationaltowithstandpipeloads,staticloadandincidentalload;reasonablepipingdisplacement;guaranteedundervariousconditions,stressarewithintheallowedrange.Strength,stiffness,andmeetrequirementstopreventvibrationandsoothingwater,withoutaffectingtheadjacentequipmentmaintenanceandotherpipinginstallationandexpansion.D.equipmentconnectedtotheinterfacetomeetpipelinethrust(torque)limitrequirements;increasethestabilityofpipingsystemstopreventpipeline...Tubewallthickness(mm)2-34-67-10weldformnoslopemouthweldstrengtheningheighth(mm)1-1.51.5-2weldwidthb(mm)5-67-6hasslopemouthweldstrengtheningheighth(mm)1.5-22weldwidthb(mm)coverhadeachedgeslopemouthabout2mmargonarcweldingweldstrengtheningsurfaceheightandwidthtubewallthickness(mm)2--33--45--6weldformweldstrengtheningheighth(mm)1-1.51.5-22-2.5widthb(mm)2.試用JK觸發(fā)器和門(mén)電路設(shè)計(jì)一個(gè)十三進(jìn)制的計(jì)數(shù)器,并檢查設(shè)計(jì)的電路能否自啟動(dòng)。(14分)答案:一(填空題1(真值表、邏輯圖、邏輯表達(dá)式、卡諾圖;2(0;4(高5(與、或、非6(最高7(同步型、主從型;9(TTL、CMOS;111(功能擴(kuò)展電路、功能綜合電路;12(半13(本位(低位)，低位進(jìn)位14(該時(shí)刻輸入變量的取值，該時(shí)刻電路所處的狀態(tài)15(同步計(jì)數(shù)器，異步計(jì)數(shù)器16(RS觸發(fā)器，T觸發(fā)器，JK觸發(fā)器，Tˊ觸發(fā)器，D觸發(fā)器17(反饋歸零法，預(yù)置數(shù)法，進(jìn)位輸出置最小數(shù)法，一18(兩19(多諧振蕩器20(J=K=Tn21(222(RS=0五(分析題20分)1((1、)寫(xiě)出表達(dá)式Y(jié),AB，BC，CAY,CAY,ABY,BC312(2)、畫(huà)出真值表ABCY0000001001000111100010111101(3)、當(dāng)輸入A、B、C中有2個(gè)或3個(gè)為1時(shí)，輸出Y為1，否則輸出Y為0。所以這1111個(gè)電路實(shí)際上是一種3人表決用的組合電路:只要有2票或3票同意，表決就通過(guò)。2((1)邏輯表達(dá)式andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirectionyouwant.7.3.14.hangersinstallation7.3.14.1hangerlayouta.acleardesignofhangershouldbeinstalledstrictlyinaccordancewiththedrawingsanddesignsshallnotbeinstalledwrong,missing,etc.B.ownarrangementofpipingsupportandhangersetandselectionshouldbebasedoncomprehensiveanalysisofgenerallayoutofpipingsystems;coldinstallationofsteampipewithparticularattentionreservedforcompensationofthermalexpansiondisplacementandorientation.C.supportsystemsshouldberationaltowithstandpipeloads,staticloadandincidentalload;reasonablepipingdisplacement;guaranteedundervariousconditions,stressarewithintheallowedrange.Strength,stiffness,andmeetrequirementstopreventvibrationandsoothingwater,withoutaffectingtheadjacentequipmentmaintenanceandotherpipinginstallationandexpansion.D.equipmentconnectedtotheinterfacetomeetpipelinethrust(torque)limitrequirements;increasethestabilityofpipingsystemstopreventpipeline...Tubewallthickness(mm)2-34-67-10weldformnoslopemouthweldstrengtheningheighth(mm)1-1.51.5-2weldwidthb(mm)5-67-6hasslopemouthweldstrengtheningheighth(mm)1.5-22weldwidthb(mm)coverhadeachedgeslopemouthabout2mmargonarcweldingweldstrengtheningsurfaceheightandwidthtubewallthickness(mm)2--33--45--6weldformweldstrengtheningheighth(mm)1-1.51.5-22-2.5widthb(mm)Y,AB，A,BCYABCY()12100000Y,A,B,C200110(2)最簡(jiǎn)與或式:Y,AB，AC，BC01010101101Y,ABC，ABC，ABC，ABC210010(3)真值表(右圖)。10101(4)邏輯功能為:全加器。110013.,)據(jù)邏輯圖寫(xiě)出電路的驅(qū)動(dòng)方程:11111T,1T,Q010T,QQT,QQQ2013012,)求出狀態(tài)方程:1n，Q,Q001n，Q,QQ，QQ101011n，Q,QQQ，QQQ20120121n，Q,QQQQ，QQQQ301230123,)寫(xiě)出輸出方程:C,QQQQ0123,)列出狀態(tài)轉(zhuǎn)換表或狀態(tài)轉(zhuǎn)換圖或時(shí)序圖:5)從以上看出，每經(jīng)過(guò)16個(gè)時(shí)鐘信號(hào)以后電路的狀態(tài)循環(huán)變化一次;同時(shí)，每經(jīng)過(guò)16個(gè)時(shí)鐘脈沖作用后輸出端C輸出一個(gè)脈沖，所以，這是一個(gè)十六進(jìn)制記數(shù)器，C端的輸出就是進(jìn)位。CPQQQQ等效十進(jìn)制數(shù)C3210000000010001102001020??15111115016000000andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirectionyouwant.7.3.14.hangersinstallation7.3.14.1hangerlayouta.acleardesignofhangershouldbeinstalledstrictlyinaccordancewiththedrawingsanddesignsshallnotbeinstalledwrong,missing,etc.B.ownarrangementofpipingsupportandhangersetandselectionshouldbebasedoncomprehensiveanalysisofgenerallayoutofpipingsystems;coldinstallationofsteampipewithparticularattentionreservedforcompensationofthermalexpansiondisplacementandorientation.C.supportsystemsshouldberationaltowithstandpipeloads,staticloadandincidentalload;reasonablepipingdisplacement;guaranteedundervariousconditions,stressarewithintheallowedrange.Strength,stiffness,andmeetrequirementstopreventvibrationandsoothingwater,withoutaffectingtheadjacentequipmentmaintenanceandotherpipinginstallationandexpansion.D.equipmentconnectedtotheinterfacetomeetpipelinethrust(torque)limitrequirements;increasethestabilityofpipingsystemstopreventpipeline...Tubewallthickness(mm)2-34-67-10weldformnoslopemouthweldstrengtheningheighth(mm)1-1.51.5-2weldwidthb(mm)5-67-6hasslopemouthweldstrengtheningheighth(mm)1.5-22weldwidthb(mm)coverhadeachedgeslopemouthabout2mmargonarcweldingweldstrengtheningsurfaceheightandwidthtubewallthickness(mm)2--33--45--6weldformweldstrengtheningheighth(mm)1-1.51.5-22-2.5widthb(mm)解:(1)狀態(tài)轉(zhuǎn)換表:nnnnn+1n+1n+1n+1QQQQQQQQ32103210000000010001001000100011001101000100010101010110011001110111100010001001100110101010101110110000狀態(tài)轉(zhuǎn)換圖:QQQQ3210000000010010001101001011101010011000011101100101andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirectionyouwant.7.3.14.hangersinstallation7.3.14.1hangerlayouta.acleardesignofhangershouldbeinstalledstrictlyinaccordancewiththedrawingsanddesignsshallnotbeinstalledwrong,missing,etc.B.ownarrangementofpipingsupportandhangersetandselectionshouldbebasedoncomprehensiveanalysisofgenerallayoutofpipingsystems;coldinstallationofsteampipewithparticularattentionreservedforcompensationofthermalexpansiondisplacementandorientation.C.supportsystemsshouldberationaltowithstandpipeloads,staticloadandincidentalload;reasonablepipingdisplacement;guaranteedundervariousconditions,stressarewithintheallowedrange.Strength,stiffness,andmeetrequirementstopreventvibrationandsoothingwater,withoutaffectingtheadjacentequipmentmaintenanceandotherpipinginstallationandexpansion.D.equipmentconnectedtotheinterfacetomeetpipelinethrust(torque)limitrequirements;increasethestabilityofpipingsystemstopreventpipeline...Tubewallthickness(mm)2-34-67-10weldformnoslopemouthweldstrengtheningheighth(mm)1-1.51.5-2weldwidthb(mm)5-67-6hasslopemouthweldstrengtheningheighth(mm)1.5-22weldwidthb(mm)coverhadeachedgeslopemouthabout2mmargonarcweldingweldstrengtheningsurfaceheightandwidthtubewallthickness(mm)2--33--45--6weldformweldstrengtheningheighth(mm)1-1.51.5-22-2.5widthb(mm)(2)功能:11進(jìn)制計(jì)數(shù)器。從0000開(kāi)始計(jì)數(shù)，當(dāng)QQQQ為1011時(shí)，通過(guò)與非門(mén)異步3210清零，完成一個(gè)計(jì)數(shù)周期。六(設(shè)計(jì)題:1.(1)、畫(huà)出真值表ABCY00000010010001111000101111011111(2)寫(xiě)出表達(dá)式Y(jié),AB，BC，CAA&(3)畫(huà)出邏輯圖Y&&B&C2.解:根據(jù)題意，得狀態(tài)轉(zhuǎn)換圖如下:andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcracks,rustandotherdefects.5)aftercompletionofthetestandcontroldrawingnumberonebyone,byseriesbaled.Coloralloysteelparts,thepartsmarkinginstallationlocationandrotationaboutthedirectionyouwant.7.3.14.hangersinstallation7.3.14.1hangerlayouta.acleardesignofhangershouldbeinstalledstrictlyinaccordancewiththedrawingsanddesignsshallnotbeinstalledwrong,missing,etc.B.ownarrangementofpipingsupportandhangersetandselectionshouldbebasedoncomprehensiveanalysisofgenerallayoutofpipingsystems;coldinstallationofsteampipewithparticularattentionreservedforcompensationofthermalexpansiondisplacementandorientation.C.supportsystemsshouldberationaltowithstandpipeloads,staticloadandincidentalload;reasonablepipingdisplacement;guaranteedundervariousconditions,stressarewithintheallowedrange.Strength,stiffness,andmeetrequirementstopreventvibrationandsoothingwater,withoutaffectingtheadjacentequipmentmaintenanceandotherpipinginstallationandexpansion.D.equipmentconnectedtotheinterfacetomeetpipelinethrust(torque)limitrequirements;increasethestabilityofpipingsystemstopreventpipeline...Tubewallthickness(mm)2-34-67-10weldformnoslopemouthweldstrengtheningheighth(mm)1-1.51.5-2weldwidthb(mm)5-67-6hasslopemouthweldstrengtheningheighth(mm)1.5-22weldwidthb(mm)coverhadeachedgeslopemouthabout2mmargonarcweldingweldstrengtheningsurfaceheightandwidthtubewallthickness(mm)2--33--45--6weldformweldstrengtheningheighth(mm)1-1.51.5-22-2.5widthb(mm)所以:能自啟動(dòng)。因?yàn)?圖52(試用3線(xiàn)—8線(xiàn)譯碼器74LS138和門(mén)電路實(shí)現(xiàn)下列函數(shù)。(8分)AZ(A、B、C)=AB+CY0A2Y1A1Y2A074LS138Y3Y4STAY5STBY6STCY7CBAA解:Z(A、B、C)=AB+C=AB(C+)+C(B+)YCBAA0=ABC+AB+BC+CAA2Y1AB1Y2A0=m+m+m+m1367C&74LS138Y3ZY4STA“1”m,m,m,m=(4分)1367Y5STBY6STCY7andperformancetestcopiesoftherecord.Ifnecessary,reviewshouldbecarriedout;4)forspringhangers(includedsimplespring,hangersandconstantsupporthangers)itshouldalsoberecognizedassettingandlockingofloads.5)checkthesurfacequality,foldedlayeringandwithoutcrac