电气专业毕业设计中英文对照翻译

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1、河南理工大学毕业设计外文翻译本科毕业设计（论文）中英文对照翻译院（系部）电气学院专业名称电气工程及其自动化年级班级学生姓名指导老师22河南理工大学毕业设计外文翻译Chapter3DigitalElectronics3.1IntroductionAcircuitthatemploysanumericalsignalinitsoperationisclassifiedasadigitalcircuit.Computers,pocketcalculators,digitalinstruments,andnumericalcontrol(NC)equipmentarecommona

2、pplicationsofdigitalcircuits.Practicallyunlimitedquantitiesofdigitalinformationcanbeprocessedinshortperiodsoftimeelectronically.Withoperationalspeedofprimeimportanceinelectronicstoday,digitalcircuitsareusedmorefrequently.Inthischapter,digitalcircuitapplicationsarediscussed.Therearemanytype

3、sofdigitalcircuitsthathaveapplicationsinelectronics,includinglogiccircuits,flip-flopcircuits,countingcircuits,andmanyothers.Thefirstsectionsofthisunitdiscussthenumbersystemsthatarebasictodigitalcircuitunderstanding.Theremainderofthechapterintroducessomeofthetypesofdigitalcircuitsandexplain

4、sBooleanalgebraasitisappliedtologiccircuits.3.2DigitalNumberSystemsThemostcommonnumbersystemusedtodayisthedecimalsystem,inwhich10digitsareusedforcounting.Thenumberofdigitsinthesystemiscalleditsbase(orradix).Thedecimalsystem，therefore，hasabaseof10.Numberingsystemshaveaplacevalue，whichrefers

5、totheplacementofadigitwithrespecttoothersinthecountingprocess.Thelargestdigitthatcanbeusedinaspecificplaceorlocationisdeterminedbythebaseofthesystem.Inthedecimalsystemthefirstpositiontotheleftofthedecimalpointiscalledtheunitsplace.Anydigitfrom0to9canbeusedinthisplace.Whennumbervaluesgreate

6、rthan9areused,theymustbeexpressedwithtwoormoreplaces.Thenextpositiontotheleftoftheunitsplaceinadecimalsystemisthetensplace.Thenumber99isthelargestdigitalvaluethatcanbeexpressedbytwoplacesinthedecimalsystem.Eachplaceaddedtotheleftextendsthenumbersystembyapowerof10.Anynumbercanbeexpressedasa

7、sumofweightedplacevalues.Thedecimalnumber2583,forexample,isexpressedas(2×1000)+(5×100)+(8×10)+(3×1).Thedecimalnumbersystemiscommonlyusedinourdailylives.Electronically,however,itisratherdifficulttouse.Eachdigitofabase10systemwouldrequirea22河南理工大学毕业设计外文翻译specifi