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1、毕业设计说明书(毕业实践任务书)43毕业设计说明书(毕业实践任务书)课题名称电梯自动控制模型课题需要完成的任务：1.根据技术指标进行可行性方案分析及方案论述。2.硬件的框图及电路设计。3.传感器、显示器件、各主要器件、单元电路等的选用方案，性能分析及功能介绍。4.设计硬件电路的电路图。5.软件部分流程图及相关程序设计。6.毕业设计小结。课题计划：2.27～3.10查资料，进行初步方案设计。3.11～3.18设计最佳方案；设计硬件电路，。3.19～4.10编制程序，写毕业论文。4.11～4.20修改、完善毕业论文
2、，并做答辩准备。计划答辩时间：4.22电子信息技术系（部、分院）2007年4月18日43无锡职业技术学院毕业设计说明书(毕业实践调研报告)43无锡职业技术学院毕业设计说明书(英文翻译)英文DiodecharacteristicandapplicationInallelectroniccircuit,allmustusenearlytothesemiconductordiode,itisplayingthevitalroleinmanyelectriccircuits,itisbornoneofearliests
3、emiconductordevices,itsapplicationextremelyisalsowidespread.43无锡职业技术学院毕业设计说明书(英文翻译)DiodeprincipleofworkThecrystaldiodeisthep-nknotwhichformsbythepsemiconductorandthensemiconductor,formsthespacechargelevelinitscontactsurfaceplacetwoside,andconstructsfromconst
4、ructstheelectricfield.Whendoesnothavetheexternalvoltage,becausep-ntiesthediffusioncurrentwhichtwosideloadscurrentsconcentrationdifferencecausesandfromconstructsthedriftingelectriccurrentwhichtheelectricfieldcausestobeequalbutisattheelectricequilibriumconditi
5、on.Whentheoutsidehastheforwardvoltagebias,theoutsideelectricfieldandfromconstructedtheelectricfieldtodampmutuallydisappearsthefunctiontocausethecurrentcarrierthediffusioncurrentincreasetocausetotheelectriccurrent.Whentheoutsidehasthereversevoltagebias,theout
6、sideelectricfieldandfromconstructstheelectricfieldfurthertostrengthen,formsinthecertainlyreversevoltagescopereversesaturationcurrentI0whichhasnothingtodowithwiththereversebiasvoltagevalue.Whensur-reversevoltageashighascertaindegree,p-ntiesinthespacechargelev
7、eltheelectric-fieldintensitytoachievethemarginalvalueproducesthecurrentcarriertomultiplytheprocess,producesthemassiveelectron-holepairs,hasproducedthevalueverybigreversestrikingcurrent,iscalledthediodetopenetratethephenomenon.DiodetypeThediodetypehasverymuch
8、,accordingtosemiconductingmaterialwhichuses,maydivideintothegermaniumdiode(GETube)andsilicondiode(Sitube).Accordingtoitsdifferentuse,maydivideintothedetectordiode,therectificationdiode,thezenerd
