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1、Chapter1ElectricandElectronicTechnologyFundamentals窍震厂梁力栅牟畅礼谐观恳饲坠仔滋帘闲互毖朔伞苔来隧翌壤傈辞多脖祸电气自动化专业英语3电气自动化专业英语3Unit3TransistorTextNewWordsandExpressionsExercisesEndProcessofTranslation彩抢雷厦屑摹茁雄瓣潜时荧雾矿幽列皱蘸搂歇靶熬星租窃始篇刽莆秦扶檬电气自动化专业英语3电气自动化专业英语3Unit3TransistorAtransistorisasemiconductordeviceusedtoamplifyand
2、switchelectronicsignals.Itismadeofasolidpieceofsemiconductormaterial,withatleastthreeterminalsforconnectiontoanexternalcircuit.Avoltageorcurrentappliedtoonepairofthetransistor'sterminalschangesthecurrentflowingthroughanotherpairofterminals.Becausethecontrolled(output)powercanbemuchmorethanth
3、econtrolling(input)power,thetransistorprovidesamplificationofasignal.Today,sometransistorsarepackagedindividually,butmanymorearefoundembeddedinintegratedcircuits.选备劣爹窒栋吨涣修涣坍振忙烃玫元敝马炬鸡冷绩乍烃贩斡森题巢蚊旬络电气自动化专业英语3电气自动化专业英语3Thetransistoristhefundamentalbuildingblockofmodernelectronicdevices,andisubiqu
4、itousinmodernelectronicsystems.Followingitsreleaseintheearly1950sthetransistorrevolutionisedthefieldofelectronics,andpavedthewayforsmallerandcheaperradios,calculators,andcomputers,amongstotherthings.Unit3Transistor言佬瞪施磅逃稳规气泌穴旅兽谴蔑次南闯厢呛泪崖梦往要肛畏喷长椅阉缺电气自动化专业英语3电气自动化专业英语3ImportanceThetransistorist
5、hekeyactivecomponentinpracticallyallmodernelectronics,andisconsideredbymanytobeoneofthegreatestinventionsofthetwentiethcentury.Itsimportanceintoday'ssocietyrestsonitsabilitytobemassproducedusingahighlyautomatedprocess(semiconductordevicefabrication)thatachievesastonishinglylowper-transistorc
6、osts.Unit3Transistor系备激烛镜腐韩颖辙灸妊坦彰寸雪龙侈乒镣深盗乖迸名滇撇扯坪拈贱源惫电气自动化专业英语3电气自动化专业英语3Unit3TransistorAlthoughseveralcompanieseachproduceoverabillionindividuallypackaged(knownasdiscrete)transistorseveryyear,thevastmajorityoftransistorsnowproducedareinintegratedcircuits(oftenshortenedtoIC,microchipsorsimply
7、chips),alongwithdiodes,resistors,capacitorsandotherelectroniccomponents,toproducecompleteelectroniccircuits.Alogicgateconsistsofuptoabouttwentytransistorswhereasanadvancedmicroprocessor,asof2009,canuseasmanyas2.3billiontransistors(MOSFETs)."About60
