Lesson 03 Resistor Capacitor Inductor电子技术专业英语教程

Lesson3ResistorCapacitorInductor《电子技术专业英语教程》冯新宇主编电子工业出版社

Unit2

Semiconductordevice6/26/20231Lesson3ResistorCapacitorInductor

BackgroundsTexttour

LanguageinuseVocabularyStructureReading/writingtechniques6/26/20232TerminologyResistorCapacitorInductorFour-bandresistorsInductanceformulaeBackgrounds6/26/20233Terminology

6/26/20234电阻可以被认为对电流具有一种阻碍作用，电阻越高所流过的电流越低

。ResistorResistancemaybethoughtofasanoppositiontocurrentflow;thehighertheresistancethelowerthecurrentthatwillflow.6/26/20235Theresistanceofanelectricalconductordependson4factors,thesebeing:(a)Thelengthoftheconductor.Resistance,R,isdirectlyproportionaltolength,l,ofaconductor,i.e.R∝l.(b)Thecross-sectionalareaoftheconductor.Resistance,R,isinverselyproportionaltocross-sectionalarea,a,ofaconductor,i.e.R∝1/a.(c)Thetypeofmaterial.(d)Thetemperatureofthematerial.

Resistor6/26/20236Resistor导体的电阻依赖以下四个因素：（a）导体长度。电阻R正比于导体长度l，即R∝l（b）导体横截面积。电阻R反比于导体的横截面积a，即R∝1/a（c）材料类型（d）材料温度。6/26/20237Themaintypesofthecapacitorinclude:variableair,mica,paper,ceramic,plastic,titaniumoxideandelectrolytic.电容的主要类型包括：可变间隙电容，云母电容，纸电容，陶瓷电容，塑料电容，二氧化钛电容以及电解质电容。Capacitor

6/26/20238Aniron-coredinductorisoftencalledachokesince,whenusedina.c.circuits,ithasahokingeffect,limitingthecurrentflowingthroughit.一个有铁芯的电感器我们通常把它称之为扼流圈，这主要是因为在交流电路中它具有阻塞效应，可以限制流过它的电流。Inductor

6/26/20239Four-bandresistors

Four-bandidentificationisthemostcommonlyusedcolor-codingschemeonresistors.Itconsistsoffourcoloredbandsthatarepaintedaroundthebodyoftheresistor.Thefirsttwobandsencodethefirsttwosignificantdigitsoftheresistancevalue,thethirdisapower-of-tenmultiplierornumber-of-zeroes,andthefourthisthetoleranceaccuracy,oracceptableerror,ofthevalue.Thefirstthreebandsareequallyspacedalongtheresistor;thespacingtothefourthbandiswider.Sometimesafifthbandidentifiesthethermalcoefficient,butthismustbedistinguishedfromthetrue5-colorsystem,with3significantdigits.6/26/2023106/26/202311Forexample,green-blue-yellow-redis56×104

Ω=560

kΩ

±

2%.Aneasierdescriptioncanbeasfollowed:thefirstband,green,hasavalueof5andthesecondband,blue,hasavalueof6,andiscountedas56.Thethirdband,yellow,hasavalueof104,whichaddsfour0'stotheend,creating560,000Ωat±2%toleranceaccuracy.560,000Ωchangesto560kΩ±2%(asakilo-is103).6/26/202312Inductanceformulae

Thetablebelowlistssomecommonformulaeforcalculatingthetheoreticalinductanceofseveralinductorconstructions

6/26/2023136/26/2023146/26/2023156/26/202316Outlinebriefintroduction(para.1)Resistor(para.2,3,4,5,6)Capacitor(para.7,8,9,10,11,12,13)Inductor(para.14,15,16)Texttour6/26/202317Ameansofcontrollingthecurrentsandvoltagespresentinelectroniccircuits.Anoppositiontocurrentflow

Resistor6/26/202318AdeviceforstoringelectricchargedepositeandextractechargeCapacitor6/26/202319coilofwireAniron-coredinductorisoftencalledachoke

Inductor6/26/202320Vocabulary

component，coil，amplifierStructureLanguageinuse6/26/202321Vocabulary6/26/202322aconstituentpartoraspectofsomethingmorecomplex. 组成；成分anyelectricaldevice. 元件formingorfunctioningasapartoraspect;constituent. 成分的，分量的

componentindictionary

6/26/202323componentintextThissectionintroducesseveralofthemostcommontypesofelectroniccomponent,includingresistors,capacitorsandinductors.本节介绍几种最常用的电子元件类型，包括电阻、电容和电感。

Theseareoftenreferredtoaspassivecomponentsastheycannot,bythemselves,generatevoltageorcurrent.它们经常被看作是无源元件，因为它们本身不能产生电压或电流。6/26/202324componentindex成份指数

reactivecomponent无功分量activecomponent有功分量

componentinuse

6/26/202325towindorgather(ropes,hair,etc)intoloopsor(ofrope,hair,etc)tobeformedinsuchloops. 将…卷[盘]成圈或螺旋形asingleloopofsuchaseries线圈anarrangementofpipesinaspiralorloop,asinacondenser旋管

coilindictionary

6/26/202326coilintext

Thebasicformofaninductorissimplyacoilofwire..电感的基本形式是简单的一匝线圈。6/26/202327currentthroughprimarycoilinducescurrentinsecondarycoil.

通过原线圈在次级线圈中产生电流。

coilspring弹簧coolingcoil冷却盘管primarycoil一次线圈

coilinuse

6/26/202328anelectronicdeviceusedtoincreasethestrengthofthesignalfedintoit放大器

suchadeviceusedfortheamplificationofaudiofrequencysignalsinaradio,etc扩音器apersonorthingthatamplifies扩大的人(物)

amplifierindictionary

6/26/202329Anunderstandingofthecharacteristicsandapplicationofpassivecomponentsisanessentialprerequisitetounderstandingtheoperationofthecircuitsusedinamplifiers,oscillators,filtersandpowersupplies.理解无源元件的特性和应用是理解放大器、振荡器、滤波器和电源工作原理的首要条件。amplifierintext6/26/202330poweramplifier功率放大器

differentialamplifier差动放大器operationalamplifier运算放大器magneticamplifier磁放大器amplifierinuse6/26/202331Structure6/26/202332Conventionalformsofresistorobeyastraightlinelawwhenvoltageisplottedagainstcurrentandthisallowsustouseresistorsasameansofconvertingcurrentintoaorrespondingvoltagedrop,andviceversa.当电压相对电流标绘时电阻通常遵从线性规律形式，可以把电阻作为电流转换成为相应压降的一种手段，反之亦然。在这个长句中，由and连接两个句子构成。前一句是一个when引导时间状语从句，主句中resistor是主语，obey是谓语，astraightlinelaw是宾语，在从句中voltage是主语