Lesson 03 Resistor Capacitor Inductor電子技術(shù)專業(yè)英語教程

Lesson3ResistorCapacitorInductor《電子技術(shù)專業(yè)英語教程》馮新宇主編電子工業(yè)出版社

Unit2

Semiconductordevice6/26/20231Lesson3ResistorCapacitorInductor

BackgroundsTexttour

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

6/26/20234電阻可以被認(rèn)為對電流具有一種阻礙作用，電阻越高所流過的電流越低

。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導(dǎo)體的電阻依賴以下四個因素：（a）導(dǎo)體長度。電阻R正比于導(dǎo)體長度l，即R∝l（b）導(dǎo)體橫截面積。電阻R反比于導(dǎo)體的橫截面積a，即R∝1/a（c）材料類型（d）材料溫度。6/26/20237Themaintypesofthecapacitorinclude:variableair,mica,paper,ceramic,plastic,titaniumoxideandelectrolytic.電容的主要類型包括：可變間隙電容，云母電容，紙電容，陶瓷電容，塑料電容，二氧化鈦電容以及電解質(zhì)電容。Capacitor

6/26/20238Aniron-coredinductorisoftencalledachokesince,whenusedina.c.circuits,ithasahokingeffect,limitingthecurrentflowingthroughit.一個有鐵芯的電感器我們通常把它稱之為扼流圈，這主要是因為在交流電路中它具有阻塞效應(yīng)，可以限制流過它的電流。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. 組成；成分anyelectricaldevice. 元件formingorfunctioningasapartoraspect;constituent. 成分的，分量的

componentindictionary

6/26/202323componentintextThissectionintroducesseveralofthemostcommontypesofelectroniccomponent,includingresistors,capacitorsandinductors.本節(jié)介紹幾種最常用的電子元件類型，包括電阻、電容和電感。

Theseareoftenreferredtoaspassivecomponentsastheycannot,bythemselves,generatevoltageorcurrent.它們經(jīng)常被看作是無源元件，因為它們本身不能產(chǎn)生電壓或電流。6/26/202324componentindex成份指數(shù)

reactivecomponent無功分量activecomponent有功分量

componentinuse

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

coilindictionary

6/26/202326coilintext

Thebasicformofaninductorissimplyacoilofwire..電感的基本形式是簡單的一匝線圈。6/26/202327currentthroughprimarycoilinducescurrentinsecondarycoil.

通過原線圈在次級線圈中產(chǎn)生電流。

coilspring彈簧coolingcoil冷卻盤管primarycoil一次線圈

coilinuse

6/26/202328anelectronicdeviceusedtoincreasethestrengthofthesignalfedintoit放大器

suchadeviceusedfortheamplificationofaudiofrequencysignalsinaradio,etc擴(kuò)音器apersonorthingthatamplifies擴(kuò)大的人(物)

amplifierindictionary

6/26/202329Anunderstandingofthecharacteristicsandapplicationofpassivecomponentsisanessentialprerequisitetounderstandingtheoperationofthecircuitsusedinamplifiers,oscillators,filtersandpowersupplies.理解無源元件的特性和應(yīng)用是理解放大器、振蕩器、濾波器和電源工作原理的首要條件。amplifierintext6/26/202330poweramplifier功率放大器

differentialamplifier差動放大器operationalamplifier運算放大器magneticamplifier磁放大器amplifierinuse6/26/202331Structure6/26/202332Conventionalformsofresistorobeyastraightlinelawwhenvoltageisplottedagainstcurrentandthisallowsustouseresistorsasameansofconvertingcurrentintoaorrespondingvoltagedrop,andviceversa.當(dāng)電壓相對電流標(biāo)繪時電阻通常遵從線性規(guī)律形式，可以把電阻作為電流轉(zhuǎn)換成為相應(yīng)壓降的一種手段，反之亦然。在這個長句中，由and連接兩個句子構(gòu)成。前一句是一個when引導(dǎo)時間狀語從句，主句中resistor是主語，obey是謂語，astraightlinelaw是賓語，在從句中voltage是主語