[信息与通信]Lesson 03 Resistor Capacitor Inductor电子技术专业英语教程

1、lesson 3 resistor capacitor inductor电子技术专业英语教程冯新宇 主编电子工业出版社电子工业出版社 unit 2 semiconductor device2021-10-15电子技术专业英语教程2 lesson 3 resistor capacitor inductor backgrounds text tour language in use vocabulary structure reading/writing techniques2021-10-15电子技术专业英语教程3 terminology resistor capacitor inductor

2、four-band resistors inductance formulaebackgrounds2021-10-15电子技术专业英语教程4terminology 2021-10-15电子技术专业英语教程5 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 。 resistor resistance may be thought of as an opposition to current flow; the higher the resistance the lower the current that will flow .2021-10-15电子技术专业英语教程6 the

3、 resistance of an electrical conductor depends on 4 factors, these being: (a) the length of the conductor. resistance, r, is directly proportional to length, l, of a conductor, i.e. rl. (b) the cross-sectional area of the conductor. resistance, r, is inversely proportional to cross-sectional area, a

4、, of a conductor, i.e. r1/a. (c) the type of material. (d) the temperature of the material. resistor2021-10-15电子技术专业英语教程7resistor 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rl （b）导体横截面积。电阻r反比于导体的横截面积a，即r1/a （c）材料类型 （d）材料温度。 2021-10-15电子技术专业英语教程8 the main types of the capacitor include: variable air, mica,

5、paper, ceramic, plastic, titanium oxide and electrolytic. 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 2021-10-15电子技术专业英语教程9 an iron-cored inductor is often called a choke since, when used in a.c. circuits, it has a hoking effect, limiting the current flowing through it. 一个有铁芯的电感器我们通常

6、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 2021-10-15电子技术专业英语教程10four-band resistors four-band identification is the most commonly used color-coding scheme on resistors. it consists of four colored bands that are painted around the body of the resistor. the first two bands encode the first two

7、 significant digits of the resistance value, the third is a power-of-ten multiplier or number-of-zeroes, and the fourth is the tolerance accuracy, or acceptable error, of the value. the first three bands are equally spaced along the resistor; the spacing to the fourth band is wider. sometimes a fift

8、h band identifies the thermal coefficient, but this must be distinguished from the true 5-color system, with 3 significant digits.2021-10-15电子技术专业英语教程112021-10-15电子技术专业英语教程12 for example, green-blue-yellow-red is 56104 = 560 k 2%. an easier description can be as followed: the first band, green, has

9、a value of 5 and the second band, blue, has a value of 6, and is counted as 56. the third band, yellow, has a value of 104, which adds four 0s to the end, creating 560,000 at 2% tolerance accuracy. 560,000 changes to 560 k 2% (as a kilo- is 103).2021-10-15电子技术专业英语教程13inductance formulae the table be

10、low lists some common formulae for calculating the theoretical inductance of several inductor constructions 2021-10-15电子技术专业英语教程14constructionformuladimensionscylindrical coill = inductance in henries (h) 0 = permeability of free space = 4 10-7 h/m k = nagaoka coefficient2 n = number of turns a = ar

11、ea of cross-section of the coil in square metres (m2) l = length of coil in metres (m)straight wire conductorl = inductance (h) l = length of conductor (m) d = diameter of conductor (m)l = inductance (nh) l = length of conductor (in) d = diameter of conductor (in)2021-10-15电子技术专业英语教程15constructionfo

12、rmuladimensionsshort air-corecylindrical coill = inductance (h) r = outer radius of coil (in) l = length of coil (in) n = number of turnsmultilayer air-core coill = inductance (h) r = mean radius of coil (in) l = physical length of coil winding (in) n = number of turns d = depth of coil (outer radiu

13、s minus inner radius) (in)2021-10-15电子技术专业英语教程16constructionformuladimensionsflat spiral air-core coill = inductance (h) r = mean radius of coil (m) n = number of turns d = depth of coil (outer radius minus inner radius) (m)l = inductance (h) r = mean radius of coil (in) n = number of turns d = dept

14、h of coil (outer radius minus inner radius) (in)toroidal core (circular cross-section)l = inductance (h) 0 = permeability of free space = 4 10-7 h/m r = relative permeability of core material n = number of turns r = radius of coil winding (m) d = overall diameter of toroid (m)2021-10-15电子技术专业英语教程17

15、outline brief introduction (para.1) resistor (para.2, 3, 4, 5,6 ) capacitor (para.7, 8, 9, 10, 11, 12, 13) inductor (para.14, 15, 16) text tour2021-10-15电子技术专业英语教程18 a means of controlling the currents and voltages present in electronic circuits. an opposition to current flow resistor2021-10-15电子技术专

16、业英语教程19 a device for storing electric charge deposite and extracte chargecapacitor2021-10-15电子技术专业英语教程20 coil of wire an iron-cored inductor is often called a choke inductor2021-10-15电子技术专业英语教程21 vocabulary component ，coil ，amplifier structurelanguage in use2021-10-15电子技术专业英语教程22vocabulary2021-10-15

17、电子技术专业英语教程23 a constituent part or aspect of something more complex.组成；成分 any electrical device .元件 forming or functioning as a part or aspect; constituent .成分的， 分量的 component in dictionary 2021-10-15电子技术专业英语教程24component in text1. this section introduces several of the most common types of electron

18、ic component, including resistors, capacitors and inductors.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。 2. these are often referred to as passive components as they cannot, by themselves, generate voltage or current.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。 2021-10-15电子技术专业英语教程25 component index成份指数 reactive component无功分量 act

19、ive component有功分量 component in use 2021-10-15电子技术专业英语教程26 to wind or gather (ropes, hair, etc) into loops or (of rope, hair, etc) to be formed in such loops .将卷盘成圈或螺旋形 a single loop of such a series线圈 an arrangement of pipes in a spiral or loop, as in a condenser旋管coil in dictionary 2021-10-15电子技术专业

20、英语教程27coil in text the basic form of an inductor is simply a coil of wire.电感的基本形式是简单的一匝线圈。2021-10-15电子技术专业英语教程28 current through primary coil induces current in secondary coil.通过原线圈在次级线圈中产生电流。 coil spring 弹簧 cooling coil 冷却盘管 primary coil 一次线圈 coil in use 2021-10-15电子技术专业英语教程29 an electronic device

21、used to increase the strength of the signal fed into it 放大器 such a device used for the amplification of audio frequency signals in a radio, etc 扩音器 a person or thing that amplifies 扩大的人(物) amplifier in dictionary 2021-10-15电子技术专业英语教程30 an understanding of the characteristics and application of passi

22、ve components is an essential prerequisite to understanding the operation of the circuits used in amplifiers, oscillators, filters and power supplies. 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。amplifier in text2021-10-15电子技术专业英语教程31 power amplifier 功率放大器 differential amplifier 差动放大器 operational amplifier 运算放大器 magnetic amplifier 磁放大器