电子专业英语(一)

1、Basic Semiconductor Crystal Structure1. DiodeWarming upRead the words and expressions.structure结构diode二极管electronic component 子元件electrode 极semiconductor半 体anode 正极 , 阳极cathode 极 , 阴极be comprised of由 成 , 由构成emit 出current 流light-emitting diode (LED) 光二极管ReadingA diode is a specialized electronic comp

2、onent with two electrodes called the anode and the cathode . Most diodes are made with semiconductor materials such as silicon, germanium, or selenium.There is one form of diodes which commonly used inelectronic and computer equipment, emit s visible light infrared transmission (IR) energy when curr

3、ent passes through it. Such a device is the familiar light-emitting diode ( LED) .orNotes:1. Most diodesare made with semiconductormaterialssuchas silicon, germanium, or selenium .大部分二极管由硅、锗或硒等半导体材料制成。Silicon?s?l?k?n硅,硅元素 ; germanium d?:?me?ni?m锗,锗元素 ;seleniums?li:ni?m 硒,硒元素2. There is one form of d

4、iodes which commonly used inelectronic and computer equipment, emits visible light infrared transmission (IR) energy when current passesorthrough it. Such a device is the familiar light-emittingdiode (LED) 有一类二极管能在电流通过时发出可见光或红外线能量，它普遍应用于电子和计算机设备中这就是我们所熟知的发光二极管LED2. TriodeA triode is an electronic am

5、plification device having three active electrodes. The term most commonly applies to a vacuum tube (or valve in British English) with threeelements: the filament or cathode, the grid, and the plate or anode. The triode vacuum tube is the first electronic amplification device.Warming upRead the words

6、 and expressions.3. silicon-controlled rectifierWarming upRead the words and expressions.silicon-controlled rectifier可控硅整流器Layer层Device装置Unidirectional 向的， 向性的Bidirectional双向的，双向性的be triggered触 conduct传导opposed to与相反，而不是direction方向positive正离子negative负离子gate electrode门电极ReadingA silicon-controlled re

7、ctifier (or semiconductor-controlled rectifier) is a four-layer solid state current controlling device.SCRs are unidirectional devices (i.e. can conduct current only in one direction) as opposed to TRIACs which are bidirectional (i.e. current can flow through them ineither direction). SCRscan be tri

8、ggered normally only by currents going into the gate as opposed to TRIACs whichcan be triggered normally by either a positive or a negative current applied to its gate electrode.Notes:1.SCRs are unidirectional devices (i.e. can conductcurrent only in one direction) as opposed to TRIACs whichare bidi

9、rectional (i.e. current can flow through them ineither direction)。可控硅为单向传导装置（即仅可单向传导电流），而与之相反， 三端双向可控硅（TRIACS）则为双向传导装置（即可双向传导电流）Feedback and Review1） Read and match（ 1）Diode（2）LED（3）TriodeSCR（ 4）2) Answer the questions:1. How many electrodes does a diode have? What are they?2. What is LED?3.4. Can SCRsbe triggered by either a positive or a negative current?3) True or false:1.All of the diodes can emit visible light or infrared transmission (IR) energy.2.3. SCRs are unidirectional devices, whill TRIACs are