《电子专业英语教学课件作者高明辉第12章》由会员分享，可在线阅读，更多相关《电子专业英语教学课件作者高明辉第12章（12页珍藏版）》请在金锄头文库上搜索。
1、Warming-up I. Have you ever seen the instrument in the electronic Laboratory?,Unit 12 Oscilloscope,下一页,返回,II. Do you know the meaning of the folloming phrases? 1. trouble shouting 2. cathode一ray oscilloscope 3. deflection plates III. Talk about Current in Englash. And the following patterns you can
2、use. Do you know what the function of an oscilloscope is Could you tell me the different types of oscilloscopes Could you describe the size，weight and shape of an oscilloscope What are the main parts of the oscilloscope Could you explain the working principle of an oscilloscope,Unit 12 Oscilloscope,
3、上一页,下一页,返回,Text Comprehension Oscilloscope The cathode-ray oscilloscope is one of the tnosl itnporlanl electronic measuring inslrutnenls. It is widely used for research and developtnenl in the electronic industry，such as design work，trouble shooting, signal tnoniloring and production-line testing，an
4、d many other applications where the ob-servalion of an electrical wavefortn is desired. The heart of the oscilloscope is the cathode-ray tube which consists of the base，neck(in which an electron gun is included)，bulb and the face一plate( screen).The electron gun consists of a calh-ode，which etnils el
5、ectrons when it is healed，a control grid，an anode，which attracts the electron beam through it，and two sets of delleclion plates. One set of delleclion plates is used for moving the electron beam in horizontal direction. The other set is used to move the electron beam in vertical di-reckon. The beam，
6、starling from the cathode，passes Through the control grid and the anode，between the two sets of deflection plates，and strikes the face of the cathode-ray tube.,Unit 12 Oscilloscope,上一页,下一页,返回,Unit 12 Oscilloscope,上一页,下一页,返回,Most oscilloscopes are AC operated，weigh 40 pounds or more，and use a 5-inch
7、screen. For applications where small size，light weight and portability are highly desirable，transistorized oscilloscope are preferred over vacuum tube types. A transistorized oscilloscope weighs about ten poundsor more，operates from AC line or the batteries，and uses a 3-inch screen. Oscilloscopes ra
8、nge from the general purpose types to the special-purpose types. The former is suitable for practically any usual applications in servicing， cotntnunicalions，scientific or indus-trial work where the liequency of the signal observed does not exceed 500 kHz.,Unit 12 Oscilloscope,上一页,下一页,返回,Vocabulary
9、1. research n. 研究 2. signal n. 信号 3. application n. 应用 4. waveform n. 波形 5. base n. 底座 6. neck n. 颈 7. emit n. 发射 8. grid n. 栅极 9. anode n. 阳极 10. beam n. 光柱，光束 11. deflection n. 偏转 12. horizontal adj. 水平的 13. vertical n. 垂直的,Unit 12 Oscilloscope,上一页,下一页,返回,14. strike v. 打击 15. screen n. 荧光屏 16. tra
10、nsistorize v. 晶体管化的 17. suitable adj. 适合的，适宜的 Phrases and Expressions 1. cathode一ray 阴极射线 2. signal monitoring 信号监视 3. face-plate 面板 4. control grid 控制栅 5. deflection plate 偏转板,Unit 12 Oscilloscope,上一页,下一页,返回,Notes 1.and many other applications where the observation of an electrical wavcfortn is des
11、ired.句中where引导的是定语从句，修饰applicalions. 2.transistorized oscilloscopes arc preferred over vacuum tube types.这里 be preferred over意思是“比好”。 3. range from. . .to. . .意思是在某范围内变化。 4.gencral-purpose意为“一般用途的”。 5 .The former is suitable for practically any usual applications in servicing，这里servicing 意思是“检修”。,Un
12、it 12 Oscilloscope,上一页,下一页,返回,Comprehensive Exercise I. Choose the right answer from A，B，and C according to the text. 【】1 .The function of the oscilloscope is_ A. to measure voltage B. used in design work，trouble shouting and so on C. not mentioned 【】2. The heart of the oscilloscope is A. the cathod
13、e-ray tube B. screen C. electron gun 【】 3._ consists of the base，bulb and the face-plate. . . A. the electron gun B. oscilloscope C. the cathode-ray tube,Unit 12 Oscilloscope,上一页,下一页,返回,【】 4. Most oscilloscopes are AC operated，weigh 40 pounds or more,and uses a_screen. A .5一inch B. 3一inch C. 4一inch
14、【】 5. A transistorized oscilloscope weighs about ten pounds or more, operates form_ ,and uses a 3-inch screen. A. DC line B. AC line or the balleries C. power supply II. True or false. 口1 .The heart of the oscilloscope is the vacuum tube which consists of the base，neck，bulb and the face一plate. 口2. T
15、he oscilloscope can be used in production一line testing. 口3 .Most oscilloscopes are DC operated，weigh 40 pounds or more. 口4. The general purpose types of oscilloscopes are suitable for practically any usual applica-lions in servicing，cotntnunicaLions，scienlilic or industrial work. 口5 .A transistorize
16、d oscilloscope weighs about ten pounds or more.,Unit 12 Oscilloscope,上一页,下一页,返回,III. Translate the following sentences. 1 .The cathode-ray oscilloscope is one of the tnosl itnporlanl electronic measuring 2. The electron gun consists of a cathode，which emits electrons when it is heated, a control grid，an anode，which attracts the electron beam through it，and two sets of deflecti
