电子技术专业英语试题及参考答案_A卷_amajide

《电子技术专业英语》课程期末考试考试时间：100分钟，考核方式：笔试Part ІVocabulary and GrammarDirections：There are 20 incomplete sentences in this part.For each sentence there are four choices marked A,B,C and D.Choose the ONE answer that best completes the sentence.(20 points)( )1. -Where is Frank now?- He _______his bike in the yard.A.fixes upB. fixing upC. is fixing upD. fixed( )2. -You’ve left the light on, Tracy.-Oh, yes. _________ to turn it off right now.A. I’d goB. I’ve goneC. I’ll goD. I go( )3.“The World Without Thieves” is a very moving film. I ____ it twice already.A. will seeB. seeC. sawD. have seen( )4. The Oriental Pearl TV Tower ________ tens of thousands of visitors since l995.A. attractedB.attractsC. has attractedD.will attract( )5. -Did you see the traffic accident yesterday?-Yes. It happened when I past the museum.A. walkB. am walkingC. will walkD. was walking( )6. -Have you read this book?-Yes．I____ it two weeks ago．A．is reading B．have read C．will read D．read( )7.- What are you doing ,Jim?-I _________a beautiful horse.A. drawB. drewC. am drawingD. was drawing( )8. They______ all their money, so they have to walk home now.A. have spentB. spendC. spentD. are spending( )9. Jim is a student and ________in Town High School.A. studiesB. studiedC. had studiedD.study( )10.Sandy ________his old friend Tom when he was crossing the street.A. had metB. has metC. metD.meet( )11.A FET has three terminals: a souce,a drain and a ________.A.gateB.substractC.baseD.collector( )12.Transistor may be roughly grouped into two major divisions: ________ and field-effect. A.single B.polar C.bipolar D.collector( )13.In general,all material may be classified in three major catagories:conductors, ________and insulators.A.conductivityB.carbonC.diamondD.semiconductors( )14.A diode is an electrical device allowing current to move through it in ________ direction(s) with far greater ease than in the other.A one. B.two C.three D.four( )15.A diode may be thought of as a kind of switch:” ________” when forward-biased. Aopen. B. on C.closed D. off( )16.The BJT consists of ________region(s) of semiconductor material.A one. B.two C.three D.four( )17.VLSI is short form of “very large-scale________”.A.integratingB.integrationC.integrateD.integrator( )18.Bipolar transistors work as ________-controlled current regulators.A. currentB.voltageC.potentialD.drop( )19.Tomorrow we________ go for an outing unless it rains.A.willB.shallC.shouldD.would( )20.I ________ eighteen years old next year.A.am going toB.shall beC.should beD.would bePart ІІClozeDirections: Read the following text. Choose the best word or phrase for each numbered blank and mark A, B, C, or D.(10 points)The United States is a confederation（联邦）of states. Each state has the (26) to make laws with regard to the state. (27) , based on public opinion, states can (28) policies regarding education, and they may (29) a state income tax; they also determine the speed (30) , housing codes, and the drinking age.In most parts of the United States, you (31) be 21 years old to buy alcohol in a liquor (液体，溶液)store, bar, (32) restaurant. In some states you may buy beer in a grocery （杂货，食品）store. If a store sells alcohol to a minor, the (33) of the store is usually (34) a large sum of money. (35) , many areas have an open-container law, (36) means that people may not drink alcohol on the street or in a car. Anyone (37) with an open container of alcohol may be arrested.(38) , with all of these laws, the (39) of alcohol is a serious (40) in the United States and Canada. Drinking on college campuses, (41) there are many underage drinkers has (42) greatly. In fact, alcohol sales have gone up (43) the legal drinking age was (44) from 18 to 21. Some people believe that if there were no legal drinking age, (45) in some other countries, North American youth would drink less.( )21.A privilege B advantage C right D tradition( )22.A As a result B For example C In other words D In this case( )23.A demand B disagree C discuss D determine( )24.A collect B issue C demand D implement( )25.A limit B control C stop D regulation( )26.A can B shall C will D must( )27.A and B or C also D not( )28.A clerk B salesperson C owner D host( )29.A fined B charged C punished D suffered( )30.A In addition B In fact C In reality D In general( )31.A that B this C it D which( )32.A exposed B suspected C caught D detected( )33. A nevertheless B Anyway C Moreover D Therefore( )34.A application B consumption C expenditure D usage( )35.A condition B crisis C question D problem( )36.A though B as C where D which( )37.A raised B increased C peaked D climaxed( )38.D climaxed B since C before D after( )39.A shifted B upgraded C uplifted D changed( )40.A same B for C as D likePart ШReading ComprehensionDirections: Read the following text. Answer the questions on each text by choosing A,B,C or D. (10 points)The ostrich（鸵鸟）, the largest bird in the world at present, lives in the drier regions of Africa outside the actual deserts. Because of its very long, powerful legs and the floating effect of its extended wings, it is able to run at great speed over considerable distances.The female（雌性的）ostrich normally produces about twenty eggs every rainy season. When the female ostrich begins to lay her eggs, however, she does not begin in her own nest（巢、窝）.Instead she goes off in search of the nests of neighboring females and lays two or three eggs in each of them. By the time she has laid eight or nine eggs, she returns and lays the rest in her own nest.Because of the size of the eggs, the female ostrich cannot lay more than one every two days, so it takes her three weeks to finish laying in her own nest. During that period, she spends a lot of time away from her nest looking for food. And while she is off her nest, other females visit it tolay their eggs amongst hers. By the time she is ready to sit on the eggs to hatch（孵化）them, there could be up to thirty eggs in her nest, over half of which are not her own.The female ostrich can comfortably cover only about twenty eggs when she is sitting on the nest so before settling down she pushes the surplus（剩余，过剩的）ten or so eggs out of the nest. The rejected eggs, however, never include any of her own. Each female is remarkably consistent in the size and shape of the eggs she produces, so it is not difficult for her to distinguish her own from those of strangers.Of all the eggs laid by a colony of （群体）ostriches, only a very small number hatch into young birds. There are times when nests are left unprotected, for there are too few males to sit on all the nests at night. Thus there are ample（充足的）opportunities for their natural enemies to raid （袭击）the nests and eat the eggs. In fact, nearly 80% of the nests are destroyed. But even if a particular female’s nest suffers this fa te, there is a good chance that one or two of her eggs will be hatched in the nest of one of her neighbors.56.We learn from the text that an ostrich can go a long distance at high speed as ______.A.it is a special kind of birdB.it lives in large desert areasC.it has special wings and legsD.it is the largest bird in the world57.Normally, in every rainy season, the female ostrich produces about ______.A.12 eggs in her nestB.18 eggs in her nestC.20 eggs in her nestD.30 eggs in her nest58.The female ostrich would push some of the eggs out of her nest because ______.A.she can only hatch her own eggsB.those eggs are unlikely to be hatchedC.those eggs are to be hatched by othersD.she can only hatch a limited number of eggs59.The female ostrich identifies her own eggs by their size and ______.A.colorB.numberC.shapeD.weight60.The female ostrich lays her eggs in her neighbors' nests most probably because ______.A.her nest is not big enoughB.she cannot protect all her eggsC.she cannot tolerate all her eggsD.her nest is not comfortable enoughPart IV TranslationSection ADirections:There are 10 phases in this part.You are to translate the phases into Chinese or vice verse,and write them down in the blank.(20 points)1.threshold voltage( ) 6.运算放大器( )2.Schottky diode( ) 7.正向偏置( )3.differential amplifier( ) 8.电阻系数( )4.unity-gain buffer( ) 9.电容( )5.negative feedback( ) 10.电感( )Section BDirections:There are 2 passages in this part.You are to translate the passages into Chinese or vice verse,and write them down in the blank.(20 points)Passage 1The 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. R∝l.(b) The cross-sectional area of the conductor. Resistance, R, is inversely proportional to cross-sectional area, a, of a conductor, i.e. R∝1/a.(c) The type of material.(d) The temperature of the material.Passage 2The only functional difference between a p-n-p transistor and an n-p-n transistor is the proper biasing (polarity) of the junctions when operating. For any given state of operation, the current directions and voltage polarities for each type of transistor are exactly opposite each other.Part V WritingDirections:For this part,you should write a short essay entitled How to Learn Electronic ESP Well.You should write at least 100 words following the outline given below.(20 points)1.电子专业英语学习的重要性2.电子专业英语学习的内容3.如何学好专业英语How to Learn Electronic ESP Well。

《电⼦信息专业英语》课程期末考试卷（A卷）1 共2页第1页XXXX 职业技术学院20 19⾄2020学年第⼆学期考核试卷课程名称__电⼦信息专业英语___ 卷号 _A__ 课程考核类别：□考试□考查考核形式开卷笔试使⽤专业班级 XX 移动通信技术班出卷⼈ __XXX_______ 审卷⼈__XXX___ 考试时间__90___分钟⼀、Judge true and false according to technical knowledge.（每⼩题1分，共10分）1. Multimedia means many forms of communication such as audio and video.( )2. An embedded controller may lack any human-readable interface devicesat all. ( )3. There is no movement in the animation. ( )4. The microcontroller units use the embedded design and have higherintegration. ( )5. Before applying DSP, a digital signal must be converted into analog form.( )6. To avoid self-heating, the current through the RTD must be keptsufficiently low and constant. ( )7. The roles of the encoder and the demodulator are almost the same in thatboth prepare the signal appearing across its output terminals. ( )8. The Third Generation is the mobile multimedia based on CDMA technology.( )9. Insert an ammeter in the circuit to measure current. ( )10. View shortcut menus by left-clicking with the mouse. ( )⼆、Translate the following phrases and expressions.（每⼩题2分，共30分）(1)document (2)menu (3)version(4)integration (5)sideband (6)interference(7)transducer (8)detector (9)protocol(10)static graphic images (11) serial ports (12)read-only memory (13)an envelope detector(14)power amplifier (15)communication system三、Match Column A with Column B.（每⼩题2分，共10分）Column A Column B.（1）toolbar a. a device measure the temperature of environment base on the variation of resistance (2)DSP b. the medium used to transmit thesignal from the transmitter to the receiver (3)temperature sensing device c. common used computer commands chosen from the View/ menu, whichare displayed in tool buttons(4)amplification d. the processing of signals bydigital means(5)channel e. to compensate for the loss ofsignal power四、Choose the best answer.（每⼩题2分，共20分）1. The 555 integrated circuit is used for .A. timingB. filterC. amplifierD. instrument2. GPS determines by computing the difference between the time asignal is sent and the time it is received.A. distanceB. timeC. locationD. length3. Wireless communications means transmission of information by .A. optical fiberB. cableC. radioD. fixed telephone4. Resistance-Temperature Detector is a device which be used tomeasure .A. temperatureB. resistanceC.voltageD. current5. Digital television receiver covert the ananlog, or , electronictelevision signals received by an antenna into an electronic digital code.A. separateB. continuousC. slenderD.disperse6. The phrase ”volatile memory ” can be replace by .A. ROMB.RAMC. EEPROMD. EPROM7. A digital signal consits of a stresm of numbers, usually(but notnecessary) in form.专业班级_____________ 学号______________ 姓名________________装订线A. binaryB. decimalC. analogD. octal8. The radio receiver has the task of the imcoming modulated signal.A. amplifyingB. transmittingC. modulatingD. demodulating9. The chooses the best form for the signal in order to optimize its detection at the ouput.A. encoderB. decoderC. modulatorD. demodulator10. The value of one resitance is 2kΩ, another is 4kΩ, these two resistor are in parallel with eachother and in series with a battery of 12V. The current following through the resistor which resistance is 4kΩis .A. 9mAB. 6mAC. 3mAD. 2mA五、Translate the following sentences into Chinese.（每⼩题6分，共30分）1. Multimedia technology combines audio and visual material to enhance communication and enrich multimedia presentation.2. In addition to all arithmetic and logic elements of a general purpose microprocessor, the microcontroller usually also integrates additional elements such as read-only and read-write memory, and input/output interfaces.3. In a broadcasting system, irrespective of whether it is based on amplitude modulation or frequency modulation, the receiver not only has the task of demodulating the incoming modulated signal, but it is also required to perform some other system functions such as carrier-frequency tuning, filtering, amplification.4. Television is a system of sending and receiving pictures and sound by means of electronic signals transmitted through wires and optical fibers or by electromagnetic radiation.5. Multimedia services add high speed data transfer to mobile devices, allowing new video, audio and other applications through mobile phones —allowing music and television and the Internet to be accessed through a mobile terminal.1 共2页第1页。

（.本试卷共有 五 大题，满分 100 分，考试时间 120 分钟）一. 词汇与句子结构单项选择题 (每题1分，共20分)1. ( ) Hello,is that Ace computer? I’m calling ________ the LAN adapter in mydesktop computer is not working.A. due toB. becauseC. in spite ofD. regardless of2. ( )The most visible_______ of Windows 98 is the Active Desktop, whichintegrates Internet Explorer with the operation system.A.familyB. releaseC. featureD. port3. ( )Every chacracter in storage is represented by a string of 0s and 1s —the onlydigitals found in the _________ numbering system.A. decimalB. binaryC. computer languageD. digital4. ( ) A file is a/an _______ data type defined and implemented by the operatingsystem.A. concreteB. abstractC. analyticalD. absent5. ( ) A microprocessor is a _______ whose elements have been miniaturized intoone or a few integrated circuits .A. deviceB. programC. softwareputer6. ( ) Mr. Zhang, _______ to meet Frank Jemison. He’s our Chief TechnicalOfficer.A. I like youB. I’d likeC. I’d like youD.you’d like7. ( )Excuse me, but _______ you would like to go to my dinner party this evening. A. I was wonder B. I was wondering atC. I was wondering ifD. I wonder at8. ( )I’ll see i f Ms. Jackson is available. Ok, just a moment, please. I’ll _________. A. put you through B. put through youC. put over youD. put you over9. ( ) I’m sorry, but I _______ our launch meeting appoinment. I have pressingbusiness to attend to.A.was canceledB. have to cancleC. have cancleD. cancle out10.( ) Well, I suggest all our employees_________ uniforms during business hours.A. puts onB. put offC. shall put onD. should put on11. ( )A FET has three terminals: a souce,a drain and a ________.A.gateB.substractC.baseD.collector12. ( )Transistor may be roughly grouped into two major divisions: ________ andfield-effect.A.singleB.polarC.bipolarD.collector13. ( )In general,all material may be classified into three major catagories:conductors,________and insulators.A.conductivityB.carbonC.diamondD.semiconductors14. ( )A diode is an electrical device allowing current to move through it in ________direction(s) with far greater ease than in the other.A one. B.two C.three D.four15. ( )A diode may be thought of as a kind of switch:” ________” when forward-biased.A. open.B. onC.closedD. off16. ( )The BJT consists of ________region(s) of semiconductor material.A one. B.two C.three D.four17. ( )VLSI is short form of “very large-scale________”.A.integratingB.integrationC.integrateD.integrator18. ( )Bipolar transistors work as ________-controlled current regulators.A. currentB.voltageC.potentialD.drop19. ( )Tomorrow we________ go for an outing unless it rains.A.willB.shallC.shouldD.would20. ( )I ________ eighteen years old next year.A.am going toB.shall beC.should beD.would be二.完型填空 (每题1分，共10分)One year Miss Wyatt decided to have a holiday in Italy. She did not speak 1 Italian, but wherever she went, she was fortunate enough to find people who knew 2 English to be able to 3 what she wanted, until one day she decided to have lunch in a charming little restaurant in a village 4 the south of Italy.She had seen some nice mushrooms in the market of another village near there and thought they would taste very 5 , so when the waiter came to take her 6 for lunch, she inquired whether she could have some 7 for her meal, but she had great 8 in explaining to him, because 9 did not know the Italian word for mushrooms.At last she took out a pencil and drew a picture of a mushroom. The waiter’s face 10 at once, and hastened out to the kitchen. A minute later he returned, carrying an umbrella.( ) 1. A. much B. a great deal C. a lot D. a little( ) 2. A. certain B. full C. enough D. special( ) 3. A. give B. get C. show D. understand ( ) 4. A. in B. to C. on D. outside( ) 5. A. well B. nicely C. soon D. good( ) 6. A. bill B. order C. dish D. check( ) 7. A. meat B. dishes C. mushrooms D. apples( ) 8. A. difficulty B. interest C. pleasure D. patience ( ) 9. A. she B. he C. they D. everybody ( ) 10. A. brightened B. astonished C. burned D. worried三、阅读理解（每题2分，共10分)Not very long ago, a special family system existed in certain parts of South India. In this system, th e actual head of a family unit was the mother’s eldest brother, though the mother also had an important position in the family. In families of this kind, a husband was actually no more than a visitor. He did not live with his wife , but with his own mother, brothers and sisters in another house. He saw his sons and daughters sometimes, but the man who actually fed and cared for them and acted as their father was their uncle—their mother’s brother.But this system, in which brothers and sisters take the place of the father, no longer exists in South India except in a few villages. Economic changes have had far-reaching effect on family life, so family life began to change when men sent out to work in factories and offices instead of working with their mothers, brothers, and sisters on the land. When a man went out to work he had money of his own and could buy his own land and build his own family, instead of depending on his mother and his brothers. He wanted to be independent. This is an example of the way in which economic relations can have an effect on family relationships.（）1. The best title of this passage is .A.Husband Actually Visitor in FamilyB.Family System in South IndiaC.Wife Has Important Position in FamilyD.Economic Relations Affects Family Relationships（）2. Who had the actual control of a family in South India not long ago?A.Mother.B.The mother’s eldest brother.C.The father.D.The father’s mother.（）3. In this system, the husband lived together with his .A. wifeB. sons and daughtersC. mother, brothers and sistersD. wife’s brother（）4. Now in South India there are of this system in which a husband has no control of his family.A. no familiesB. many more familiesC. very few familiesD. not any families（）5. What has caused such a strange family system to die away?A.The fact that the mother has not got any brother.B.The fact that the father has got his own house and land.C.The changes in economic relations.D.The changes in family relationships.四、翻译（共40分）A．常用词组翻译（每题2分，共20分）1. 自由电子（）2. nucleu of the atom ( )3. 集成电路（）4. oprational amplifier ( )5. 反向输入端（）6. digital electronics ( )7. 触发器（）8. troubleshooting manuals ( )9. 中央处理器（） 10. local area network ( )B．篇章翻译（每题10分，共20分）1. Starting the PC for the firsr timeYour PC has preinstalled software. This software is installed the first time you start the PC. The software initialization takes approximately three minutes, and：●sets up the software in your language.●Sets up the software to use the hardware installed in your computer—notethat you can change the settings after the sofeware has been initialized.2. Multimedia is not a new word. In fact, the concept of multimedia has been around for years. However, it appears that multimedia has finally started to play an increasingly important role in today’s computer world. Because of ever more powerful computer systems and the experience of creative programmers, multimedia is truly changing the way people are using computers.五、按照所给话题，写一篇不少于100字的小短文。

1、汉译英1)直流电路direct current circuits2)放大器（扩音器）amplifier3)模拟电子技术analog electronics4)半导体二极管semiconductor diode5)晶体管效应transistor effect6)微处理器microprocessor7)电气工程electrical engineering8)能源工程（或电力工程）power engineering9)通信工程telecommunications engineering10)内部器件internal devices11)电子元件electrical components12)欧姆定律Ohm law13)限制电流limit current14)分压器voltage divider15)晶体管偏置电路transistor biasing circuits16)阻碍电流block DC current17)存储点能store electrical energy18)感抗inductive reactance19)绝缘材料insulating material20)交流阻抗AC resistancea)通用仪表general-purpose meterb)模拟仪表analog meterc)交换测试笔reverse the test leadsd)机械调节mechanical adjuste)测量电阻measure resistancef)正向电压positive voltageg)测量电流measure currenth)电压幅度voltage amplitudei)双踪示波器dual-trace oscilloscopej)信号发生器signal generator21)PN结PN junction22)三极管bipolar transistor23)电子和空穴electron and hole24)稳压电源electronic power supply或steady DC voltage source25)桥式整流器bridge rectifier26)脉冲直流电pulsating DC27)二极管的正极anode of diode28)峰值电压peak voltage29)电容滤波器capacitor filter30)充电和放电charge and discharge31)稳压管Zener diode32)电器电子工程师学会IEEE(Institute of Electrical and Electronics Engineers)33)专业技术组织technical professional association34)基尔霍夫电压定律Kirchhoff’s V oltage Law35)电压源voltage sources36)电荷守恒定律the law of conservation of electric charge37)在每一瞬时at every instant of time38)元件两端的电压voltages across elements39)无线电传输radio transmission40)频率调制或调频frequency modulation41)频域the frequency domain42)线性电阻linear resistor43)调幅波形amplitude modulation wave44)专用集成电路（ASIC）45)快速时间响应fast response time46)有效信号valid signal47)十进制数字系统decimal system48)逻辑运算logic operation1)控制信号线the control bus2)中断线interrupt lines1)结构化语言structured language2)局部变量local variables3)副作用side effect4)汇编语言指令assembly language instructions1)静止图像still image2)阴极射线管，显像管CRT or the cathode ray tube3)像素pixel4)电子束electron beam2、英译汉1)assembler language汇编语言2)alternating current circuits交流电路3)passive electrical circuits无源电路4)three phase circuits三相电路5)digital electronics数字电子技术6)logic gates逻辑门7)3D virtual reality image三维虚拟图像8)computer programming计算机编程9)major in（在大学里）主修10)advanced programming techniques高级编程技术1)known as capacitive reactance称为容抗2)with units ohms单位为欧姆3)prevent device from burning out防止器件烧掉4)has an AC resistance to AC current对交流电流由阻抗5)adjustment with a screw用一个螺丝调节6)in the shape of a cylinder 呈圆柱形式7)block DC current，but pass AC current阻直流通交流8)to vary the inductance改变电感9)be given by the formula 由公式给出10)the RF amplifier 音频放大器1)analog multimeter模拟万用表2)extended range扩展范围3)specific meters特殊仪表4)includes the function and range switches具有功能及范围选择旋钮5)present an electronic picture呈现一幅电子图像6)display the voltage waveform显示电压波形7)appear on the screen在屏幕上出现8)phase relationships相位关系9)an example例如，作为一个例子10)in series with the circuit串连接入电路1)Semiconductor material半导体材料2)forward biased正向偏置3)depend on the external circuit resistance取决于外部电路的电阻4)excessive reverse-biased voltage过高的反偏电压5)is directly proportional to the amount ofbase current是正比于基极电流6)may even appear almost as a short几乎可看成是短路7)cause stability problems for a transistorcircuit引起晶体管电路的稳定性问题8)digital technology数字技术9)the most popular technology最常用的技术10)use two complementary typeset oftransistors N-channel and P-channel用两种互补型的晶体管——N沟道和P沟道1)equipment operation设备的运行2)device that converts AC into DC把交流电转换成直流电的器件3)the power lines电源线4)depending on the value of DC voltageneeded 根据所需要的直流电压值5) a half-wave rectifier平波整流器6)so as to produce a constant DC output从而产生一个稳定的直流输出7)in the negative side of the capacitor在电容的负极8)flow through the load流过负载9)in the forward-biased condition在加正向偏置电压的条件下10) a series（current-limiting）resistor一个串联（限制电流）电阻1)current source电流源2)under this circumstance在这种情况下3)present the second of Kirchhoff’s laws给出基尔霍夫第二定律4)introduce the concept of a “loop”引入“回路”的概念5)An alternative statement of KVLKVL的另一种表述法6)voltages algebraically sum电压代数和7)sinusoidal steady-syate response正弦稳态响应8)ordinary household voltage日常用电的电压9)time-invariant circuit时不变电路10)percentage of modulation调制百分比reduce the power consumption减小消耗功率flip-flop 触发器the octal and hexadecimal systems当时钟脉冲信号来到时改变状态①直流电路direct current circuits②放大器（扩音器）amplifier③欧姆定律Ohm law④正极positive electrode⑤充电与放电Charge and discharge⑥无线电传输Radio transmission⑦模拟仪表Analogue Meters⑧模拟电子技术analog electronics⑨半导体二极管semiconductor⑩晶体管效应transistor effect⑪微处理器microprocessor⑫通信工程telecommunications engineering ⑬汇编语言assembler language⑭电子元件electrical components⑮限制电流limit current⑯分压器voltage divider⑰偏置电路biasing circuits⑱阻碍电流block DC current⑲感抗inductive reactance⑳容抗capacitive21正向电压positive voltage22扩展范围extended range23电压波形voltage waveform24连接入电路in series with the circuit25PN结PN junction 26三极管bipolar transistor27电子与空穴electron and hole28半导体材料semiconductor material29正向偏置forward biased30数字技术digital technology31桥式整流器bridge rectifier32稳压管Zener diode33电源线the power lines34在电容的负极in the negative side of the capacitor 在加正向偏置的条件下in the forward-biased condition一个串联电阻 a series (current-limiting)resistor35电压源voltage sources36在每一瞬时at every instant of time37无线电传输radio transmission38频率调制或调频frequency modulation39快速时间响应fast response time40有效信号valid signal41结构化语言structured language42局部变量local variables43副作用side effect44静止图像still image45阴极射线管pixel46电子束electron beam1.resistors are used to limit current flowing to adevice ,thereby preventing it from burning out, as voltage dividers to reduce voltage for other circuits, as transistor biasing circuits, and to serve as circuit loads.电阻常用做限流器，限制流过器件的电流防止烧坏器件，电阻也可用作分压器，以减小其他电路电压，还可以用在晶体管偏执电路中和作为电路负载。

《电子技术专业英语》期末考试试卷 A卷答案及评分标准I.Multiplechoice(20’) 每题2分1---5 BACBC 6---10 CBAABII. Match up(20’)每小题2分1---5 5，9，15，11，76---10 10，2，3，13，6II. phrase translation(20’)每小题2分1 无源电路2 汇编语言3 地址总线4 模拟万用表5半导体材料6芯片插座7电压峰-峰值8双踪示波器9 流程图10信号发生器IV. Sentence tranlation(20’)每小题5分1. 数字集成电路对现代社会的影响是普遍深入的，没有数字集成电路，将不存在当代的计算机和信息技术革命。

2. 万用表是一种通用仪表，能用来测量直流和交流电压、电流、电阻值，有时候还能测量分贝。

3. 当测量电流时，必须断开电路，（然后）将万用表与待测电路或元器件相串联。

4. 摩尔定律指出：集成在一个芯片上的器件数量将每两年翻一番。

这在许多年来都是正确的。

V. put the following into english(20’)与Pascal语言相似，C通常被看成是一种结构化语言。

在C语言中，一个代码块是一组逻辑上相联系的程序语句，它们可以被看成是一个单元（块）。

你可以在左右两个花括号之间插入几行代码创建一个代码块。

如：if(x<10){printf (“too low, try again”);reset_counter(-1);}如果x小于10，if 后面的位于花括号之间的两个语句就被执行。

这两个句子连同两个花括号表示一个代码块，这两个语句是连系在一起的：不可能只执行其中一个语句，而不执行另一个语句。

电子科技英语试题及答案一、选择题（每题2分，共20分）1. Which of the following is not a feature of electronic components?A. High precisionB. High reliabilityC. Low power consumptionD. Large size答案：D2. What is the basic unit of digital information?A. BitB. ByteC. KilobitD. Megabyte答案：A3. In electronics, what does the term "analog" refer to?A. Continuous signalsB. Discrete signalsC. Digital signalsD. Binary signals答案：A4. Which of the following is not a type of semiconductormaterial?A. SiliconB. GermaniumC. PlasticD. Gallium arsenide答案：C5. What is the function of a transistor in an electronic circuit?A. To amplify signalsB. To store dataC. To convert light into electricityD. To filter signals答案：A6. What is the primary function of a capacitor in an electronic circuit?A. To block DC and allow ACB. To block AC and allow DCC. To store electrical energyD. To convert voltage into current答案：C7. What does the abbreviation "LED" stand for in electronics?A. Light Emitting DiodeB. Large Emitting DiodeC. Limited Emitting DiodeD. Low Emitting Diode答案：A8. What is the purpose of a resistor in an electronic circuit?A. To control voltageB. To control currentC. To store energyD. To amplify signals答案：B9. Which of the following is a type of passive component in electronics?A. TransistorB. DiodeC. RelayD. All of the above答案：D10. What is the term used to describe the flow of electric charge?A. VoltageB. CurrentC. ResistanceD. Capacitance答案：B二、填空题（每题2分，共20分）1. The smallest unit of electric charge is called an ________.答案：electron2. A ________ is a type of electronic component that can store energy in an electric field.答案：capacitor3. The process of converting sound into electrical signals is known as ________.答案：modulation4. In digital electronics, a ________ is a single digit number, either 0 or 1.答案：bit5. A ________ is a semiconductor device that can amplify or switch electronic signals and electrical power.答案：transistor6. The unit of electrical resistance is the ________.答案：ohm7. An ________ is a semiconductor device that allows current to flow primarily in one direction.答案：diode8. The ________ is a passive component that opposes the flow of alternating current.答案：inductor9. A ________ is a type of display device that uses liquid crystals to produce images.答案：LCD10. The ________ is a type of electronic component that can store data.答案：memory三、简答题（每题10分，共20分）1. Explain the difference between an analog and a digital signal.答案：Analog signals are continuous and can represent a wide range of values, while digital signals are discrete and can only represent specific values, typically as a series of ones and zeros.2. Describe the role of a microprocessor in a computer system. 答案：A microprocessor is the central processing unit of a computer system, responsible for executing instructions, performing calculations, and controlling other system components to perform various tasks.四、翻译题（每题15分，共30分）1. Translate the following sentence into English: “在电子设备中，晶体管通常用作放大器或开关。

电子信息技术专业英语习题答案电子信息技术专业英语第2版习题答案Exercise AnswersPart one ElectronicsUnit 1 Electronic ComponentsExercises1.(1)the simplest components in any circuit(2)converting electrical energy into heat.(3)仅沿单向流动(4)on or off switch(5)称为电绝缘的绝缘材料2. (1)current(2)circuit(3)charge(4)conductors(5)Transistors3. (1)which ---atoms(2)it---balloon(3)it---The unit of voltage, or potential difference(4)which---a wall or the ceiling(5)it---the charge of an electron is a negative one of 1.60218x10-19 coulombs4. (1)constitute(2)consists of(3)is composed of(4)makes up(5)constitute5. (1) Resistors can reduce the flow of current.(2) Capacitors consist of two pieces of conducting materials separated by a non-conducting material called a dielectric.(3)The function of a transistor is similar to a switch.Unit 2 SemiconductorExercises1．(1)集成电路(2)半导体的导电性(3)positive type material semiconductor(4)forward bias(5)每秒可完成上百万的简单指令操作2．(1)---(a)(2)---(c)(3)---(b)(4)---(e)(5)---(d)3. (1)√(2)x (3)x (4)√ (5) √4.(1)只要加很小的电压就能让电流流动的材料称为导体。

专业英语试题------翻译资料A1.The number system with which we are most familiar is the base 10, or decimal system. Recent technological developments have created the need for other number systems. The electronic computer, for example, required the development of systems that were easily adapted to electronic processes. These number systems were binary (base 2), octal (base 8), and hexadecimal (base 16). The binary system is the primary language of the computer and the octal and hexadecimal systems are usually used for communication with the computer and for the storage of information within the computer. Since computers can only process binary numbers or numbers coded in other systems such as octal and hexadecimal, the decimal system must be converted to one of the other systems before it can be processed by the computer. When the computer finishes its operations on the information, the output is printed or displayed in number system other than decimal, and this too must be converted, this time back to the decimal system.2.The edge triggered RS flip flop actually consists of two identical RS latch circuits.The inverter connected between the two CLK inputs ensures that the two sections will be enabled during opposite half cycles of the clock signal. This is the key to the operation of this circuit. Therefore，theQ and _Q outputs can only change state when the CLK signal falls from a logic 1 to logic 0. This is known as the falling edge of the CLK signal; hence the designation edge triggered flip flop.3. The FET shown is an N-channel FET, which is composed of two N-type regions separated by a P-type substrate. When a voltage is applied to the insulated gate terminal, a current is enabled to flow from the drain to the source. It is called N-channel, because the gate voltage induces an N-channel within the substrate, enabling current to flow between the N-regions.4.An inductor is an electrical device which can temporarily store electromagnetic energy in the field. The inductor is a coil of wire that may have an air core of an iron core to increase its inductance. A powered iron core in the shape of a cylinder may be adjusted in and out of the core. An inductor tends to oppose a change in electrical current, it has no resistance to DC current but has an AC resistance to AC frequency and is given by the formula X L=2πfL, with units of ohms. Inductors are used for filtering AC current. It is electrically opposite to the capacitor. Its value is expressed in Henry (more commonly milliHenries). There are two major types of inductors, air core and iron core.1. 我们最熟悉的是数字系统的基数为10，或十进位制。

2011 至2012 学年第1 学期《电子技术专业英语》试卷（A ）1. There can be no doubt the 1900s is remembered as the electronic century.A. whichB. thatC. what2. Electrons, as one knows, are minute charge of electricity.A. negativeB. positiveC. reverse3. A resistor is an electrical component that the flow of electrical current.A. increasesB. changesC. resists4. Frequency is the reciprocal of the period, if the period is 4ms, then the frequency would be .A. 4m/sB. 0.25KHzC. 25Hz5. The sixth power of two is .A. 12B. 36C. 646. A capacitor will block current, but appears to pass current by charging and discharging.A. DC…ICB. AC…DCC. DC…. AC7. For a 4-band resistor with “color code”, the first band is the values.A. hundredsB. tensC. ten8. An electronic device often used for amplifying voltage and current is _____________.A. transistorB. conductorC. diode9. In a diode, current flows in ________ direction across the junction.A. only oneB. twoC. three10. A __________ amplifier provides signal amplification with little or no distortion, so that the output is proportional to the input.1.电压有效值（）2.微处理器（）3.电子元件（）4.公共端插孔（）5.外阻（）6.放大器（）7.脉冲直流（）8.电压源（）9.系统设计（）10.逻辑运算（）（1）internal resistance （2）pulsating DC （3）voltage sources（4）logic circuits （5）RMS voltage （6）logic operation（7）external resistance （8）number systems （9）Microprocessor（10）amplifier （11）common jack （12）digital logic circuits（13）system design （14）anode of diode （15）electrical components三、短语翻译（每小题2 分，共20 分）1. Passive electrical circuits2. Assembler language3. The address bus4. Analog multimeter5. Semiconductor material6. chip holders7. peak-to-peak voltage8. dual-trace oscilloscope9. Flowchart10. Signal generator1 / 4四、句子翻译（每小题5 分，共20 分）1. The impact of digital integrated circuits on our modern society has been pervasive. Without them, the revolution of current computer and information-technology would not exist.2. A multimeter is a general-purpose meter capable of measuring DC and AC voltage, current, resistance, and in some cases, decibels.3. When measuring current, the circuit must be opened and the meter inserted in series with the circuit or component to be measured.4. Moore's law, which predicted that the number of devices integrated on a chip would be doubled every two years, was accurate for a number of years.五、综合运用（每小题20分，共20 分）C is commonly considered to be a structured language with some similarities to Pascal. In C, a block of code is a logically connected group of program statements that can be treated as a unit. You can create a block of code by placing lines of code between opening and closing curly braces. For example:if(x<10){printf (“too low, try again”);reset_counter(-1);}The two statements after "if" that are between the curly braces are executed if x is less than10. These two statements with the braces represent a block of code. They are linked together:one of the statements cannot execute without the other also executing.(将上面的短文翻译成中文)2 / 43 / 42011 至2012 学年第 1 学期《 电子技术专业英语 》试卷（ A ）1. There can be no doubt the 1900s is remembered as the electronic century.A. whichB. thatC. what2. Electrons, as one knows, are minute charge of electricity.A. negativeB. positiveC. reverse3. A resistor is an electrical component that the flow of electrical current.A. increasesB. changesC. resists4. Frequency is the reciprocal of the period, if the period is 4ms, then the frequency would be .A. 4m/sB. 0.25KHzC. 25Hz5. The sixth power of two is .A. 12B. 36C. 646. A capacitor will block current, but appears to pass current by charging and discharging.A. DC …ICB. AC …DCC. DC …. AC7. For a 4-band resistor with “color code ”, the first band is the values.A. hundredsB. tensC. ten8. An electronic device often used for amplifying voltage and current is _____________.A. transistorB. conductorC. diode9. In a diode, current flows in ________ direction across the junction.A. only oneB. twoC. three10. A __________ amplifier provides signal amplification with little or no distortion, so that the output is proportional to the input.A. nonlinearB. linearC. electronic 1.电压有效值（ ） 2. 微处理器（ ） 3.电子元件（ ） 4.公共端插孔（ ） 5.外阻（ ） 6.放大器（ ） 7.脉冲直流（ ） 8.电压源（ ）9.系统设计（ ） 10.逻辑运算（ ）（1）internal resistance （2）pulsating DC （3）voltage sources （4）logic circuits （5）RMS voltage （6）logic operation （7）external resistance （8）number systems （9）Microprocessor （10）amplifier （11）common jack （12）digital logic circuits （13）system design （14）anode of diode （15）electrical components 三、短语翻译（每小题 2 分，共 20 分）1. Passive electrical circuits 无源电路2. Assembler language 汇编语言3. The address bus 地址总线4. Analog multimeter 模拟万用表5. Semiconductor material 半导体材料6. chip holders 芯片插座7. peak-to-peak voltage 电压峰-峰值8. dual-trace oscilloscope 双踪示波器 9. flowchart 流程图 10. signal generator 信号发生器1. The impact of digital integrated circuits on our modern society has been pervasive. Without them, the revolution of current computer and information-technology would not exist.数字集成电路对现代社会的影响是普遍深入的，没有数字集成电路，将不存在当代的计算机和信息技术革命。

电子信息专业英语答案中英文对应Unit 1 电子学：模拟和数字Unit 1-1第一部分：理想运算放大器和实际限制The approach to such a situation is to be methodical, and take the necessary time to read and understand each definition in the order that it is listed. Without a real appreciation of what each means, the designer is doomed to failure. The objective is to be able to design a circuit from the basis of the published data, and know that it will function as predicted when the prototype is constructed.In order to discuss the ideal parameters of operational amplifiers, we must first define the terms, and then go on to describe what we regard as the ideal values for those terms. At first sight, the specification sheet for an operational amplifier seems to list a large number of values, some in strange units, some interrelated, and often confusing to those unfamiliar with the subject. It is all too easy with linear circuits, which appear relatively simple when compared with today’s complex logic arrangements, to ignore detailed performance parameters which can drastically reduce the expected performance.2为了讨论运算放大器的理想参数，我们必须首先定义一些指标项，然后对这些指标项讲述我们所认为的理想值。

电子科技英语试题及答案一、选择题（每题2分，共20分）1. The term "semiconductor" refers to materials that have electrical conductivity between that of a conductor and an insulator.A) TrueB) False2. Which of the following is not a type of electronic component?A) ResistorB) CapacitorC) InductorD) Transistor3. The unit of electrical resistance is the ohm, symbolized by:A) ΩB) mAC) VD) A4. The process of converting analog signals to digital signals is known as:A) ModulationB) DemodulationC) Analog-to-Digital Conversion (ADC)D) Digital-to-Analog Conversion (DAC)5. In the context of electronic circuits, what is the purpose of a diode?A) To amplify signalsB) To block the flow of current in one directionC) To store energyD) To filter signals6. What does the acronym "CPU" stand for in computing?A) Central Processing UnitB) Central Power UnitC) Central Programming UnitD) Central Print Unit7. The term "bandwidth" in telecommunications refers to:A) The width of a transmission bandB) The speed of data transmissionC) The quality of a transmission lineD) The cost of a transmission service8. Which of the following is a type of programming language used in electronics?A) JavaB) C++C) Both A and BD) Neither A nor B9. The basic unit of information in digital systems is the:A) BitB) ByteC) KilobitD) Megabyte10. What does "RAM" stand for in computer memory?A) Random Access MemoryB) Rapid Access MemoryC) Read Access MemoryD) Recorded Access Memory二、填空题（每空1分，共10分）11. The ________ is the fundamental unit of electric charge.12. A ________ is a type of electronic device that can change resistance based on an input signal.13. The process of converting digital signals to analog signals is known as ________.14. In computer architecture, ________ refers to the internal communication pathways within a computer.15. The speed of a computer's processor is often measured in ________.三、简答题（每题5分，共20分）16. What are the three main components of a microprocessor?17. Explain the difference between a parallel and a serial communication system.18. What is the role of a filter in an electronic circuit?19. Describe the function of a transistor in an amplifier circuit.四、翻译题（每题5分，共10分）20. 将以下句子从英文翻译成中文："The development of integrated circuits hasrevolutionized the electronics industry."21. 将以下句子从中文翻译成英文：“光纤通信具有传输速度快、抗干扰能力强等优点。

电子信息工程专业英语课后答案电子信息工程专业英语-教师用书Part 1第一课关于电子技术一、课文习题参考答案Ⅰ. （1） alternating current circuits （2） semiconductor diodes（3） passive component（4） the combinatory logic electric circuit（5） rectification（6） Laplace transform（7） inductor（8） Fourier series and Fourier transformⅡ.（1）控制理论（2）场效应管三极管（3）布尔代数（4）稳压（5）相关性和功率谱密度（6）滤波器类型（7）模/数转换器（8）时序逻辑电路的分析与综合Ⅲ.(1)Electronics is a part of the larger field of electricity. The basic principles of electricity are also common to electronics. Modern advances in the field of computer, control system, communications have a close relationship with electronics. The field of electronics includes the electron tube, transistor, integrated circuit and so on.(2) Direct current circuits & Alternating current circuits,Analog electronics,Digital electronics,signal and systems,Circuit theory and design, Control theory, Microcontrollersystems,Computer programming for engineering applications.(3) This curriculum mainly introduces the characteristics of semiconductor devices in linear application scope.The content involved in semiconductor diodes (PN junction diodes, special purpose diodes), transistors (field effects and bipolar transistors), signal amplifiers, practical amplifiers, biasing circuits, operationalamplifiers circuit and other circuits (rectification, regulation and DC power supplies).(4) This partial studies take the basicelectric circuit theory and the operational amplifier knowledge as the foundation. The main study goal is to enhance understanding of the electric circuit theory. Its main content includes the elementary theory in circuit theory (network functions, characteristic frequencies), types offilter (lowpass,bandpass), review of operational amplifiers (design of first and second order using operational amplifiers, cascade design), filter characteristics(Butterworth, Chebyshev, frequency transformations in design, sensitivity design of passive LC ladder filters and a brief introduction to switched capacitor filters).(5) Perfect.二、参考译文电子学的发展电子学是电学的一部分。

英语电子技术英语40题1. Which of the following is a common component in an electronic circuit?A. ResistorB. CapacitorC. TransistorD. All of the above答案：D。

本题考查电子电路中常见的组件。

选项A“Resistor（ 电阻）”、选项B“Capacitor（ 电容）”和选项C“Transistor（ 晶体管）”都是电子电路中常见的组件，所以选择D“All of the above（ 以上都是）”。

2. In an electronic device, what is used to store electrical energy?A. BatteryB. InductorC. CapacitorD. Generator答案：C。

本题考查电子设备中电能存储的部件。

选项A“Battery 电池）”主要是提供电能；选项B“Inductor（电感）”通常用于滤波等；选项C“Capacitor（ 电容）”能够存储电能；选项D“Generator（ 发电机）”是产生电能的设备。

所以答案是C。

3. What is the function of a diode in an electronic circuit?A. To amplify the signalB. To rectify the currentC. To store the chargeD. To control the voltage答案：B。

本题考查二极管在电子电路中的功能。

选项A“To amplify the signal（放大信号）”是三极管的作用；选项C“To store the charge（ 存储电荷）”是电容的作用；选项D“To control the voltage（ 控制电压）”通常由稳压器实现。

而二极管的主要功能是B“To rectify the current 整流电流）”。

2013～2014学年第一学期1106-1107班《电子信息技术专业英语》试卷（考试时间90分钟）一、单词翻译（20%）1. switch 11. component2. device 12. circuit3. instruction 13. resistor4. junction 14. capacitor5. combination 15. diode6. manufacture 16. transistor7. structure 17. current8. principle 18. voltage9. wafer 19. amplifier 10. analog20. insulator二、词组互译（20%） 1. 广泛应用于 11. electronic circuit 2. 把…. 分成…… 12. variable resistor 3. 打算…… 13. direct currents 4. 根据…… 14. integrated circuit 5. 将…..应用于 15. forward bias 6. 提到、指 16. N-type material 7.由……组成 17. electronic counter 8. 用做…… 18. frequency synthesizer 9. 被称做…… 19. digital instrument 10. 形成 20. operational amplifier三、判断正误，用“T ”或“F ” 表示(10%)1. The conductivity of semiconductors is higher than that of insulators But lower than that of conductors. ( )2. Silicon materials can conduct electricity when they are in purestate. ( )3. A semiconductor of n-type means that the pure material have been added impurities with three outer electrons. ( )班级 学号 姓名4. It is called forward bias if a diode is connected to an external voltage to make the p-type region positive and the n-type region negative. ( )5. An n-type and a p-type material created side by side can form a p-n junction. ( )四、回答问题（15%）1. What component can restrict the flow of electrons?2. What component can be used to change AC into DC?3. What component can amplify small signal?4. Material can be divided into three types, what are they?5. What function can integrated circuits perform?五、句子翻译（20%）1. The transistor acts as a switch.2. Diodes conduct electricity in only one direction.3. Digital ICs can be used in computers.4. ICs have a small size and low cost and therefore they are widely used in different fields.5. Substance can be divided into three types: conductors, semiconductors andinsulators.六、段落翻译（15%）An integrated circuit look like nothing more than a tiny chip of metal, perhaps one-half of a centimeter on a side, and not much thicker than a sheet of paper. It is so small that if it fell on the floor, it could be easily swept up with the dust. Although it is very small, it represents the most highly skilled technology at every step of its manufacture. At today’s level of development, it might comprise more than ten thousand separate electronic elements including elements of many different functions, such as diodes, transistors, capacitors and resistors.2013～2014学年第一学期1106-1107班《电子信息技术专业英语》补考答题卷（考试时间90分钟）一、单词翻译（20%）1.__________________________ 11. ________________________2.__________________________ 12._________________________3.__________________________ 13._________________________4. _________________________ 14. _________________________5.__________________________ 15.________________________ 6 ._________________________ 16.________________________ 7 ._________________________ 17.________________________8. _________________________ 18.________________________ 9 ._________________________ 19.________________________ 10._________________________ 20.________________________ 二、词组互译（20%）1.__________________________ 11. ________________________2.__________________________ 12._________________________3.__________________________ 13._________________________4. _________________________ 14. ________________________5.__________________________ 15.________________________ 6 ._________________________ 16.________________________ 7 ._________________________ 17.________________________8. _________________________ 18.________________________ 9 ._________________________ 19.________________________ 10._________________________ 20.________________________三、判断正误，用“T ”或“F ” 表示(10%)1._____2._____3.______4.______5.________(10%)。

电子信息技术专业英语第2版习题答案Exercise AnswersPart one ElectronicsUnit 1 Electronic ComponentsExercises1.(1)the simplest components in any circuit(2)converting electrical energy into heat.(3)仅沿单向流动(4)on or off switch(5)称为电绝缘的绝缘材料2. (1)current(2)circuit(3)charge(4)conductors(5)Transistors3. (1)which ---atoms(2)it---balloon(3)it---The unit of voltage, or potential difference(4)which---a wall or the ceiling(5)it---the charge of an electron is a negative one of 1.60218x10-19 coulombs4. (1)constitute(2)consists of(3)is composed of(4)makes up(5)constitute5. (1) Resistors can reduce the flow of current.(2) Capacitors consist of two pieces of conducting materials separated by a non-conducting material called a dielectric.(3)The function of a transistor is similar to a switch.Unit 2 SemiconductorExercises1．(1)集成电路(2)半导体的导电性(3)positive type material semiconductor(4)forward bias(5)每秒可完成上百万的简单指令操作2．(1)---(a)(2)---(c)(3)---(b)(4)---(e)(5)---(d)3. (1)√(2)x (3)x (4)√ (5) √4.(1)只要加很小的电压就能让电流流动的材料称为导体。

一、根据英文单词写出中文词义（每题1分共20分）semiconductor 半导体power consumption 功耗flip flop 触发器low pass 低通micron 微米assembly language 汇编语言transient response 瞬态响应quality factor 品质因子power supply 电源10．load current 负载电流11. flux 通量12. dielectric 介电的13. decibel 分贝14. duty cycle 占空比15. antenna 天线16. simulation 模拟17. order of magnitude 数量级18. buffer 缓冲器19. full-custom 全定制20. synthesis 综合二、根据中文词义写出英文单词（每题1分共20分）1. 电压源voltage source 2．晶体管transistor 3．频率frequency 4．可靠性reliability 5．矢量vector6．复位reset7．乘法multiplication8．振荡器oscillator9．锁存器latch10．滤波器filter11．电感inductance12．电容capacitance13．寄存器register14．负反馈negative feedback15．串联series16．混叠aliasing17．周期period18．原理图schematic19．整流器rectifier20．总线bus三、完形填空（共20分）What is a filter? A filter is a device that passes electric signals __at_ certain frequencies or frequency ranges __while_ preventing the passage of others.Filter circuits are used ___in____ a wide variety of applications. In the filed of telecommunication (在电信领域),band-pass filters are used in the audio frequency range (0kHz to 20kHz) for __modem and speech processing__ (调制解调器和语音处理).High-frequency band-pass filters(several hundred MHz) are used for ____channel selection_ (信道选择)in telephone central offices. Data acquisition systems usually require _anti-aliasing low-pass filters__（抗混叠低通滤波器) as well as low-pass noise filters in their preceding __signal conditioning_ (信号调理)stages. System power supplies often use band-rejection filters to suppress the 60-Hz frequency and high frequency transients. In addition, there are filters that do not filter_ (滤除)any frequencies of a complex input signal, but just add a ___linear phase shift__ (线性相移)to each frequency component，thus contributing a constant __time delay__（时延）.These are called ___all-pass filter__ (全通滤波器).At high frequencies (>1 MHz), all of these filters usually consist __of_ passive components __such as__ inductors (L), resistors (R), and capacitors(C). They are then __called______ LRC filters. In the low frequency range (1 Hz to 1 MHz), however,the inductor value becomes very large and the inductor itself gets quite bulky, ___making__ economical production difficult. In these _cases_____, _active filters_ (有源滤波器) becomes important. Active filters are circuits that use _operational amplifier__ (运算放大器) as the active device ___in__ combination with some resistors and capacitors to provide an LRC-like filter performance at low frequency.四. 翻译（每题5分共40分）1．Compared to the vacuum tube, transistors were much smaller, faster, and cheaper to manufacture. They were also far more reliable and used much less power.与真空管相比，晶体管小得多，快得多，成本低得多。

电子技术试题答案一，选择题1.A C2.C3.A4.D5.D二，填空1.带阻2.饱和导通和截止3.组合逻辑电路，时序逻辑电路4.带通5.同相，反相6.与运算，或运算，非运算7.同步时序逻辑电路，异步时序逻辑电路三，判断1.X2.✔3.✘4.✔5.✘6.✘7.✘8.✔9.✘ 10.✘四，问答1.2.电路如图所示，已知稳压管的稳定电压为6V ，最小稳定电流为5mA ，允许耗散功率为240mW ；输入电压为20～24V ，R 1＝360Ω。

试问：（1）为保证空载时稳压管能够安全工作，R 2应选多大？（2）当R 2按上面原则选定后，负载电阻允许的变化范围是多少？解：R 1中的电流和稳压管中的最大电流为mA 40mA 50~39ZM max1Z I 1==≈-=Z Z R U P I R U U I （1） 为保证空载时稳压管能够安全工作Ω=-=600)(max max 12Z R Z I I U R（2） 负载电流的最大值mA 24min 2min 1Lmax =-=Z R R I I I I －负载电阻的变化范围∞=Ω==Lmin Lmax Lmin 250R I U R Z3. 在下图所示稳压电路中，已知稳压管的稳定电压U Z 为6V ，最小稳定电流I Z m i n 为5mA ，最大稳定电流I Z m a x 为40mA ；输入电压U I 为15V ，波动范围为±10％；限流电阻R 为200Ω。

（1）电路是否能空载？为什么？（2）作为稳压电路的指标，负载电流I L 的范围为多少？解：（1）由于空载时稳压管流过的最大电流mA 40mA 5.52max Z Z ax Im max max D Z ==-==I R U U I I R ＞ 所以电路不能空载。

（2）根据m a x L I m i n m i n D Z I RU U I Z --=，负载电流的最大值 mA 5.32min D Imin max L Z =--=I R U U I Z 根据m i n L I m a x m a x D Z I RU U I Z --=，负载电流的最小值 mA 5.12max D Imax min L Z =--=I R U U I Z 所以，负载电流的范围为12.5～32.5mA 。