电子信息技术专业英语试题卷(可编辑修改word版)
(完整版)电子信息专业英语试卷B
一、根据英文单词写出中文词义(每题1分共20分)silicon 硅2 power dissipation 功耗3 flip flop 触发器4 base band 基带5 micron 微米6 assembly language 汇编语言7 transient response 瞬态响应8 quality factor 品质因子9 power supply 电源10. quantization level 量化电平11. undersampling 欠采样12. dielectric 介电的13. decibel 分贝14. duty cycle 占空比15. transducer 传感器16. emulation 仿真17. power-up 加电18. buffer 缓冲器19. semi-custom 半定制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. 电流源current source2.晶体管transistor3.周期period4.稳定性stability5.矢量vector6.复位reset7.除法division8.振荡器oscillator9.锁存器latch10.滤波器filter11.电感inductance12.电容capacitance13.寄存器register14.正反馈positive feedback15.并联parallel16.谐振resonance17. 晶体crystal18.原理图schematic19.整流器rectifier20.增益gainWhat 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. As in the first-order case, the second-order low-pass transfer function tends to zero as frequency tends to infinity.当频率趋近于无穷时,二阶低通滤波器的传输函数趋近于零(和一阶低通滤波器的传输函数一样)。
《电子信息专业英语》课程期末考试卷(A卷)
《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。
(完整word版)计算机专业英语试题
计算机专业英语试题I.V ocabulary(词汇)(30分)(一)Translate the following words and expressions into Chinese.(写出下列词组的汉语。
共10分,每题1分)1.Operating system____________2.white bOx testing__________3.hard disk_________4.management information system_______________5.electronic commerce___________________6.relational database__________________7.software engineering___________________8.software maintenance__________________9.menu bar______________10. network security___________________(二)Fill in the blank swith the corresponding English abbreviations.(根据汉语写出相应的英语缩写。
共10分,每题1分)1.只读存储器__________ 2.广域网___________3.传输控制协议___________ 4,文件传送[输]协议__________5.通用串行总线__________ 6.面向对象编程____________7.集成开发环境___________ 8.结构化查询语言___________9.数据库管理系统___________ 10.开放系统互连______(三)Match the following words and expressions in the left column with those similar in meaning in the right column.(将左列的词汇与右列相应的汉语匹配。
电子信息技术专业英语试卷A卷
(.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。
电子信息专业英语试卷1
电子信息专业英语期末考试试卷(一)(考试时间120分钟,满分100分)一、词汇测试题(共25道题,每小题1分,总计25分)(一).Translate the following words and expressions into Chinese (写出下列词组的汉语意思。
)(共25分,每题1分,总计25分)1. resistor 2. capacitor 3. inductor 4. resistance 5. capacitance 6. inductance . 7.Dielectric8. frequency9.electromotive force (emf )10. Electronics 11. Electricity12. electron 13. Diode14. Transistor 15. Circuit 16. Vacuum 17. semiconductor 18. silicon 19. chip20. microminiaturization 21. Microelectronics 22. integrated circuit 23. Negative 24. Positive 25. Cell(共25题,每题1分,总计25分)1.黑白电视机2.基本原理3.硅晶体管4.电子元件5. 锗晶体管6. 真空二极管7. 信息时代 8. 单片 9.电源 10.负极 11.正极 12.干电池 13.串联 14.并联 15.电压降16.固定电阻 17.电阻值18.电场 19.容抗 20. 对电流的阻力21. 非线性电阻23.一个二端元件24.一个闭合回路 25. 事实上(三)填空题Choose one word from the word list below to fill in the blank in each of the following sentences. Change the form of the word where necessary: (共8道题,每题1分,总计8分)resistors capacitance nonlinear resistance electricity inductor electrical capacitor1. Capacitor’s basic function is to store _____ energy.2. A _____ is a device designed to have capacitance.3. The property of a capacitor to oppose any change in voltage across that capacitor is called ______.4. Resistors used for special applications are ______.5. Ohm is used as a unit of ______.6. Some _____ are made to have a variable resistance.7. The larger is the emf, the more ______ the capacitor stores. 8. Any _____ is made of wire having resistance.(四)单项选择题Choose the one that best completes each of the following statements according to the text: (共12题,每题1分,共12分)1. Electronics is a part of _______.A. electronsB. technologyC. electricityD. science2. The field of electronics includes _____.A. transistorB. electron tubeC. integrated circuitD. All above3. Thomas Edison invented ______ in 1883.A. vacuum tubeB. diodeC. triodeD. lamp4. The first transistors were made from ______.A. siliconB. germaniumC. copperD. gold5. ______ created a new future in electronics.A. Integrated circuitB. SemiconductorC. Electron tubeD. Computer6. Due to the invention of ______, microelectronics was created in 1950s.A. electron tubeB. transistor 7. Power supply, the conductor, the control device and ______ are fourbasic parts of an electric circuit.A. batteryB. wireC. switchD. load8. The energy conversion can take place _______.A. in the circuitB. in a cellC. within the loadD. along the wire9. Electric circuit is a combination of a conductor and of a source of e.m.f.which permits electrons to flow along a ______.A. streamB. wireC. terminalD. pathway10. The electrons move in a fixed way in a _____ direction.A. definiteB. differentC. variousD. appropriate11. The electric current flows from ______ to ______.A. negative , positiveB. positive, negativeC. minus, plusD. A and C12. When the current flows, it is a ______ circuit.A. closedB. openC. combinationD. electric(五)翻译题(共10题,每题2分,总计20分)1. Each lamp filament representing an independent path from the minus main wire to the plus wire.2. Silicon transistors began to replace germanium transistors in the late 1950s, which made possible the next revolutionary step in electronics.3. Electronics began in 1883, when Thomas Edison discovered the vacuum diode as part of his research on materials for a practical electric light. proportional to the current passing through it.5. Such circuits make it possible to combine the different voltage characteristic of a series circuit with the different current characteristic of a parallel circuit within a single network.6. Jack Kilby, an American scientist, made the first single IC in the late 1950s, which laid foundation of microminiaturization and integration.7. Digital computers are essentially machines for recording numbers, operating with numbers and giving the result in numerical forms.8. Integrated circuits are more of a science, than of a technology.9. Bandwidth of transistor amplifiers vary from about 250 MHz in the L band to 1000 MHz in the X band.10. The main device failure mode is secondary breakdown。
电子技术专业英语试卷( B )及答案
电子技术专业英语试卷( B )及答案一、选择题(每小题2 分,共20 分)1.The sixth power of two is .A. 12B. 36C. 642. 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. resistsC. changes4. “The current is directly proportional to the voltages across it.”These can be described by formula _______.A. I=u/RB. p=u*IC. I=q/t5. The algebraic sum of the ________ entering any node is zero.A. currentB. reactanceC. voltage6. The conductivity of semiconductors is ______ than that of insulator but ________ than that of conductors.A. lower…lowerB. lower…higherC. higher….lower 7. 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. diodeB. conductorC. transistor9. 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二、搭配题(每小题2分,共20 分)1.模拟电子技术()2.直流电路()3.电子元件()4.机械调节()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)analog electronics (6)logic operation (7)external resistance (8)number systems (9)direct current circuits (10)amplifier(11)mechanical adjust (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. Specific meters4. Analog multimeter5. Semiconductor material6. Forward biased7. peak-to-peak voltage8. under this circumstance9. demodulating equipment10. Ohm's law四、句子翻译(每小题5 分,共20 分)1.The amount of current (I) flowing in a resistor is directly proportional to the voltage across it and inversely proportional to the resistance of the resistor.2. A multimeter is a general-purpose meter capable of measuring DC and AC voltage, current, resistance, and in some cases, decibels.3. The motherboard is the main circuit board inside the PC which holds the processor, memory and expansion slots and connects directly or indirectly to every part of the PC(Fig 9.1).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 than 10. 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)《电子技术专业英语》答案选择题(每小题2 分,共20 分)答:C A B A A C B C A略三、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. Specific meters 特种仪表(专用仪表)4. Analog multimeter 模拟万用表5. Semiconductor material 半导体材料6. Forward biased 正向偏压7. peak-to-peak voltage 电压峰-峰值8. under this circumstance 在这种情况下9. demodulating equipment 解调装置10. Ohm's law 欧姆定律四、句子翻译(每小题5 分,共20 分)1. The amount of current (I) flowing in a resistor is directlyproportional to the voltage across it4 / 4 and inversely proportional to the resistance of the resistor.流过一个电阻的电流量与加在电阻两端的电压成正比,与电阻的阻值成反比。
电子信息专业英语试卷1
电子信息专业英语期末考试试卷(一)(考试时间120分钟,满分100分)一、词汇测试题(共25道题,每小题1分,总计25分)(一).Translate the following words and expressions into Chinese (写出下列词组的汉语意思。
)(共25分,每题1分,总计25分)1. resistor 2. capacitor 3. inductor 4. resistance 5. capacitance 6. inductance . 7.Dielectric8. frequency9.electromotive force (emf )10. Electronics 11. Electricity12. electron 13. Diode14. Transistor 15. Circuit 16. Vacuum 17. semiconductor 18. silicon 19. chip20. microminiaturization 21. Microelectronics 22. integrated circuit 23. Negative 24. Positive 25. Cell(共25题,每题1分,总计25分)1.黑白电视机2.基本原理3.硅晶体管4.电子元件5. 锗晶体管6. 真空二极管7. 信息时代 8. 单片 9.电源 10.负极 11.正极 12.干电池 13.串联 14.并联 15.电压降16.固定电阻 17.电阻值18.电场 19.容抗 20. 对电流的阻力21. 非线性电阻23.一个二端元件24.一个闭合回路 25. 事实上(三)填空题Choose one word from the word list below to fill in the blank in each of the following sentences. Change the form of the word where necessary: (共8道题,每题1分,总计8分)resistors capacitance nonlinear resistance electricity inductor electrical capacitor1. Capacitor’s basic function is to store _____ energy.2. A _____ is a device designed to have capacitance.3. The property of a capacitor to oppose any change in voltage across that capacitor is called ______.4. Resistors used for special applications are ______.5. Ohm is used as a unit of ______.6. Some _____ are made to have a variable resistance.7. The larger is the emf, the more ______ the capacitor stores. 8. Any _____ is made of wire having resistance.(四)单项选择题Choose the one that best completes each of the following statements according to the text: (共12题,每题1分,共12分)1. Electronics is a part of _______.A. electronsB. technologyC. electricityD. science2. The field of electronics includes _____.A. transistorB. electron tubeC. integrated circuitD. All above3. Thomas Edison invented ______ in 1883.A. vacuum tubeB. diodeC. triodeD. lamp4. The first transistors were made from ______.A. siliconB. germaniumC. copperD. gold5. ______ created a new future in electronics.A. Integrated circuitB. SemiconductorC. Electron tubeD. Computer6. Due to the invention of ______, microelectronics was created in 1950s.A. electron tubeB. transistor 7. Power supply, the conductor, the control device and ______ are fourbasic parts of an electric circuit.A. batteryB. wireC. switchD. load8. The energy conversion can take place _______.A. in the circuitB. in a cellC. within the loadD. along the wire9. Electric circuit is a combination of a conductor and of a source of e.m.f.which permits electrons to flow along a ______.A. streamB. wireC. terminalD. pathway10. The electrons move in a fixed way in a _____ direction.A. definiteB. differentC. variousD. appropriate11. The electric current flows from ______ to ______.A. negative , positiveB. positive, negativeC. minus, plusD. A and C12. When the current flows, it is a ______ circuit.A. closedB. openC. combinationD. electric(五)翻译题(共10题,每题2分,总计20分)1. Each lamp filament representing an independent path from the minus main wire to the plus wire.2. Silicon transistors began to replace germanium transistors in the late 1950s, which made possible the next revolutionary step in electronics.3. Electronics began in 1883, when Thomas Edison discovered the vacuum diode as part of his research on materials for a practical electric light. proportional to the current passing through it.5. Such circuits make it possible to combine the different voltage characteristic of a series circuit with the different current characteristic of a parallel circuit within a single network.6. Jack Kilby, an American scientist, made the first single IC in the late 1950s, which laid foundation of microminiaturization and integration.7. Digital computers are essentially machines for recording numbers, operating with numbers and giving the result in numerical forms.8. Integrated circuits are more of a science, than of a technology.9. Bandwidth of transistor amplifiers vary from about 250 MHz in the L band to 1000 MHz in the X band.10. The main device failure mode is secondary breakdown。
电子信息专业英语复习题
1)As the voltage varies with time, the displacement of charge also varies with time, causing what is known as the displacement current. 当电压随时间的变化、位移电荷也随时间的变化而变化,造成所谓的位移电流。
2)The device capable of doing this is called a capacitor. The ability of a capacitor to store electrical energy is termed capacitance.该装置能做这项被称为电容。
电容器的能力储存电能被称为电容。
3)Resistance is the capacity of materials to impede the flow of current or, more specifically, the flow of electric charge.电阻是材料的能力来阻碍电流的流动,或者更确切地说,电荷的流动。
4)Second, a current cannot change instantaneously in an inductor, that is, the current cannot change by a finite amount in zero time.第二,电流不能改变瞬间在一个电感,也就是说,当前无法改变由有限零时间。
5)Inductance is the property of oppsing any change of a current flowing through a coil.电感的属性相对任何一个线圈通过电流的变化。
Oppsing:adj. 反对的;相对的;对面的| v. 反对6. Note from Eq(1.4) that the voltage across the terminals of an inductor is proportional to the time rate of change of the current inthe inductor.注意从式(1.4)的电压,一个电感的连接端子是成正比的变率的电感电流。
电子科技大学大三电子信息专业通信原理英文考试卷及答案 (4)
学院_______________________ 系别____________ 班次_____________ 学号__________ 姓名________________………….……密…..……….封……..……线………..…以………..…内………....答…………...题…………..无…….….效…..………………..电子科技大学 二0x 至二0x 学年 第 学期<< 通信原理 >> 课程考试题(A 卷) (120分钟) 考试日期 20xx 年 1 月 14 日1. (16 Points) Blank Filling:1) The PSD of a baseband signal s(t) is shown in the following figure, the absolute bandwidth,3dB bandwidth and first zero-crossingbandwidth is____________, _______________ and ________________ respectively,________________ and ________________.4) If the analog signal is )40002cos()42sin()(t t t s ⨯+⨯=ππ, the minimum sampling rate is ________________.5) If the data rate is 50kbps, the first null bandwidth for the unipolar NRZ signal, the polar NRZ signal and the Manchester NRZsignal are______________, ______________, ______________ separately.6) For no ISI, and the symbol rate of communication system is 50 kbaud , the 6 dB bandwidth of the raised cosine-rolloff filter, f 0,should designed to be _________ .7) If the modulated signal )100002cos()]42cos(5.01[5)(t t t s ⨯⨯+=ππ, its complex envelope is ____________.8) Assume that the input signals is T)]-U(t -][U(t)cos [)(0t e t s at ω-=. When the input noise is white, the impulse response of thematched filter h(t)=_________________________________and the optimum sampling time =0t ___________________________. 1 5MHz, 3.5MHz , 4MHz2 Sampling, quantizing, encoding3 Channel receiver4 8kHz5 50kHz, 50kHz, 100kHz 625kHz7 )]42cos(5.01[5)(t t g ⨯+=π8 U(-t)]-t)-][U(T cos [)(0)(t e t h t T a ω--= t0=TIMPORTANT NOTICE: Among the following 7 questions, you are required to answer any 6 of them. Make sure you CROSS the one you will NOT select.(重要提醒:下面7题中只需选择6题,并记住在你不做的题号上划叉) 2. (9 Points) The transmission system is shown as following. The bandwidth of the baseband analog signal m(t) is 15kHz. Assumethat the peak SNR of receiver output is 50 dB. Find (a) the minimum sampling rate fs;(b) the minimum number of bits in the PCM word; (c) the minimum data rate of the digital signal s(t)Solution:(a) 332215103010S f B Hz ==⨯⨯=⨯(b) 6.02 4.77pk SNR n =+( 4.77)/6.02(50 4.77)/6.027.5pk n SNR =-=-≈ Because n is an integer, we have n=8. (c) 338301024010S R nf bps ==⨯⨯=⨯3. (9 Points)Consider a random data pattern consisting of binary 1’s and 0’s, where the probability o f obtaining either a binary 1 orbinary 0 is 1/2. Assume that these data are encoded into a polar-type waveform such that the pulse shape of each bit is given by/2102()10/2b b b t T t f t t T T ≤⎛⎫⎧=∏=⎨⎪>⎩⎝⎭where b T is the time needed to send one bit. Find the expression for the PSD of this waveform. Solution:()()22()5/21 k=0()[]0 k 0|()|()(0)25/2b b n n k b b b F f T Sa fT R k E a a F f f R T Sa fT T πψπ+=⎧==⎨≠⎩==4. (9 Points)Assume that an AM modulated signal ist t t t s a c c a c )sin(100cos 500)sin(100)(ωωωωω--++= Where the un-modulated carrier is t c ωcos 500(a) Find the complex envelope for the modulated signal. (b) Write the expression for the modulating signal m(t).(c) What are the percentages of positive and negative modulation (d) Evaluate the average power of the modulated signalSolution:(a)tt t t t tt t t s c a a c c a c c a c ωωωωωωωωωωcos )sin 200500(sin cos 200cos 500)sin(100cos 500)sin(100)(+=+=--++=)sin 4.01(500sin 200500)(t t t g a a ωω+=+= (b) t t m a ωsin 4.0)(=(c) percentages of positive modulation :%405005004.1500=-⨯;percentages of negative modulation :%405006.0500500=⨯- (d) w t g P av 1350)24.01(50021)(21222=+⨯==5. (9 Points)An angle-modulation system is indicated in Fig.Where D p is the phase sensitivity of the phase modulator, the carrier frequency Hz f c 410=, if the modulated waveform s ( t ) is given by:)2000sin 21102cos(100)(4t t t s ππ+⨯=(a) For modulating signal m ( t ), determine whether s ( t ) is a phase modulating wave or frequency modulating wave;(b) Find the expression of m ( t );(c) Find the maximum phase deviation and maximum frequency deviation; (d) Find the transmission bandwidth by using Carson’s rule.Solution:(a) ])(cos[)](cos[)(⎰∞-+=+=tp c c p p c c d m D t A t m D t A t s ττωω∴ s ( t ) is a frequency modulated wave.(b) t d m D t tp πττθ2000sin 21)()(==⎰∞- → t t m ππ2000cos 200)(= (c) 21)](max[==∆t θθ ; Hz t dt d F 500]2000sin 21[21max =⎭⎬⎫⎩⎨⎧=∆ππ (d) Hz f F B B m f FM 3000)1000500(2)(2)1(2=+=+∆=+=β6.(9 Points)Assume that the channel bandwidth could be used is 1000~4000Hz, the carrier frequency is 2500Hz. (a) if DPSK modulation and 0.2r = raised cosine-rolloff filter is used, find the maximum data rate could be supported.(b) if QPSK modulation and 5.0=r raised cosine-rolloff filter is used, find the maximum data rate could be supported.Solution:400010003000T B Hz =-=2(1)(1)1T T basebandlB RB B D r r R l r==+=+⇒=+(a) for DPSK130002500/110.2T lB R b s r ⨯===++(b) for QPSK 230004000/110.5T lB R b sr ⨯===++7.(9 Points)Assume that 9600/R bit s =.For rectangular data pulses, (a) (1)calculate the first null-to-null bandwidth of OOK.(b) (2)calculate the first null-to-null bandwidth of 16QAM. Solution:(a)()22219.2T basebandOOKRB B D kHz l====(b) ()16222 4.8T baseband QAM RB B D KHz l ==⋅==8. (9 Points)Suppose that a 2FSK system with non-coherent detector has a BER of 5210-⨯ at 0/b E N of 13dB. (a) With the same 0/b E N , what is BER for coherent detection?(b) To obtain the same BER, what is the 0/b E N when non-coherent OOK system is used? Solution: (9分)(1)For coherent-2FSK,e P Q Q ==(2) While OOK and 2FSK signals have the same BER-formula, so 0/b E N is the same, 13dB.。
电子信息工程专业专业英语考卷
电子信息工程专业《专业英语》课程期末考试试题专业、班级:姓名:学号:共 6 页第 1 页三、根据英文缩写写出中文含义(每题 0.5 分,二十个小题,共 10 分)1). CDMA2). ALU3). DAS4). HLL5). SCR6). I/O7). MIPS8). MMX9). DCS10). HDD11). PLA12). VSWR13). DC14). FDM15). GBW16). TDM17). IP18). DCT19). MRI20). PCM四、将下列句子翻译为中文(每题 2 分,五个小题,共 10 分)1). At present, the state of most semiconductor device technology is such that the device design and process technology must be supplemented by screening and inspection procedures, if ultimate device reliability is to be obtained and controlled.2). The converter is essentially a highly over –sampling 1-bit ADC (the comparator) followed by digital filtering and decimation to realize the processing gain. The effective performance of the converter is greatly enhanced by the addition of circuitry to shape the quantization noise such that, instead of being uniformly spread throughout the 0 to fs/2 band, it is minimized in the band of interest.3). Although the individual integrated circuits might cost as little as 10 cents each, the cost of designing the printed circuit board for such a system and the cost of assembling the board are very significant and this design style is no longer cost-effective.4). Rather than just matching the abilities of the human ear, these systems are designed to exceed the limits of hearing. It's the only way to be sure that the reprod uced music is pristine.5). In the case that the object types in a video sequence belong to known object classes, knowledge-based coding can be employed, which uses a wireframe specially designed to describe the recognized object type. Several approaches have been developed to code human heads using predefined wireframes. Using a predefined wireframe increases coding efficiency because it is adapted to the shape of the object. Sometimes. this technique is also referred to as model based coding.五、将下列句子翻译为相应的英文(每题 3 分,五个小题,共 30 分)1). 在测量应用中,选择合适的探头是获得最佳信号保真度的关键。
电子信息技术专业英语5 重修复习
《电子信息技术专业英语》(英语5)重修复习试卷(考试时间90分钟)一、单词拼写(15%)1. 电子9. 种类2. 导电性10. 可获得的3. 性质,特性11. 包裹,管壳4. 衬底12. 内在的,国内的5. 成分,元件13. 开关6. 条纹14. 完成7. 减少,缩减量15 . 物质8. 消耗,分散二、翻译下列专业术语(20%)1. electronic counter 6.自由电子2. frequency synthesizer 7.正向偏置3. digital instrument 8.反向输入端4. operational amplifier 9.8管脚双列直插式5. digital electronics 10.数字逻辑门三、句子翻译(30%)1.Atom is composed of an nucleus and electrons moving in orbit aboutit.2.The electrically interconnected component that make up an IC arecalled integrated elements.3.The invention of IC is a great revolution in the electronic industry, sharp size, weight reduction are possible with these techniques.4.The operational amplifier is the most important basic building block of alllinear circuits.5.Any logic function can be performed by the three basic gates that havebeen described.6.电动势可对电荷做功。
惠州学院电子信息专业英语考试试卷
惠州学院电子信息专业英语考试试卷一、听力第一节(共5小题,每小题1分)听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的'相应位置。
听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1、Who is the man talking about now?A.His girlfriend.B.His sister.C.His mother.2、What are they talking about?A.A traffic accident.B.A fire.C.A crime.3、Where does the conversation most probably take place?A.At a bookshop.B.At a kitchen.C.At a bank.4、Who was injured?A.George.B.George’s wife.C.George’s wife’s father.5、What do we learn from the conversation?A.Tony could not continue the experiment.B.Tony finished the experiment last night.C.Tony will go on with his experiment.第二节(共15小题,每小题1分)听下面5段对话或独白。
每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。
每段对话或独白读两遍。
听第6段材料,回答第6至7题。
6、Where does this conversation most likely take place?A.In the street.B.At the woman’s home.C.Over the phone.7、What is the woman going to do tonight?A.Help her sister with English.B.Meet her friend at the station.C.Go to an exhibition with her parents.听第7段材料,回答第8至10题。
电子科技英语试题及答案
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。
英语电子技术英语40题
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)”。
(完整版)电子信息技术专业英语试题卷
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%)。
电子信息工程专业英语教程_第5版 题库
《电子信息工程专业英语教程(第5版)》题库Section A 术语互译 (1)Section B 段落翻译 (5)Section C阅读理解素材 (12)C.1 History of Tablets (12)C.2 A Brief History of satellite communication (13)C.3 Smartphones (14)C.4 Analog, Digital and HDTV (14)C.5 SoC (15)Section A 术语互译Section B 段落翻译Section C阅读理解素材C.1 History of TabletsThe idea of the tablet computer isn't new. Back in 1968, a computer scientist named Alan Kay proposed that with advances in flat-panel display technology, user interfaces, miniaturization of computer components and some experimental work in WiFi technology, you could develop an all-in-one computing device. He developed the idea further, suggesting that such a device would be perfect as an educational tool for schoolchildren. In 1972, he published a paper about the device and called it the Dynabook.The sketches of the Dynabook show a device very similar to the tablet computers we have today, with a couple of exceptions. The Dynabook had both a screen and a keyboard all on the same plane. But Key's vision went even further. He predicted that with the right touch-screen technology, you could do away with the physical keyboard and display a virtual keyboard in any configuration on the screen itself.Key was ahead of his time. It would take nearly four decades before a tablet similar to the one he imagined took the public by storm. But that doesn't mean there were no tablet computers on the market between the Dynabook concept and Apple's famed iPad.One early tablet was the GRiDPad. First produced in 1989, the GRiDPad included a monochromatic capacitance touch screen and a wired stylus. It weighed just under 5 pounds (2.26 kilograms). Compared to today's tablets, the GRiDPad was bulky and heavy, with a short battery life of only three hours. The man behind the GRiDPad was Jeff Hawkins, who later founded Palm.Other pen-based tablet computers followed but none received much support from the public. Apple first entered the tablet battlefield with the Newton, a device that's received equal amounts of love and ridicule over the years. Much of the criticism for the Newton focuses on its handwriting-recognition software.It really wasn't until Steve Jobs revealed the first iPad to an eager crowd that tablet computers became a viable consumer product. Today, companies like Apple, Google, Microsoft and HP are trying to predict consumer needs while designing the next generation of tablet devices.C.2 A Brief History of satellite communicationIn an article in Wireless World in 1945, Arthur C. Clarke proposed the idea of placing satellites in geostationary orbit around Earth such that three equally spaced satellites could provide worldwide coverage. However, it was not until 1957 that the Soviet Union launched the first satellite Sputnik 1, which was followed in early 1958 by the U.S. Army’s Explorer 1. Both Sputnik and Explorer transmitted telemetry information.The first communications satellite, the Signal Communicating Orbit Repeater Experiment (SCORE), was launched in 1958 by the U.S. Air Force. SCORE was a delayed-repeater satellite, which received signals from Earth at 150 MHz and stored them on tape for later retransmission. A further experimental communication satellite, Echo 1, was launched on August 12, 1960 and placed into inclined orbit at about 1500 km above Earth. Echo 1 was an aluminized plastic balloon with a diameter of 30 m and a weight of 75.3 kg. Echo 1 successfully demonstrated the first two-way voice communications by satellite.On October 4, 1960, the U.S. Department of Defense launched Courier into an elliptical orbit between 956 and 1240 km, with a period of 107 min. Although Courier lasted only 17 days, it was used for real-time voice, data, and facsimile transmission. The satellite also had five tape recorders onboard; four were used for delayed repetition of digital information, and the other for delayed repetition of analog messages.Direct-repeated satellite transmission began with the launch of Telstar I on July 10, 1962. Telstar I was an 87-cm, 80-kg sphere placed in low-Earth orbit between 960 and 6140 km, with an orbital period of 158 min. Telstar I was the first satellite to be able to transmit and receive simultaneously and was used for experimental telephone, image, and television transmission. However, on February 21, 1963, Telstar I suffered damage caused by the newly discovered Van Allen belts.Telstar II was made more radiation resistant and was launched on May 7, 1963. Telstar II was a straight repeater with a 6.5-GHz uplink and a 4.1-GHz downlink. The satellite power amplifier used a specially developed 2-W traveling wave tube. Along with its other capabilities, the broadband amplifier was able to relay color TV transmissions. The first successful trans-Atlantic transmission of video was accomplished with Telstar II , which also incorporated radiation measurements and experiments that exposed semiconductor components to space radiation.The first satellites placed in geostationary orbit were the synchronous communication (SYNCOM ) satellites launched by NASA in 1963. SYNCOM I failed on injection into orbit. However, SYNCOM II was successfully launched on July 26, 1964 and provided telephone, teletype, and facsimile transmission. SYNCOM III was launched on August 19, 1964 and transmitted TV pictures from the Tokyo Olympics. The International Telecommunications by Satellite (INTELSAT) consortium was founded in July 1964 with the charter to design, construct, establish, and maintain the operation of a global commercial communications system on a nondiscriminatory basis. The INTELSAT network started with the launch on April 6, 1965, of INTELSAT I, also called Early Bird. On June 28, 1965, INTELSAT I began providing 240 commercial international telephone channels as well as TV transmission between the United States and Europe.In 1979, INMARSAT established a third global system. In 1995, the INMARSAT name was changed to the International Mobile Satellite Organization to reflect the fact that the organization had evolved to become the only provider of global mobile satellite communications at sea, in the air, and on the land.Early telecommunication satellites were mainly used for long-distance continental and intercontinental broadband, narrowband, and TV transmission. With the advent of broadband optical fiber transmission, satellite services shifted focus to TV distribution, and to point-to-multipoint and very small aperture terminal (VSAT) applications. Satellite transmission is currently undergoing further significant growth with the introduction of mobile satellite systems for personal communications and fixed satellite systems for broadband data transmission.C.3 SmartphonesThink of a daily task, any daily task, and it's likely there's a specialized, pocket-sized device designed to help you accomplish it. You can get a separate, tiny and powerful machine to make phone calls, keep your calendar and address book, entertain you, play your music, give directions, take pictures, check your e-mail, and do countless other things. But how many pockets do you have? Handheld devices become as clunky as a room-sized supercomputer when you have to carry four of them around with you every day.A smartphone is one device that can take care of all of your handheld computing and communication needs in a single, small package. It's not so much a distinct class of products as it is a different set of standards for cell phones to live up to.Unlike many traditional cell phones, smartphones allow individual users to install, configure and run applications of their choosing. A smartphone offers the ability to conform the device to your particular way of doing things. Most standard cell-phone software offers only limited choices for re-configuration, forcing you to adapt to the way it's set up. On a standard phone, whether or not you like the built-in calendar application, you are stuck with it except for a few minor tweaks. If that phone were a smartphone, you could install any compatible calendar application you like.Here's a list of some of the things smartphones can do:•Send and receive mobile phone calls•Personal Information Management (PIM) including notes, calendar and to-do list•Communication with laptop or desktop computers•Data synchronization with applications like Microsoft Outlook•E-mail•Instant messaging•Applications such as word processing programs or video games•Play audio and video files in some standard formatsC.4 Analog, Digital and HDTVFor years, watching TV has involved analog signals and cathode ray tube (CRT) sets. The signal is made of continually varying radio waves that the TV translates into a picture and sound. An analog signal can reach a person's TV over the air, through a cable or via satellite. Digital signals, like the ones from DVD players, are converted to analog when played on traditional TVs.This system has worked pretty well for a long time, but it has some limitations:•Conventional CRT sets display around 480 visible lines of pixels. Broadcasters have been sending signals that work well with this resolution for years, and they can't fit enough resolution to fill a huge television into the analog signal.•Analog pictures are interlaced - a CRT's electron gun paints only half the lines for each pass down the screen. On some TVs, interlacing makes the picture flicker.•Converting video to analog format lowers its quality.United States broadcasting is currently changing to digital television (DTV). A digital signal transmits the information for video and sound as ones and zeros instead of as a wave. For over-the-air broadcasting, DTV will generally use the UHF portion of the radio spectrum with a 6 MHz bandwidth, just like analog TV signals do.DTV has several advantages:•The picture, even when displayed on a small TV, is better quality.• A digital signal can support a higher resolution, so the picture will still look good when shown on a larger TV screen.•The video can be progressive rather than interlaced - the screen shows the entire picture for every frame instead of every other line of pixels.•TV stations can broadcast several signals using the same bandwidth. This is called multicasting.•If broadcasters choose to, they can include interactive content or additional information with the DTV signal.•It can support high-definition (HDTV) broadcasts.DTV also has one really big disadvantage: Analog TVs can't decode and display digital signals. When analog broadcasting ends, you'll only be able to watch TV on your trusty old set if you have cable or satellite service transmitting analog signals or if you have a set-top digital converter.C.5 SoCThe semiconductor industry has continued to make impressive improvements in the achievable density of very large-scale integrated (VLSI) circuits. In order to keep pace with the levels of integration available, design engineers have developed new methodologies and techniques to manage the increased complexity inherent in these large chips. One such emerging methodology is system-on-chip (SoC) design, wherein predesigned and pre-verified blocks often called intellectual property (IP) blocks, IP cores, or virtual components are obtained from internal sources, or third parties, and combined on a single chip.These reusable IP cores may include embedded processors, memory blocks, interface blocks, analog blocks, and components that handle application specific processing functions. Corresponding software components are also provided in a reusable form and may include real-time operating systems and kernels, library functions, and device drivers.Large productivity gains can be achieved using this SoC/IP approach. In fact, rather than implementing each of these components separately, the role of the SoC designer is to integrate them onto a chip to implement complex functions in a relatively short amount of time.The integration process involves connecting the IP blocks to the communication network, implementing design-for-test (DFT) techniques and using methodologies to verify and validate the overall system-level design. Even larger productivity gains are possible if the system is architected as a platform in such as way that derivative designs can be generated quickly.In the past, the concept of SoC simply implied higher and higher levels of integration. That is, it was viewed as migrating a multichip system-on-board (SoB) to a single chip containing digital logic, memory, analog/mixed signal, and RF blocks. The primary drivers for this direction were the reduction of power, smaller form factor, and lower overall cost. It is important to recognize that integrating more and more functionality on a chip has always existed as a trend by virtue of Moore’s Law, which predicts that the number of transistors on a chip will double every 18-24 months. The challenge is to increase designer productivity to keep pace with Moore’s Law. Therefore, today’s notion of SoC is defined in terms of overall productivity gains through reusable design and integration of components.。
电子信息专业英语考试
1)The term modem is derived from the wordsd
a.modulate emphasis b. modular emulation
c.multiplex or demultiplex d. modulate demodulate
f)An identifier that indicates the location of a record.
g)Protection of a database against access or modification without authorization.
h)Protection of a database against invalid alteration or destruction.
6)PC-to-PC networking could be easily accomplished between buildingsc.
a. on one campusb. between campuses
c. a or bd. none of them
7)In aaswitching system, a call was established and routed in a set of progressive electromechnical steps, each under the direct control of the user’s dialing pulse.
1)bdatabase
2)ddatabase management
system (DBMS)
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班级 学号 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. component
2. device 12. circuit
3. instruction 13. resistor
4. junction 14. capacitor
5. combination 15. diode
6. manufacture 16. transistor
7. structure 17. current
8. principle 18. voltage
9. wafer 19. amplifier 10. analog
20. 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 pure state. ( )
3. A semiconductor of n-type means that the pure material have been added impurities with three outer electrons. ( )
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 and
insulators.
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%)。
班级
学号
姓名
四、回答问题(15%)
1.
2.
3.
4.
5.
五、句子互译(20%)
1.
2.
3.
4.
5.
六、段落翻译(15%)
参考答案一、单词翻译(20%)
1.开关
2.装置
3.指令6.制造7.结构8.原理11. 元件12.电路
4.结
5.结合
9.晶片10.模拟
13.电阻14.电容15.二极管
16.晶体管17.电流18.电压19.放大器20.绝缘体
二、词组互译(20%)
1. be widely used in
2. be classified by``
3. intend to
4. according to
5.apply to
6.refer to
7.consist of
8. act as
9.be known as 10.make up
11.电子电路12.可调电阻13.直流电14.集成电路15.正向偏置
16.N 型材料17.电子计数器18.频率合成器19.数字仪器20.运算放大器
三、判断正误,用“T”或“F” 表示(10%)
TFFTT
四、回答问题(15%)
1.Resistors can restrict the flow of electrons.
2.Diodes can be used to change AC into DC.
3.Transistors can amplify small signal.
4.Material can be divided into conductor, semiconductor, nonconductor.
5.converting information
五、句子互译(20%)
1.晶体管的作用类似一个开关。
2.二极管具有单向导电性。
3.数字集成电路可用于计算机中。
4.集成电路尺寸小,成本低,因此应用范围越来越广。
5.通常物质可分为导体、半导体和绝缘体。
六、段落翻译(15%)(略)。