电工及电子技术知识点英文修订稿
电子课件-《电工英语(第三版)》-A01-3750-电工英语电子课件unit3全文编辑修改
Unit 3
B. Reorder the letters with your partner.
Letters set re ket c so pp su ly s ac ces tec pro t cir cui t n con tai er consum
Unit 3 House Wiring
Lesson7 Reading Diagrams Lesson 8 Installing Entrance Equipment Lesson 9 Installing Cables
Lesson7 Reading Diagrams
Goal Learn useful expressions for using wiring plan
Look and Study Dialogue Reading
Further Study Words and Phrases
Unit 3
Lesson 74
A. Look up the phrases below in a dictionary. Match the symbols with the phrases.
Look and Study Dialogue Reading Further Study Words and Phrases
Unit 3
Lesson 74
Jim（A）初次实际安装总配电箱，向Carole（B）请教安装 要求的问题。
B: This provision is made for people to gain access to the facilities. The equipments include the consumer unit, as it contains devices such as MCB and RCD that may need operation or resetting by the user of the dwelling. A: Oh, I see. B: Is it necessary to have RCD protection? A: Yes. It protects the circuits supplying of socket outlets and the cables buried in the wall. B: OK, I see. Thanks a lot.
电子技术专业英语词汇讲解
Advanced application 高级应用Analytical graph 分析图表Analyze 分析Animations 动画Application software 应用软件Arithmetic operations 算术运算Audio-output device音频输出设备Access time存取时间access存取accuracy准确性ad network cookies广告网络信息记录软件Add-ons附软件Address 地址Agents代理Analog signals 模拟信号Applets 程序Asynchronous communications port 异步通信端口Attachment 附件Bar code条形码Bar code reader条形码读卡器Basic application 基础程序Binary coding schemes 二进制译码方案Binary system 二进制系统Bit比特Browser浏览器Bus line 总线Backup tape cartridge units 备份磁带盒单元Bandwidth 带宽Bluetooth 蓝牙Broadband 宽带Browser浏览器Business-to-business企业对企业电子商务Business-to-consumer 企业对消费者Bus总线Cables连线Cell单元箱Chain printer链式打印机Character and recognition device 字符标识识别设备Chart图表Chassis 支架Chip芯片Clarity清晰度Closed architecture封闭式体系结构Column 歹ijCombination key 结合键computer competency 计算机能力connectivity 连接，结点Continuous-speech recognition system 连续语言识别系统Control unit操纵单元Cordless or wireless mouse 无线鼠标Cable modems有线调制解调器carpal tunnel syndrome腕骨神经综合症CD-ROM可记录光盘CD-RW可重写光盘CD-R可记录压缩光盘Channel 信道Chat group谈话群组chlorofluorocarbons(CFCs)］氯氟甲烷Client客户端Coaxial cable同轴电缆cold site 冷战Commerce servers 商业服务器Communication channel 信道Communication systems 信息系统Compact disc rewritableCompact disc 光盘computer abuse amendments act of 19941994 计算机滥用法案computer crime 计算机犯罪computer ethics计算机道德computer fraud and abuse act of 1986计算机欺诈和滥用法案computer matching and privacy protection act of 1988 计算机查找和隐私保护法案Computer network计算机网络computer support specialist 计算机支持专家computer technician 计算机技术人员computer trainer计算机教师Connection device 连接设备Connectivity 连接Consumer-to-consumer 个人对个人cookies-cutter programs信息记录截取程序cookies信息记录程序cracker解密高手Cybercash电子现金Cyberspace计算机空间Database数据库database files数据库文件Database manager数据库管理Data projector数码放映机Desktop system unit台式电脑系统单元Digital notebooks 数字笔记本Digital bideo camera 数码摄影机Discrete-speech recognition system 不连续语言识别系统document files 文档文件Dot-matrix printer点矩阵式打印机Dual-scan monitor 双向扫描显示器Dumb terminal非智能终端data security数据安全Data transmission specifications 数据传输说明database administrator 数据库管理员Dataplay数字播放器Demodulation 解调denial of service attack 拒绝服务攻击Dial-up service 拨号服务Digital cash数字现金Digital signals 数字信号Digital subscriber line 数字用户线路Digital versatile disc数字化通用磁盘Digital video disc数字化视频光盘Direct access直接存取Directory search 目录搜索disaster recovery plan 灾难恢复计划Disk caching磁盘驱动器高速缓存Diskette 磁盘Distributed data processing system 分部数据处理系统Distributed processing 分布处理Domain code 域代码Downloading 下载DVD数字化通用磁盘DVD-R 可写DVDDVD-RAM DVD随机存取器DVD-ROM 只读DVDEe-book电子阅读器Expansion cards 扩展卡end user终端用户e-cash电子现金e-commerce电子商务electronic cash 电子现金electronic commerce 电子商务electronic communications privacy act of1986 电子通信隐私法案encrypting 力口密术energy star能源之星Enterprise computing 企业计算化environment 环境Erasable optical disks 可擦除式光盘ergonomics人类工程学ethics道德规范External modem外置调制解调器extranet企业外部网FFax machine 传真机Field 域Find搜索FireWire port port 火线端口Firmware 固件Flash RAM 闪存Flatbed scanner台式扫描器Flat-panel monitor 纯平显示器floppy disk 软盘Formatting toolbar格式化工具条Formula 公式Function 函数fair credit reporting act of 1970 公平信用报告法案Fiber-optic cable 光纤电缆File compression 文件压缩File decompression 文件解压缩filter过滤firewall防火墙firewall防火墙Fixed disk固定硬盘Flash memory 闪存Flexible disk可折叠磁盘Floppies 磁盘Floppy disk 软盘Floppy-disk cartridge 磁盘盒Formatting 格式化freedom of information act of 1970 信息自由法案frustrated 受挫折Full-duplex communication 全双通通信General-purpose application 通用运用程序Gigahertz千兆赫Graphic tablet 绘图板greejpc绿色个人计算机handheld computer 手提电脑Hard copy硬拷贝hard disk 硬盘hardware 硬件Help帮助Host computer 主机Home page 主页Hyperlink超链接hacker黑客Half-duplex communication 半双通通信Hard disk 硬盘Hard-disk cartridge 硬盘盒Hard-disk pack 硬盘组Head crash磁头碰撞header标题help desk specialist帮助办公专家helper applications 帮助软件Hierarchical network 层次型网络history file历史文件hits匹配记录horizontal portal 横向用户hot site 热战Hybrid network 混合网络hyperlinks 超连接IImage capturing device 图像获取设备information technology 信息技术Ink-jet printer墨水喷射印刷机Integrated package 综合性组件Intelligent terminal 智能终端设备Intergrated circuit 集成电路Interface cards 接口卡Internal modem内部调制解调器internet telephony 网络电话internet terminal 互联网终端Identification 识另lj i-drive网络硬盘驱动器illusion of anonymity 匿名幻想index search索引搜索information pushers 信息推送器initializing 初始化instant messaging 计时信息internal hard disk 内置硬盘Internal modem内部调制解调器Internet hard drive网络硬盘驱动器Janet企业内部网joystick操纵杆keyword search关键字搜索laser printer激光打印机Layout files版式文件Light pen 光笔Locate定位Logical operations 逻辑运算Lands凸面Line of sight communication 视影通信Low bandwidth 低带宽lurkin冢替伏MMain board 主板Mark sensing标志检测Mechanical mouse 机械鼠标Memory内存Menu菜单Menu bar菜单条Microprocessor 微处理器Microseconds 微秒Modem card调制解调器Monitor显示器Motherboard 主板Mouse鼠标Multifunctional device 多功能设备Magnetic tape reels 磁带卷Magnetic tape streamers 磁带条mailing list邮件列表Medium band媒质带宽metasearch engine整合搜索引擎Microwave 微波Modem解调器Modu1ation 解调Net PC网络计算机Network adapter card 网卡Network personal computer 网络个人电脑Network terminal 网络终端Notebook computer 笔记本电脑Notebook system unit笔记本系统单元Numeric entry数字输入naive天真的人national information infrastructure protection act of1996 国际信息保护法案national service provider全国性服务供应商Network architecture 网络体系结构Network bridge 网桥Network gateway 网关network manager网络管理员newsgroup 新闻组no electronic theft act of1997 无电子盗窃法Node节点Nonvolatile storage非易失性存储Object embedding 对象嵌入Object linking 目标链接Open architecture开放式体系结构Optical disk 光盘Optical mouse光电鼠标Optical scanner光电扫描仪Outline 大纲off-line browsers 离线浏览器Online storage 联机存储Ppalmtop computer 掌上电脑Parallel ports 并行端口Passive-matrix 被动矩阵PC card个人计算机卡Personal laser printer个人激光打印机Personal video recorder card 个人视频记录卡Photo printer照片打印机Pixel像素Platform scanner平版式扫描仪Plotter绘图仪Plug and play即插即用Plug-in boards 插件卡Pointer指示器Pointing stick 指示棍Port 端口Portable scanner便携式扫描仪Presentation files 演示文稿Presentation graphics 电子文稿程序Primary storage 主存Procedures 规程Processor处理机Programming control lanugage 程序控制语言Packets数据包Parallel data transmission 平行数据传输Peer-to-peer network system 得等网络系统person-person auction site个人对个人拍卖站点physical security 物理安全Pits凹面plug-in插件程序Polling 轮询privacy隐私权proactive主动地programmer 程序员Protocols 协议provider供应商proxy server代理服务pull products推取程序Kroducts 推送程序RAM cache随机高速缓冲器Range范围Record记录Relational database 关系数据库Replace 替换Resolution 分辨率Row行Read-only 只读Reformatting 重组regional service provider区域性服务供应商repetitive motion injury 反复性动作损伤reverse directory 反向目录right to financial privacy act of 1979 财产隐私法案Ring network环形网络Scanner扫描器Search查找Secondary storage device 助存储设备Semiconductor 半导体Serial ports 串行端口Server月艮务器Shared laser printer共享激光打印机Sheet表格Silicon chip 硅片Slots插槽Smart card 智能卡Soft copy软拷贝Software suite 软件协议Sorting排序分类Source file 源文件Special-purpose application 专用文件Spreadsheet电子数据表Standard toolbar标准工具栏Supercomputer 巨型机System cabine 系统箱System clock 时钟System software 系统软件Satellite/air connection services 卫星无线连接服务search engines 搜索引擎search providers搜索供应者search services搜索服务器Sectors 扇区security 安全Sending and receiving devices 发送接收设备Sequential access 顺序存取Serial data transmission 单向通信signature line 签名档snoopware监控软件software copyright act of1980 软件版权法案software piracy 软件盗版Solid-state storage 固态存储器specialized search engine 专用搜索弓［擎spiders网页爬虫spike尖峰电压Star network 星型网Strategy 方案subject 主题subscription address 预定地址Superdisk超级磁盘surfing网上冲浪surge protector浪涌保护器systems analyst系统分析师TTable二维表Telephony电话学Television boards 电视扩展卡Terminal 终端Template 模板Text entry文本输入Thermal printer 热印刷Thin client 瘦客Toggle key触发键Toolbar工具栏Touch screen 触摸屏Trackball追踪球TV tuner card电视调谐卡Two-state system双状态系统technical writer技术协作者technostress重压技术telnet远程登录Time-sharing system 分时系统Topology拓扑结构Tracks磁道traditional cookies传统的信息记录程序Twisted pair 双绞线Unicode统一字符标准uploading 上传usenet 世界性新闻组网络Virtual memory 虚拟内存Video display screen 视频显示屏Voice recognition system 声音识别系统vertical portal 纵向门户video privacy protection act of 1988 视频隐私权保护法案virus checker病毒检测程序virus病毒Voiceband音频带宽Volatile storage易失性存储votag^urge冲击性电压Wand reader条形码读入Web网络Web appliance环球网设备Web page 网页Web site address 网络地址Web terminal环球网终端Webcam摄像头What-if analysis 假定分析Wireless revolution 无线革命Word字长Word processing 文字处理Word wrap自动换行Worksheet file 工**文件web auctions网上拍卖web broadcasters 网络广播web portals门户网站web sites 网站web storefront creation packages 网上商店创建包web storefronts 网上商店web utilities网上应用程序web-downloading utilities网页下载应用程序webmaster web 站点管理员web万维网Wireless modems无线调制解调器wireless service provider 无线服务供应商world wide web 万维网worm蠕虫病毒他j^写保护口写Wt|其。
电工电子英语第三章
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第 9章
第9章 Transformers and electric motors 变压器和电动机
Overview 概述
9.1.1 Overview of transformer变压器概述 9.1.2 Lenz’s Law 楞次定律
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第 9章
When we introduced the subject of alternating current ,we said that the very great use made of AC supply system is due to the ease with which an AC supply can be stepped up or down in voltage . To do this we use a static transformer ,this device transforms low-voltage energy into highvoltage or vice versa 我们引入交流电概念时曾说过,交流供电 系统最方便之处在于它能调高和调低电压. 静态变压器把低压变成高压,反之亦然.
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第 9章
i1
u 1
+
e1
+
Ф
+
i2
+ u 2
e 2
N2
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N1
Magnetic motive force F = NI — 磁动势
说 the secondary windings must be equal and 明： opposite. 原边和副边的磁动势大小相等方向相反.
第 9章
Unit 2电子技术专业英语
电子技术专业英语
》》
UNIT TWO
Part Three
Inductors
电感
An inductor is an electrical device, which can temporarily store electromagnetic energy in the field about it as long as current is flowing through it. The inductor is a coil of wire that may have an air core or 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.
（原文片段） 原文片段）
电子技术专业英语
》》
UNIT TWO
Part One
Resistors
第一部分 电阻器
电阻
电阻器是一种电子元件，它能阻碍电流的流动。 电阻器是一种电子元件，它能阻碍电流的流动。在电阻器中流过的电 流与加在电阻两端的电压成正比，与电阻的阻值成反比。 流与加在电阻两端的电压成正比，与电阻的阻值成反比。这就是欧姆定 律，可以用公式表示成 I = U R / R 。电阻器一般是线性元件，它的 电阻器一般是线性元件， （伏安）特性曲线形成一条直线。 伏安）特性曲线形成一条直线。 电阻器常用做限流器， 电阻器常用做限流器，限制流过元件的电流以防止元件因流过的电 流过大而烧坏。电阻器也可用做分压器，以减少其他电路的电压， 流过大而烧坏。电阻器也可用做分压器，以减少其他电路的电压，如晶 体管偏置电路。电阻器还可以用做电路的负载。 体管偏置电路。电阻器还可以用做电路的负载。
电气工程及其自动化专业英语 Chapter 2 Electronics
Section 1 Introduction
Fig.2-2 Components of a signal system
Section 1 Introduction
Many electrical signals derived from physical systems are obtained from devices called transducers. We have already encountered an example of an alog transducer, the thermocouple pair. It converts temperature difference (the physical variable) to a voltage (the electrical variable). Generally, a transducer is a device that converts a physical or mechanical variable to an equivalent voltage or current signal. Unlike the thermocouple example, however, most transducers require some form of electrical excitation to operate.
Section 1 Introduction
we refer implicitly to voltages or currents. However, most of the concepts we discuss can be applied directly to systems with different informationcarrying variables. Thus, the behavior of a mechanical system (in which force and velocity are the variables) or a hydraulic system (in which pressure and flow rate are the variables) can often be modeled or represented by an equivalent electrical system. An understanding of the behavior of electrical systems, therefore, provides a basis for understanding a much broader range of phenomena.
(完整版)电子技术专业英语
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。
电工与电子技术英文版
电工与电子技术英文版Electricity and electronics are an essential part of modern life, enabling us to communicate, travel and access information in ways that were unimaginable just a few decades ago. As the use of electricity and electronics has grown, so too has the need for professionals with a broad knowledge of these fields. Electrical and electronic technicians play an important role in the research, design and manufacture of advanced electrical systems and components, as well as their maintenance and repair.Electrical and electronic technicians are experts in a wide variety of technologies, from simple circuits to complex microprocessors. They use sophisticated test equipment to measure current and voltage and diagnose faults, and also work with hand tools to assemble, install and maintain a variety of components and systems. They are also involved in the design of new systems, often using computer-aided design (CAD) software to create models or diagrams.To be successful in this field, one needs a strong technical background and excellent problem-solving skills. Knowledge of circuit theory and electronics is necessary, as is familiarity with basic mathematics, physics and chemistry. Technicians need to be well-versed in safety protocols and must possess the ability to follow instructions accurately. Attention to detail is also critical, as is a good understanding of relevant industry codes and standards.In addition to technical skills, electrical and electronic technicians must also possess good communicationand interpersonal skills. They must be able to work independently, as well as within a team, and be able to work in a fast-paced environment. The ability to troubleshoot faulty equipment and quickly identify solutions is also essential.The demand for electrical and electronic technicians is expected to remain strong in the years to come. This is due in part to the ever-increasing reliance on technology, as well as the need to repair and maintain existing equipment. With the right qualifications and experience, the job prospects are good and the rewards can be significant.。
英语作文电气类专业知识
英语作文电气类专业知识Electrical Engineering。
Electrical engineering is a field of study that deals with the design, development, and maintenance of electrical systems. These systems can include anything from power generation and distribution to communication networks and electronic devices. Electrical engineers are responsiblefor designing and implementing these systems, as well as ensuring that they operate safely and efficiently.One of the key areas of focus in electrical engineering is power generation and distribution. This involves designing and building power plants, transformers, and other equipment that is necessary to generate anddistribute electricity. Electrical engineers must also ensure that the electrical grid is reliable and can handle the demands of a growing population.Another important area of electrical engineering iscommunication networks. This includes designing and building telecommunications systems, such as cell phone networks and internet infrastructure. Electrical engineers must also ensure that these systems are secure and can handle the increasing demands of modern communication.Electronic devices are another area of focus in electrical engineering. This includes designing and building everything from computer hardware to medical equipment. Electrical engineers must ensure that these devices are efficient, reliable, and safe to use.In addition to these areas of focus, electrical engineering also involves research and development. This can include developing new technologies and improving existing ones. Electrical engineers must stay up to date with the latest advancements in their field and be able to apply this knowledge to their work.Overall, electrical engineering is a challenging and rewarding field of study. It requires a strong understanding of mathematics and physics, as well as acreative and innovative mind. Electrical engineers have the opportunity to make a significant impact on the world by designing and building the systems that power our lives.。
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电工及电子技术知识点英文集团文件发布号：（9816-UATWW-MWUB-WUNN-INNUL-DQQTY-<Electrical and electronic technology>Chapter One: DC Circuit and analysis methodsThe basic concept : the composition and role of thecircuit ; understand and master circuit current, voltage and electromotive force , the physical meaning of electric power and energy ; understand the meaning of the voltage and electromotive force , current reference direction ; understand and master the basic circuit element resistors, inductors, capacitors V - Ante , as well as a voltage source ( including the constant voltage source ) , the current source ( including the constant current source ) of the external characteristics ; understand circuit ( power ) of the three working status and characteristics ; understand the concept of electrical equipment ( components ) ratings , and three modes ofoperation ; understand the concept of the potential , understanding the relationship between the potential and voltage .Basic laws and theorems : mastering Kirchhoff's current and voltage law and Ohm's law and its applications , withparticular emphasis on Σ I = 0 and Σ U = significance 0:00 two sets of positive and negative numbers , and Ohm's law inthe sign significance. Analysis basis and method : Understanding resistance in series or parallel , hybridsolution method to master the equivalent resistance of the resistor circuit , as well as diversion, skilled application of pressure points formula ; master the method for determining the load circuit, circuit elements , power supply , control circuit power balance analysis ; master with branch current method , the principle of superposition , Thevenin theorem and power equivalent transformation methods such as analysis, calculation circuit ; grasp calculation circuit potential of each point . Chapter 2: sinusoidal AC circuitBasic concepts : understanding the three elements of a sinusoidal AC : amplitude, frequency and initial phase ; understand the concept of RMS and the phase difference ; grasp sine amount phasor notation , master volume and conversion methods sinusoidal phase between the amount ; understanding sinusoidal instantaneous power AC circuits , reactive power, apparent power concept , master active power, power factor concept ; understand the concept of impedance ; grasp complex calculation methods , master phasor diagram of the painting .Basic laws and theorems : Understand the basic laws of phasor form circuits , as well as phasor form ohm theorem.Analysis basis and method : mastering a single parameter AC circuit voltage and current phasor relationship, that the relationship between size and phase relationships ; understand impedance in series or parallel , hybrid solution method to master the equivalent impedance of the circuit , as well as diversion, the partial pressure of the formula phasor type of skilled application ; master circuit judge ( load ) nature ; master method phasor method , phasor diagram , as well as calculating the phase relationship between the size of the relationship and the simple sinusoidal circuit ; grasp active power, reactive power and apparent power calculation methods ,to improve understanding of the inductive load power factor approach.Chapter 3 : Three-phase AC circuitBasic concepts: symmetric three-phase voltage to understand the concept of understanding the concept of the phase voltage , phase current and line voltage and line current , to understand the concept of three-phase symmetrical and asymmetrical loads understand the concept of a three-phase symmetry of the circuit,the negative voltage and current , grasp the three-phase load connection method , understand three-phase four -wire power supply circuit in the middle of the action , understanding the three-phase circuit active power , apparent power and reactive power concept of .Analysis basis and method : mastering phase symmetrical load Y connection and △ connection , the line voltage and phase voltage and line current and phase current magnitude and phase relationships, and lines, calculate the phase voltages and currents ; master the three-phase unbalanced load when the Y connection and there is midline , calculate the line current and neutral current ; grasp three-phase circuit active power, apparent power and reactive power calculations.Chapter 4: Common semiconductor devicesBasic concepts : understanding the formation and unidirectional conductive semiconductor basic knowledge and PN junction ; grasp diode voltage characteristics and unidirectional conductivity characteristics, to understand the main parameters and significance diodes , master diode circuit symbol ; understanding silicon regulator the structure and main parameters of the regulator control circuit symbols ;understand the basic structure of the transistor and the current amplification, and the understanding of the characteristic curve of the transistor in the enlarged area , and the cutoff characteristics of the saturation region , the main parameters of the transistor understood master NPN type and PNP transistor circuit symbol .Analysis basis and method : the diode forward voltage withstand (positive bias ) diode conduction withstand reverse voltage ( reverse bias ) diode cutoff . When subjected to reverse breakdown voltage regulator tube current limiting resistor under the action of the voltage across the regulator stable and unchanging ( applying a reverse voltage is greater than the stable voltage , whether the person , the regulator reverse cutoff ) ; If the regulator withstand the forward voltage regulator turns on ( with the diode same ) .Ideal diode and the ideal regulator : for idealized treatment that forward voltage is zero , the reverse cutoff infinite resistance .Triode work in the enlarged area : emitter junction is forward biased voltage withstand ; collector junction withstand reverse bias voltage ;Transistors in saturation : the emitter junction is forwardbiased withstand voltage ; collector junction bear positive bias voltage ;Transistor in cutoff region : emitter junction withstand reverse bias voltage ; collector junction under reverse bias voltage ;Difficulties: including diodes and regulator circuit analysis , transistor three working state judgment and the judgment of the transistor type , polarity and materials. Chapter 5: Basic amplifier circuitBasic concepts : understanding the role of the composition of various common-emitter amplifier circuit part of the pole , understanding zoom works, understanding the static and dynamic amplification circuit , understand the role of quiescent operating point ; understanding amplifying circuit AC parameters: input resistance , output resistance and the magnification of the significance.Analysis basis and method : direct access and communication pathways master painting ; grasp static analysis methods: estimation method and graphical method ; grasp the DC load line painting ; grasp the dynamic analysis methods: micro- computing small signal ac equivalent circuit parameters becomes law ,graphic method for qualitative analysis will ; stable quiescent operating point to understand the processes and principles ; understanding emitter 's basic characteristics and uses.Key elements: a fixed bias circuit , voltage divider type amplifier circuit quiescent operating point of the three circuits emitter and slightly changed equivalent circuit. Will draw DC path and exchange accessChapter VI : Integrated Operational AmplifierBasic concepts : operational amplifier integrated graphics symbols and pins purposes ; negative feedback amplifier circuit and depth of negative feedback ; integrated operational amplifier ideal conditions and basic performance ; analysis of three basic op amp circuit ; integrated operational amplifier basic application Circuit ( ie : addition, subtraction , integral and differential circuits ) ; consisting operational amplifier , the main parameters ; proportional arithmeticcircuit , integrated operational amplifier applications ; model ideal conditions for integrated operational amplifier.Chapter 7: DC Power SupplyBasic concepts : Understanding DC power supply and the role offour areas : transformer , rectifier , filter and regulator ; understanding of single-phase half- wave bridge rectifier principle ; understand the principle of the filter circuit , voltage regulator circuit. Understand the integrated voltage regulator applications.Analysis basis and method : Mastering half-wave , bridge rectifier circuit calculating the average load voltage , current, and the calculation of the average current rectifier diode and the maximum reverse voltage. Will draw half-wave , wave bridge rectifier , and the rectifier output load current, voltage polarity.Chapter 8: combinational logic circuitBasic concepts : logical relations , and logic , or logic, non-logical , there is a corresponding basic gates , and doors, or doors and NAND gate . Combination gate circuit , a NANDgate , NOR gate , NOR gate , three-state gate , with the XOR gates and OR gates and the like. Should have a gate symbols, logic and logical expressions. Logical formula logic algebra is important to simplify the formula logical relationship should memorize and master simple formulaic approach .Analysis basis and method : combinational logic analysisand design is the focus of this chapter , in particular, is a combination of logical analysis , master steps.Difficulty: logical expression simplification and combinational logic circuit designChapter IX : sequential logic circuitsBasic concepts : basic RS flip-flop , synchronous RS flip-flop logic symbols and logic functions , JK flip-flop and Dflip-flop , is to learn the focus of this chapter. After the bistable , CP pulse leading edge trigger and the trigger edge , the difference between the symbols . Registers and counters should have analytical methods and points.Analytical basis and Methods: trigger -based , to find CP relationship between each trigger to determine the frontier or back porch , painting the output waveform , identify the key points of transition until the next pulse occurs .Difficulty: analysis of synchronous counter。