电子信息专业外文翻译

精品文档 37 欢迎下载 英文翻译 届 电子信息工程电子信息工程 专业 班级 姓 名 学 号 指导教师 二 一 六 年 三 月 十 日 精品文档 38 欢迎下载 EDA的发展及VHDL的应用 90 s in 20 centuries international last electronics and calculator technique more the forerunner s nation has been being actively investigating a new design method of the electronics electric circuit and carried on an exhaustive change in the aspects of designing a method tool wait obtain huge success At the design realm of the electronics technique the application of programmable logic spare part like CPLD FPGA have already got extensive universality these spare parts brought tremendous vivid for the design of numerical system These spare parts can pass a software plait a distance but as to it s hardware structure and work the way carry on heavy Gou and make thus the design of hardware can like software design so convenient fast The all these biggest changed a traditional numerical method design process of the system design and design idea and promoted the EDA technical quick development The EDA is an electronics design automation the Automation of the Electronic Design of abbreviation design CAD from the calculator assistance at the beginning of 90 s in 20 centuries calculator assistance manufacturing CAM calculator assistance test CAT and calculator lend support to the concept of engineering CAE a development since then The EDA technique is to take calculator as tool design at EDA software terrace up use the hardware description language HDL completion a design a document then is of oneself completed logic to edit and translate turn Chien partitioned by the calculator comprehensive excellent turn set up cloth line with imitate really until for particular target chip of proper go together with to edit and translate the logic reflect to shoot with plait distance download etc work The EDA technical emergence biggest raised efficiency and maneuverability of electric circuit design eased to design of labor strength These spare parts can pass a software plait a distance but as to it s hardware structure and work the way carry on heavy Gou and make thus the design of hardware can like software design so convenient fast The all these biggest changed a traditional numerical method design process of the system design and design idea and promoted the EDA technical quick development Make use of EDA tool the electronics designer can start design electronics system from the concept calculate way agreement etc a great deal of work can pass calculator completion and can design the electronics product is from the electric circuit the function analyze compute of the whole process of design an IC landscape or PCB landscape on board auto processing completion Use to the EDA concept or category very breadth now Include in each realm of the machine electronics correspondence aviation aerospace chemical engineering mineral living creature medical science military etc all there is EDA application The EDA technique has already extensively used in each archduke department the Qi business unit and research teaching section currently For example in the airplane the manufacturing the process from design performance test and characteristic analytical until fly emulation may involve an EDA technique The EDA technique that this text point mainly to the design PCB design of the electronics electric circuit and IC design The EDA design can is divided into system class electric circuit class and physics to carry out class The EDA in common use software The 精品文档 39 欢迎下载 EDA tool pile up one after another and get into an our country currently and have the EDA software of extensive influence to have MultiSIM 7 the latest edition of original EWB PSPICE OrCAD PCAD Protel Viewlogic Mentor Graphics Synopsys LSIIogic Cadence MicroSim ISE modelsim etc These tools all have stronger function generally can used for a few aspects for example a lot of softwares all can carry on an electric circuit design with imitate really together entering can also carry on PCB to automatically set up cloth line can output various net form a document with the third square software connect The VHDL English full name be the HardwareDescription Language of the Integrated Circuit of the Very High Speed birth in 1982 At the end of 1987 the VHDL is confirm by IEEE and American Ministry of National Defense to describe language for the standard hardware Announced VHDL standard edition from the IEEE IEEE 1076 call 87 versions after the each EDA company released own VHDL design environment one after another or declared that the own design tool can connect with VHDL Henceforth the VHDL designed realm to get to extensively accept in the electronics and gradually replaced an originally not standard hardware description language In 1993 the IEEE carried on to revise to the VHDL describe ability to up expand a VHDL contents from higher abstract layer and the system announced the VHDL of new edition namely IEEE standard of 1076 1993 editions call 93 versions Now VHDL and Verilog are the industrial standard hardware description of the IEEEs language again arrive support of numerous EDA companies at electronics engineering realm have become in general use hardware to describe language in fact There is expert think in the new century in the VHDL will start to undertake a greatly part of numerical system design mission at the Verilog language The VHDL language is a kind of deluxe language which useds for an electric circuit design It expects to appear after the 80 s of BE at the beginning come out by American Ministry of National Defense development to provide the American solider with the credibility which uses to raise a design with cut 1 kind of development period to use the scope smaller design language All of VHDL Englishes write BE The Descriptiong Language of the VHSIC the Speed Integrated of the Very High Circuit Hardware Translating into Chinese is soon extremely high the description language of the integrated circuit hardware So it of the application mainly is an application in the design of numerical electric circuit Currently it is in the application most in China is the design which uses in the FPGA CPLD EPLD Certainly in some units with stronger real strenght it is also use to design ASIC The VHDL mainly useds for the structure behavior which describes numerical system function with connect In addition to implying many languages sentence which have a hardware characteristic VHDL languages forms and description style and sentence construction are very similar at general calculator deluxe language VHDL procedure structure characteristics is an engineering design or call that the design entity can be a component an electric circuit mold piece or a system is divided into exterior or call but part and port with inner part or call to can t see part since involve internal function and calculate way of entity to complete part of At to 1 designed entity to define exterior interface after once it internal development completion after other designs can directly adjust to use this entity This kind of will design entity to be divided into a little bit basic VHDL system 精品文档 40 欢迎下载 that is a VHDL system inside the concept of outside part design design of a little bit basic and other hardware describe the language compare and the VHDL has a following characteristics The function is strong and the design be vivid The VHDL has the function strong language structure can describe a complicated logic control with the simple and direct and explicit source code It has a multi layer design description function in multiple layers thin turn finally directly born electric circuit class description The VHDL supports synchronous electric circuit difference s tread electric circuit with random the design of electric circuit this be the other hardware description although the language can t compare to The VHDL still supports various design method since support from the bottom upward design support again from the design of crest declivity Since the support mold piece turns a design support layer s turn a design again Support extensively and be easy to a modification Because the VHDL has already become IEEE standard the norm of hardware description language most EDA tools almost support VHDL currently this is VHDL of further expansion with extensively applied lay foundation In the design process of the hardware electric circuit the main design document is the source code which writes with the VHDL the VHDL easily reads with the structure turn so be easy to a modification design The strong system hardware describes ability The VHDL has a multi layer design description function since can describe system class electric circuit can describe door class electric circuit again And description since can adopt a behavior description deposit a machine to deliver description or structure description can also adopt the hybrid description of threes mixture Moreover VHDL support is inertial to delay and deliver to delay can also accurately build up hardware electric circuit model VHDL support prepare definite of with from definition of data type bring hardware description a bigger freedom degree make design the personnel can expediently establish the system model of high time The independence is at the design of spare part have nothing to do with the craft Don t need to consider a choice completion the spare part of design first while designing a personnel to carry on a design with the VHDL can concentrate energy to carry on design of excellent turn When the design description complete after can carry out its function with various different spare part structure Very strong transplantation ability The VHDL is a kind of hardware description for standardize language the same of design description can be support by the different tool and make to design to describe of the transplantation make possible Be easy to a share and reply to use The VHDL adoption can build up various mold piece that can again make use of according to the design method of database Library These canned in advance design or use to design a medium backup mold a piece before and depositted these to the database in can be in laterly of the design carry on replying to use can make the design result be design the personnel s to carry on exchanges and share decrease hardware electric circuit design 1 compared with other hardware description languages the VHDL have stronger behavior description ability come to a decision him to become a system design realm the best hardware a description language thus The strong behavior description ability is to avert from concrete spare part structure and describe and design important assurance of large scale electronics system from the logic behavior 精品文档 41 欢迎下载 2 the VHDL be abundant of imitate true language sentence and database function make in any big system of the design can inspect a function possibility of design the system in early days can carry on imitating true emulation to the design at any time 3 the ability and procedure structure of the behavior description with lexical VHDL come to a decision the decomposition that he has to support a large scale design with have already have design of again make use of function Meet the market demanding large scale system efficiently the completion of the high speed has to include many people the several generation hair set even together and abreast works and then can carry out 4 for use the design of an assurance of VHDL completion can make use of EDA tool to carry on logic comprehensive with excellent turn and auto of the VHDL describe the design change into the door class net form 5 the description of VHDL to design have opposite and independent the design can not understand the structure of hardware and need not manage the target spare part that the end design carry out either is what but carry on an independent design Founded in 1981 this year has entered the Mentor of 25 years is the oldest in the three major electronic design automation EDA vendors and turnover ahead of a competitor four times in addition to Mentor system design tools market share ranking first in the world especially in the PCB layout Mentor strengths which also ranked first in the world its turnover is a full 1 5 times the second supplier To assist customers in China audiovisual application specific markets Technical Support Mentor the largest part of human input in the past each year is almost more than three times the rate of growth in order to strengthen the ability of the Physical the Design and Functional Architecture and for the continued development of database management tool is also spared no effort in shipment volume growth of around 20 in the past five years 15 of the revenue progress is the fastest growing EDA manufacturers 20世纪90年代 国际上电子和计算机技术较先进的国家 一直在积极探索新的电子电路设计方法 并在设计方法 工具等方面进行了彻底的变革 取得了巨大成功 在电子技术设计领域 可编程逻辑 器件 如 CPLD FPGA 的应用 已得到广泛的普及 这些器件为数字系统的设计带来了极大的灵活 性 这些器件可以通过软件编程而对其硬件结构和工作方式进行重构 从而使得硬件的设计可以如同 软件设计那样方便快捷 这一切极大地改变了传统的数字系统设计方法 设计过程和设计观念 促进 了 EDA 技术的迅速发展 EDA 是电子设计自动化 Electronic Design Automation 的缩写 在 20世纪90年代初从计算 机辅助设计 CAD 计算机辅助制造 CAM 计算机辅助测试 CAT 和计算机辅助工程 CAE 的概念发展而来的 EDA 技术就是以计算机为工具 设计者在EDA 软件平台上 用硬件描述语言 HDL 完成设计文件 然后由计算机自动地完成逻辑编译 化简 分割 综合 优化 布局 布线和仿 真 直至对于特定目标芯片的适配编译 逻辑映射和编程下载等工作 EDA 技术的出现 极大地提 高了电路设计的效率和可操作性 减轻了设计者的劳动强度 这些器件可以通过软件编程而对其硬件结构和工作方式进行重构 从而使得硬件的设计可以如同 软件设计那样方便快捷 这一切极大地改变了传统的数字系统设计方法 设计过程和设计观念 促进 了 EDA 技术的迅速发展 利用 EDA 工具 电子设计师可以从概念 算法 协议等开始设计电子系统 大量工作可以通过计算机 完成 并可以将电子产品从电路设计 性能分析到设计出IC 版图或 PCB 版图的整个过程的计算机 精品文档 42 欢迎下载 上自动处理完成 现在对 EDA 的概念或范畴用得很宽 包括在机械 电子 通信 航空航天 化工 矿产 生物 医学 军事等各个领域 都有EDA 的应用 目前 EDA 技术已在各大公司 企事业单位和科研教学部 门广泛使用 例如在飞机制造过程中 从设计 性能测试及特性分析直到飞行模拟 都可能涉及到 EDA 技术 本文所指的 EDA 技术 主要针对电子电路设计 PCB 设计和 IC 设计 EDA 设计可分为系统级 电路级和物理实现级 EDA 常用软件 EDA 工具层出不穷 目前进入我国并具有广泛影响的EDA 软件有 multiSIM7 原 EWB 的最新版本 PSPICE OrCAD PCAD Protel Viewlogic Mentor Graphics Synopsys LSIIogic Cadence MicroSim ISE modelsim 等等 这些工具都有较强的功能 一般可用于几个方面 例如很多软件 都可以进行电路设计与仿真 同进还可以进行PCB 自动布局布线 可输出多种网表文件与第三方软 件接口 2 VHDL 的英文全名是 Very High Speed Integrated Circuit HardwareDescription Language 诞生于1982年 1987年底 VHDL 被 IEEE 和美国国防部确认为标准硬件描述语言 自 IEEE 公布了 VHDL 的标准版本 IEEE 1076 简称87版 之后 各 EDA 公司相继推出了自己的 VHDL 设计环境 或宣布自己的设计工具可以和VHDL 接口 此后 VHDL 在电子设计领域得到了广泛的接受 并逐步取代了原有的非标准的硬件描述语言 1993年 IEEE 对 VHDL 进行了修订 从更高的抽象层 次和系统描述能力上扩展 VHDL 的内容 公布了新版本的 VHDL 即 IEEE 标准的1076 1993版本 简称93版 现在 VHDL 和 Verilog 作为 IEEE 的工业标准硬件描述语言 又得到众多EDA 公司 的支持 在电子工程领域 已成为事实上的通用硬件描述语言 有专家认为 在新的世纪中 VHDL 于 Verilog 语言将承担起大部分的数字系统设计任务 VHDL 语言是一种用于电路设计的高级语言 它在 80年代的后期出现 最初是由美国国防部开发 出来供美军用来提高设计的可靠性和缩减开发周期的一种使用范围较小的设计语言 VHDL 的英文全写是 VHSIC Very High Speed Integrated Circuit Hardware Descriptiong Language 翻译成中文就是超高速集成电路硬件描述语言 因此它的应用主要是应用 在数字电路的设计中 目前 它在中国的应用多数是用在FPGA CPLD EPLD 的设计中 当然在一些 实力较为雄厚的单位 它也被用来设计ASIC VHDL 主要用于描述数字系统的结构 行为 功能和接口 除了含有许多具有硬件特征的语句外 VHDL 的语言形式和描述风格与句法是十分类似于一般的计算机高级语言 VHDL 的程序结构特点是 将一项工程设计 或称设计实体 可以是一个元件 一个电路模块或一个系统 分成外部 或称可是 部分 及端口 和内部 或称不可视部分 既涉及实体的内部功能和算法完成部分 在对一个设计实 体定义了外部界面后 一旦其内部开发完成后 其他的设计就可以直接调用这个实体 这种将设计实 体分成内外部分的概念是 VHDL 系统设计的基本点 VHD