【正文】 oltmeter and ammeter etc instrumentation. Also provides our daily mon various modeling accurate ponents, such as resistors, capacitors, and inductors, triode, diodes, relays, SCR, digital tube etc. Analog integrated circuits have all sorts of operational amplifiers, other mon integrated circuits. Digital circuit has 74 series integrated circuits, 4000 series integrated circuits, etc also support the homemade ponents. MultiSIM7 also has iv analyzer (equivalent to realworld transistor characteristics shown instrument) and Agilent signal generator, Agilent multimeter, Agilent oscilloscope and dynamic logic flat pen etc. At the same time it also can VHDL simulation and Verilog HDL simulation. (3) MATLAB one of the product family: they have many characteristics is facing the specific application of toolbox and simulation block, contains the plete function sets used to image signal processing, control system design, neural work, and other special application analysis and design. It has a data acquisition and report generation and MATLAB language programming generate independent C/C + + code, and other functions. MATLAB product family has the following features: data analysis, Numerical calculation and symbols, engineering and scientific drawing, Control system design, Digital image signal processing, Financial engineering。 7 EDA Technology And Software EDA is Electronic Design Automation (Electronic Automation) is the abbreviation of themselves, in the early 1990s from puter aided Design (CAD), puter aided manufacturing (CAM), puter aided testing (CAT) and puter aided engineering (CAE) development of the concepts and e. EDA technology is on the puter as the tool, the designer in EDA software platform, with VHDL HDL finish design documents, then by the puter automatically logic pilation, reduction, division, prehensive, optimization, layout and wiring and simulation for a particular goal chips, until the adapter pilation, logic mapping and programming download, etc. 1 EDA technology concepts EDA technology is in electronic CAD technology developed on the basis of puter software system by means of puter for working platform, shirtsleeve application of electronic technology, puter technology and information processing and intelligent technology to the latest achievements of electronic products, the automatic design. Using EDA tools, electronic stylist can be from concept, algorithm, agreement, etc, begin to design your electronic system a lot work can be finished by puter and electronic products can be from circuit design, performance analysis to design the IC territory or PCB layout the whole process of the puter automatically plete the processing. Now on the concept of using EDA or category very wide. Included in machinery, electronics, munication, aerospace, chemical, mineral, biology, medicine, military and other fields, have EDA applications. Current EDA technology has in big panies, enterprises, institutions and teaching research departments extensive use. For example in the aircraft manufacturing process, from design, performance testing and characteristic analysis until a flight simulator, all may involve EDA technology. Globalizationthe EDA technology, mainly in electronic circuit design, PCB design and IC design. EDA can be divided into system level and circuitlevel and physical implementation level. 2 EDA monly used software EDA tools to emerge in endlessly, now entering into China and extensive influence of EDA software are: multiSIM7 (original EWB the latest version), PSPICE OrCAD, PCAD, Viewlogic Protel was little, Synopsys, LSIIogic, MicroSim Cadence, etc. These tools are strong function, generally can be used in several aspects, such as many software can undertake circuit design and simulation, with into and can be automatically PCB layout wiring, output various s list document with a third party software interface. According to the main function below or main applications, divided into circuit design and simulation tools, PCB design software, IC design software and PLD design tools and other EDA software, simple introduction. electronic circuit design and simulation tools We may have used test plate or other things has produced some electronic making to carry on the practice. But sometimes, we will find it to have a lot of questions, didn39。 EDA技術(shù)發(fā)展迅猛，完全可以用日新月異來描述。日本、韓國都有 ASIC設(shè)計(jì)工具，但不對(duì)外開放。 外設(shè)技術(shù)與 EDA工程相結(jié)合的市場前景看好，如組合超大屏幕的相關(guān)連接，多屏幕技術(shù)也有所發(fā)展。有條件的企業(yè)可開展“網(wǎng)絡(luò)制造”，便于合作設(shè)計(jì)、合作制造，參與國內(nèi)和國際競爭。 中國 EDA市場已漸趨成熟，不過大部分設(shè)計(jì)工程師面向的是 PCB制板和小型 ASIC領(lǐng)域，僅有小部分 （約 11%）的設(shè)計(jì)人員開發(fā)復(fù)雜的片上系統(tǒng)器件。 從應(yīng)用領(lǐng)域來看， EDA技術(shù)已經(jīng)滲透到各行各業(yè)，如上 文所說，包括在機(jī)械、電子、通信、航空航航天、化工、礦產(chǎn)、生物、醫(yī)學(xué)、軍事等各個(gè)領(lǐng)域，都有 EDA應(yīng)用。一般學(xué)習(xí)電路仿真工具（如 multiSIM、 PSPICE）和 PLD開發(fā)工具（如Altera/Xilinx的器 件結(jié)構(gòu)及開發(fā)系統(tǒng)），為今后工作打下基礎(chǔ)。 （ 3）其它 EDA軟件如專門用 于微波電路設(shè)計(jì)和電力載波工具、 PCB制作和工藝流程控制等領(lǐng)域的工具，在此就不作介紹了。 PLD技術(shù)在發(fā)達(dá)國家已成為電子工程師必備的技術(shù)。 （ 9） WSI：生產(chǎn) PSD（單片機(jī)可編程外圍芯片）產(chǎn) 品。 （ 6） Lucent：主要特點(diǎn)是有不少用于通訊領(lǐng)域的專用 IP 核，但 PLD/FPGA 不是 Lucent的主要業(yè)務(wù)，在中國地區(qū)使用的人很少。 5 （ 4） ACTEL：反熔絲（一次性燒寫） PLD的領(lǐng)導(dǎo)者。 ISP技術(shù)極大地促進(jìn)了 PLD產(chǎn)品的發(fā)展，與 ALTERA和 XILINX相比，其開發(fā)工具比 Altera和 Xilinx略遜一籌。通常來說，在歐洲用 Xilinx 的人多，在日本和亞太地區(qū)用 ALTERA的人多，在美國則是平分秋色。 Altera公司提供較多形式的設(shè)計(jì)輸入手段，綁定第三方 VHDL綜合工具，如 ：綜合軟件 FPGA Express、 Leonard Spectrum，仿真軟件 ModelSim。下面介紹主要器件生產(chǎn)廠家和開發(fā)工具。目前主要有兩大類型： CPLD（ Complex PLD）和 FPGA(Field Programmable Gate Array)。只不過是選擇不同公司的 SPICE，像 MiceoSim的 PSPICE、 Meta Soft的 HSPICE等等。其它各 EDA軟件開發(fā)公司也提供各自的布局布線工具。隨著 FPGA設(shè)計(jì)的規(guī)模越來越大，各 EDA公司又開發(fā)了用于 FPGA設(shè)計(jì)的綜合軟件，比較有名的有： 4 Synopsys的 FPGA Express， Cadence 的 Synplity， Mentor的 Leonardo，這三家的 FPGA綜合軟件占了市場的絕大部分。 （ 3）綜合工具 綜合工具可以把 HDL變成門級(jí)網(wǎng)表。 Viewlogic的仿真器有： viewsim門級(jí)電路仿真器， speedwaveVHDL仿真器， VCSverilog仿真器。像 Cadence的 poser， viewlogic 的 viewdraw，硬件描述語言 VHDL、 Verilog HDL 是主要設(shè)計(jì)語言，許多設(shè)計(jì)輸入工具都支持 HDL（比如說 multiSIM等）。其它公司的軟件相對(duì)來說使用者較少。使用多層印制線路板的自動(dòng)布線，可實(shí)現(xiàn)高密度 PCB的 100%布通率。 目前在我國用得最多當(dāng)屬 Protel，下面僅對(duì)此軟件作一介紹。 MATLAB產(chǎn)品族具有下列功能：數(shù)據(jù)分析；數(shù)值和符 號(hào)計(jì)算、工程與科學(xué)繪圖；