EDA技术及应用实例

介绍 EDA技术及其工具软件、可编程逻辑器件、硬件描述语言的发展和特点 ,并给出 EDA设计与综合的一般方法。     

浅谈EDA技术及应用的教学

本文简要地介绍了EDA技术的特点,用EDA技术作为开发手段,实现一个数字系统的设计。系统采用了顶层图形设计思想,基于硬件描述语言,以可编程器件为核心,具有体积小、可靠性高、灵活性强等特点,并简要地比较了EDA技术与传统电子设计方法的差异,总结出EDA技术的优势。     

基于CPLD和DDFS技术的多波形信号发生器设计

本设计利用EDA开发平台,采用可编程逻辑器件CPLD,利用FDDS技术,以VHDL语言为设计基础,使信号发生器的硬件功能可通过编程来实现0～5V的正弦波、三角波、方波和锯齿波信号.从而大大地节省了硬件开销和软件的编程难度,进而实现了一种性能较高的信号发生器.与模拟信号发生器相比,该系统具有波形稳定、精确度高、抗干扰性能力强、轻便、现场可编程、使用方便等特点.     

基于CPLD的脉搏快速测量

本文介绍了一种新型脉搏快速测量系统。该系统的数据采集部分采用光电传感器，使测量无接触，从而提高精确性；数据处理部分采用了Altera公司的复杂可编程逻辑器件(CPLD)，集成度高，数据处理功能强大。设计方法采用VHDL硬件描述语言，在EDA软件平台MAX PLUS Ⅱ中进行。文中给出了系统的工作原理、电路组成及时序仿真结果。     

可编程逻辑器件课程的探索与实践

随着电子技术的飞速发展，电子工程师越来越不满足于使用通用的逻辑器件来设计电路。可编程逻辑器件以其优良的性能在全世界被广泛的使用，并与EDA技术相结合，其应用前景十分乐观。而在电子类专业开设可编程逻辑器件课也是顺应了科技的发展。本文对可编程逻辑器件课的教学进行了探讨，并阐述了自己的实践。     

EDA技术在数字逻辑实验教学中的应用

传统的数字实验教学方式已经滞后于社会技术的发展,因此新型可编程器件+EDA软件+硬件描述语言的现代数字设计方法被提出,将它应用于数字逻辑实验教学中。介绍EDA技术及其在数字逻辑实验教学中的意义,并通过实例介绍如将EDA技术用于数字逻辑实验教学中。     

系统可编程模拟器件ispPAC20在状态变量滤波器设计中的应用

随着微电子技术和EDA技术的发展，继可编程逻辑器件大量使用之后，系统可编程模拟器件也相继推出。本文以二阶状态变量滤波器的设计为例，介绍了系统可编程模拟器件ispPAC20及其在状态变量滤波器设计中的应用。     

用VHDL实现电子密码锁

随着超大规模电路及计算机技术的快速发展,EDA技术被广泛应用到通讯、国防、空间技术、医药科学、工业自动化和智能装置等领域。着重讨论了采用EDA技术设计的一种基于VHDL语言的电子密码锁。实验结果表明,与单片机系统设计的密码锁相比,基于VHDL语言的电子密码锁具有更高的实时性、高运算速度以及高集成度。     

系统可编程逻辑器件在电路设计中的应用

近年来,电子计算机和可编程逻辑器件的发展给电子电路设计带来了革命性的变化.电子电路的设计过程原来是由书面设计到硬件搭接试验再到制作样机的过程,现在正过渡到使用EDA(电子设计自动化)软件设计工具进行设计.在系统可编程逻辑器件(ISP-PLD)的出现,使得用于数字系统的大量中小规模74LS系列和CD系列器件,甚至常规PLD器件都可以用ISP-PLD所取代,从而实现了硬件设计和修改软件化,降低了成本,缩短了设计周期.……     

基于EDA技术的电子密码锁电路设计

安全可靠、使用方便的新型防盗锁是现代社会中人们在安全防盗中的首选,以Max PlusⅡ作为软件平台,用VHDL硬件语言描述,并结合PLD可编程逻辑器件的综合EDA技术使得高可靠性、高保密性的电子锁的设计变得简单易行。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.