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一般化全加器在阵列乘法器设计中的典型应用 总被引：1，自引：0，他引：1
直接补码阵列乘法器是计算机提高定点乘法运算速度的重要部件,它的设计是一般化全加器的典型应用。从补码和真值的转换关系开始,深入分析了四类全加器的工作原理,提出了直接补码阵列乘法器的设计方案。 相似文献
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本文介绍了大数乘法器的一种高速实现算法,采用了Booth算法和Wallace Tree算法,通过减少部分积,并把大数加法拆分为32位的加法来实现对于大数乘法的高速运算.其核心的数据通路仅有一个16位的乘法器和一个32位的加法器组成,真正实现了以"小"资源实现了"大"运算. 相似文献
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阐述了一种24×24bit 48bit带饱和处理的乘加单元的优化设计.在乘法器的设计中,采用改进的Booth算法,并将被加数作为乘法器的一个部分积参与到Wallace树阵列中来完成乘加运算,大大提高了MAC的性能,同时还设计出优化的饱和检测逻辑电路.利用0.18μm1.8V1P6M标准CMOS工艺通过全定制方式实现了面积为679.2μm×132.5μm的带饱和处理的MAC单元,仿真结果表明:它与软件设计系统综合出的传统MAC单元相比,性能上有很大的改善,在节约23.52%的面积情况下速度也有一定的提高. 相似文献
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《绵阳师范学院学报》2019,(2)
根据移位相加原理,设计了常见的乘法器,并在此基础上做了两点改进.第一步通过调用条件加法器、条件移位寄存器,以此来减少部分积的加法运算;第二步通过对乘法器的前端处理,进一步减少条件加法器的调用次数,以此来提高运算速度.系统采用模块化设计,分别对三种乘法器进行了实验仿真,仿真结果对比可得:在100 MHz的时钟下,改进的乘法器比常见的乘法器加法器的调用次数少9,运算速度快0. 8 ns,因此在一定程度上验证了改进思想的正确性. 相似文献
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首先提出了一个新的电流型跨导运算放大器(OTA)非线性多端口宏模型,该模型用构造法建立,可模拟差模、共模输入阻抗、共模抑制比、可变跨导等典型参数以及偏置电流的影响,并用简洁的电路,模拟了OTA的输入饱和特性,避免了复杂的公式推导及运算.通过计算机SPICE程序的模拟和实验,证实了该模型的正确性.作为OTA的应用,还在典型OTA乘法器基础上,用本模型设计并实现了双差动式乘法器,克服了典型OTA乘法器的不足,经过理论和实验分析,取得了很好的结果. 相似文献
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《海外英语》2007,(5):10-11
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? 相似文献
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《海外英语》2007,(4):36
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. 相似文献
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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. 相似文献
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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. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献