数据选择器竞争冒险及其处理的仿真分析
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摘要
文献一般都是针对SSI小规模组合电路竞争冒险进行分析,实际上MSI中规模组合电路也会出现竞争冒险现象。司佑全,张学文在译码器竞争冒险及其处理的仿真分析(湖北师范学院学报(自然科学版),2015年第4期)分析了译码器竞争冒险,现以74LS151和74LS153组成函数发生器为例,利用卡诺图和Multisim仿真软件来分析数据选择器的竞争冒险,得到数据选择器变量数等于地址端数时,不存在竞争冒险;变量数大于数据选择器地址端数,当不需要扩展外部电路时也不存在竞争冒险;当需要扩展外部电路实现所得函数,卡诺图中存在相切的卡诺圈时可能会出现竞争冒险。利用数据选择器和译码器进行一定的组合再结合相关门电路就能实现多变量逻辑函数。
In general,ones perform analysis on the competition adventure with SSI small- scale combinational circuit in the literature. However,in fact,the middling- scale combinational circuit also often occur in the competition adventure. In this paper,as example,taking the composition 74LS151 and 74LS153 as function generator,by use of the Karnaugh maps and Multisim simulation software,the authors perform analysis on the multiplexer of competition adventure and obtain the results that if the multiplexer variable equal to the number of address terminals,there is no competition adventure; while the number of variables is greater than the number of multiplexer addresses end and the external circuit dose not need to be extended,there exist some competition adventure. If some external circuit needs to be extended to come into being the function and there is a tangent Karnaugh map,the competition adventure may occur. By combinations of the multiplexer and decoder combined with certain door closing circuit,the multivariable logic function can be realized. The method of [1]to eliminate competition adventure decoder is also suitable for multiplexer.
In general,ones perform analysis on the competition adventure with SSI small- scale combinational circuit in the literature. However,in fact,the middling- scale combinational circuit also often occur in the competition adventure. In this paper,as example,taking the composition 74LS151 and 74LS153 as function generator,by use of the Karnaugh maps and Multisim simulation software,the authors perform analysis on the multiplexer of competition adventure and obtain the results that if the multiplexer variable equal to the number of address terminals,there is no competition adventure; while the number of variables is greater than the number of multiplexer addresses end and the external circuit dose not need to be extended,there exist some competition adventure. If some external circuit needs to be extended to come into being the function and there is a tangent Karnaugh map,the competition adventure may occur. By combinations of the multiplexer and decoder combined with certain door closing circuit,the multivariable logic function can be realized. The method of [1]to eliminate competition adventure decoder is also suitable for multiplexer.
引文
[1]司佑全,张学文.译码器竞争冒险及其处理的仿真分析[J].湖北师范学院学报(自然科学版),2015,(4):25~28.
[2]张顺兴,黄丽亚,杨恒新.数字电路与系统设计[M].南京:东南大学出版社:87,98~104.
[3]程秀英,侯卫周.基于NI Multisim 10.1数字逻辑选择器的虚拟仿真[M].实验科学与技术,2015,(3):10~13,26.
[4]马敬敏.用Multisim仿真分析数据选择器的工作过程[M].现代电子技术,2010,33(19):186~190.
[5]邢德胜.卡诺图在逻辑函数变换与MSI逻辑电路设计中的应用[J].集宁师专学报,2007,29(4):46~49.
[6]王芳.基于数字电路中卡诺图的应用研究[M].山西电子技术,2008.6:22~24.
[7]栗红霞,李姿景.卡诺图在中规模集成电路中的应用[M].科技信息,2010,02(23):108~109.
[8]包瑞刚,侯淑英.利用译码与数据选择器实现组合逻辑函数法[J].辽宁工程技术大学学报(自然科学版),2006,25(z1):209~210.
[9]单嵛琼,单长吉.双四选一数据选择器74 HC153的级联分析及研究[M].大学物理实验,2015(2):44~48.
[10]杨方.基于译码器和数据选择器进行组合逻辑电路设计[J].喀什师范学院学报,2012,33(3):51~52.
[11]吴瑞坤.数字逻辑电路与竞争冒险[J].宁德师专学报(自然科学版),1999,4:258~2260.
[12]司佑全,张学文.计数器竞争冒险及其处理的仿真分析[J].湖北师范学院学报(自然科学版),2015,1:25~28.
[13]张学文,司佑全.基于Muhisim8数字电路实验的几个使用技巧[J].湖北师范学院学报(自然科学版),2012,(4):75~78.
[14]胡伟.组合逻辑电路中竞争冒险的虚拟仿真实验设计[J].湖南第一师范学院学报,2010,10(5):152~156.
[15]邵平,周善东.竞争冒险检查和消除的仿真实例分析[J].海南大学学报(自然科学版),2005,23(2):172~174.
[16]赵霞.数据选择器实现组合逻辑函数的方法研究[J].电子制作,2014,(11):62~63.
[2]张顺兴,黄丽亚,杨恒新.数字电路与系统设计[M].南京:东南大学出版社:87,98~104.
[3]程秀英,侯卫周.基于NI Multisim 10.1数字逻辑选择器的虚拟仿真[M].实验科学与技术,2015,(3):10~13,26.
[4]马敬敏.用Multisim仿真分析数据选择器的工作过程[M].现代电子技术,2010,33(19):186~190.
[5]邢德胜.卡诺图在逻辑函数变换与MSI逻辑电路设计中的应用[J].集宁师专学报,2007,29(4):46~49.
[6]王芳.基于数字电路中卡诺图的应用研究[M].山西电子技术,2008.6:22~24.
[7]栗红霞,李姿景.卡诺图在中规模集成电路中的应用[M].科技信息,2010,02(23):108~109.
[8]包瑞刚,侯淑英.利用译码与数据选择器实现组合逻辑函数法[J].辽宁工程技术大学学报(自然科学版),2006,25(z1):209~210.
[9]单嵛琼,单长吉.双四选一数据选择器74 HC153的级联分析及研究[M].大学物理实验,2015(2):44~48.
[10]杨方.基于译码器和数据选择器进行组合逻辑电路设计[J].喀什师范学院学报,2012,33(3):51~52.
[11]吴瑞坤.数字逻辑电路与竞争冒险[J].宁德师专学报(自然科学版),1999,4:258~2260.
[12]司佑全,张学文.计数器竞争冒险及其处理的仿真分析[J].湖北师范学院学报(自然科学版),2015,1:25~28.
[13]张学文,司佑全.基于Muhisim8数字电路实验的几个使用技巧[J].湖北师范学院学报(自然科学版),2012,(4):75~78.
[14]胡伟.组合逻辑电路中竞争冒险的虚拟仿真实验设计[J].湖南第一师范学院学报,2010,10(5):152~156.
[15]邵平,周善东.竞争冒险检查和消除的仿真实例分析[J].海南大学学报(自然科学版),2005,23(2):172~174.
[16]赵霞.数据选择器实现组合逻辑函数的方法研究[J].电子制作,2014,(11):62~63.