摘要
为直接利用现有逻辑器件实现多输出对称函数,通过对2 线-4 线译码器的逻辑功能和二变量基本对称函数的定义的比较,提出2 线-4 线译码器可用作二变量基本对称函数产生器. 由于任意n 变量的基本对称函数均可通过二变量基本对称函数产生器的树型扩展得到实现,因此,任意n 变量的对称函数可以用2 线-4 线译码器予以实现. 文中分别就变量数为奇数和偶数的情况进行了讨论.
In order to realize multiple output symmetric functions by using existing logic devices directly, this paper proposes a two to four decoder can be used as a generator of two variable fundamental symmetric functions by comparing the logic function of two to four decoder and the definition of two variable fundamental symmetric function. Since an arbitrary n variable fundamental symmetric function can be realized in terms of a tree construction expansion of the above generators,an arbitrary n variable symmetric function can be realized by using two to four decoders,and the logic synthesis of symmetric functions with odd number and even number variables is discussed, respectively. The logical synthesis of symmetric functions may obtain the simpler circuit realization for multiple output symmetric functions.
出处
《科技通报》
2000年第1期21-26,共6页
Bulletin of Science and Technology
关键词
对称函数
对称函数产生器
逻辑设计
电路结构
symmetric function
generator of symmetric function
logic design
circuit realization
