逻辑函数表达式几种常用形式的转换方法

Transformation for some usual forms of logic function expressions

在用限定的逻辑门电路实现某一逻辑功能时需要进行逻辑函数表达形式的变换。基于探索各种逻辑函数表达式获取方法的目的,采用以与或表达式为基础及各种表达式的定义出发进行变换的方法,给出了逻辑函数表达式几种常用形式的转换方法与步骤,并给出基于特殊最小项构成的标准与或式变换成逻辑函数异或式的方法与步骤。变换过程简单、方便快捷,能提高数字逻辑电路的设计效率。

In logic circuit design,transformation for logic function expression is essential for realizing special logic function with limited logic gates.An exploration is made to gain all kinds of logic function starting from AND-OR expression.The method and process to some usual logic function expressions are derived as well as to changing stander AND-OR expression based on special minterms into XOR expression.It＇s concluded that the method is simple and convenient,and design efficiency could be promoted.