8-3编码器是一种普通二进制编码器,对应的是八个变量的卡诺图,其最小项的排列及化简较复杂.用格雷码排列了卡诺图的最小项,通过几何位置确定了最小项的逻辑相邻项,然后用卡诺图化简法使这些逻辑相邻项得到了化简,并得出了8-3编码器的逻辑表达式. 8-3 Encoder is a kind of ordinary binary coder, corresponding to eight Karnaugh map variables, the minimum item arrangement and simplification is more complicated. Gray code is used to arrange the smallest item of Karnaugh map, through the geometric position The logical neighbor of the smallest term is determined, and then the logical adjacency terms are reduced by Karnaugh map simplification, and the logical expression of 8-3 encoder is obtained.