逻辑函数无关项概念辨析  

Analysis of the Concept of Don′t-Care Term of Logic Function

作　　者：喻俊淇 张华卫[2] 王全宇[2] 党建武[1,2] 蒋占军[2] YU Junqi;ZHANG Huawei;WANG Quanyu;DANG Jianwu;JIANG Zhanjun(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070 [2]兰州交通大学电子与信息工程学院,兰州730070

出　　处：《电气电子教学学报》2022年第4期100-103,共4页Journal of Electrical and Electronic Education

基　　金：兰州交通大学教改基金项目(JGY201603、SZZX202020)。

摘　　要：无关项是“数字电子技术”非完全定义逻辑函数理论教学中的重要内容,无关项包涵约束项和任意项,合理应用无关项对数字逻辑电路实践有重要意义。当前,教学上对这三个概念存在争议和困惑,国内外通行教材讲解并不一致。对约束项、任意项和无关项概念追本溯源进行了定义论证,并举具体实例就概念的理解和区分进行说明。对数字逻辑电路无关项内容的教学有一定的指导作用。Don′t-care term is an important content in the teaching of incomplete definition logic function theory in digital electronic technology. Don′t-care term includes constraint term and arbitrary term. Reasonable application of don′t-care term is of great significance for the practice of digital logic circuit. At present, there are controversies and confusions on the three concepts in teaching, and the explanations of the popular textbooks at home and abroad are not consistent. This paper demonstrates the origin of the concepts of constraint term, arbitrary term and don′t-care term, and illustrates the understanding and differentiation of the concepts with specific examples. This paper has a certain guiding role in the teaching of don′t-care terms in digital logic circuits.

关 键 词：无关项 约束项 任意项 

分 类 号：G642.0[文化科学—高等教育学]