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在日常生活中,人们常遇到从两处用开关控制一盎灯的问题,一般从思维推理判断就能设计这样的开关电路。但是,当需要从多处用开关控制灯电路,用这种凑合方法来设计是很困难的。本文提出一种逻辑电路设计法,简明方便,且不受控制地点过多的限制。一、基本原理多地控制灯电路实质上是一个异或逻辑电路,所以先简要介绍异或逻辑函数及其主要特性,和包含异或(同或)因子的逻辑函数最小化方法。 (一)异或(同或)逻辑函数设变量A和B逻辑值不相同时,逻辑函数输出值为1,否则为0,则该逻辑函数称为异或逻辑。其逻辑
In daily life, people often encounter the problem of switching an ounce of light from two switches. Generally speaking, it is possible to design such a switching circuit from the perspective of thinking and reasoning. However, when it is necessary to control the lamp circuit from a plurality of switches, it is difficult to design by this improper method. This paper presents a logic circuit design method, concise and convenient, and uncontrolled places too many restrictions. First, the basic principle Controlled lamp circuit is essentially an XOR logic circuit, so briefly introduce the XOR logic function and its main features, and contains XOR (with or) factor of the logic function to minimize the method. (A) Exclusive OR (same or) logic function When the logical values of variables A and B are different, the output value of the logic function is 1, otherwise it is 0, the logic function is called XOR logic. Its logic