我应该在逻辑电路设计中消除输入吗? [英] Should I eliminate inputs in a logic circuit design?

问题描述

最近我在考试中对我们进行了逻辑电路测试.我在那次考试中遇到了以前从未遇到过的事情.请原谅我，因为我不记得给出的确切问题，因此我们还没有得到评分.但是，我将描述问题.

Recently I had an exam where we were tested on logic circuits. I encountered something on that exam that I had never encountered before. Forgive me for I do not remember the exact problem given and we have not received our grade for it; however I will describe the problem.

问题输入了3或4.我们被告知要简化，然后为简化而画逻辑电路设计.但是，当我简化时，我最终消除了其他输入，最终只得到了

The problem had a 3 or 4 inputs. We were told to simplify then draw a logic circuit design for that simplification. However, when I simplified, I ended up eliminating the other inputs and ended up literally with just

A

我还有另一个类似的问题，当时有4个输入，当我简化时，我得到了3个.我的问题是:

I had another problem like this as well where there was 4 inputs and when I simplified, I ended up with three. My question is:

如何处理消除的输入?我只是没有电路吗?我怎么画呢?

What do I do with the eliminated inputs? Do I just not have it on the circuit? How would I draw it?

推荐答案

通常，输出是一项不能消除的要求，即使最终依赖于单个输入也是如此.如果输入A流经输出Y，则只需在图中将A连接到Y.如果输出Y始终为0或1，则将输入的0或1连接到输出Y.

Typically an output is a requirement which would not be eliminated, even if it ends up being dependent on a single input. If input A flows through to output Y, just connect A to Y in the diagram. If output Y is always 0 or 1, connect an incoming 0 or 1 to output Y.

另一方面，在问题的定义中，有可能(而不是必须)输入因素.与输出无关的输入根本不需要在电路图中显示.

On the other hand, inputs are possible, not required, factors in the definition of the problem. Inputs that have no bearing on the output need not be shown in the circuit diagram at all.

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