GATES FROM GATES

In our look at the various types of logic gates, we restricted ourselves to gates with two inputs. However, you’ll remember that the sample gates in the gates have an attribute that defines the number of gates, from two to 32. The fact is that logic gates can have any number of inputs, and this can be achieved at the level of transistors – or, if you only have 2-input gates, you can work at the level of logic elements, connecting those gates together to produce gates with more inputs in various ways. For example, two 2-input OR gates can be used to create a single 3-input OR gate.