4 Way DMux

In this exercise, we will build a 4 way DMux.

We have already implemented a simple (2 way) DMux. In that there is one input line, and one selector. The value of the selector, determines, which output line the input is routed to.

In a 4 way DMux, we have 1 input line, 4 possible output lines, and 2 selectors. Based on the value of the selector, the input line is router to one of the 4 output lines.

We can implement a 4 way DMux, using multiple regular (2 way) DMux's. If we look at the truth table, we will notice that if selector[0] is 0, then in can be routed to either 'a', or 'c' (based on the value of selector[1]). If selector[0] is 1, then the input can be sent to either 'b', or 'd' (based on the value of selector[1]).


The code for the 4 way DMux us specified below.