When simplifying the expression for the output of a combinational logic circuit, you may encounter the XOR

Question:

When simplifying the expression for the output of a combinational logic circuit, you may encounter the XOR or XNOR operations as you are factoring. This will often lead to the use of XOR or XNOR gates in the implementation of the final circuit. To illustrate, simplify the circuit of Figure 4-24(a).

Figure 4-24(a)

A B C (a) ABCD ABCD AD z = ABCD +ABCD + AD