Let’s take a look at what it takes to create some fun, out-of-the-ordinary gate implementations. As an example, let’s consider the AND gate (the others are OR, NOT, NAND, NOR, XOR and XNOR).

If you have free gates in an IC using them for a circuit instead of adding another IC, like an XOR, saves money and board space in a design. A useful design tool is the Karnaugh Map developed by ...