XNOR gates (exclusive-NOR) combine an XOR gate followed by an inverter. XNOR gates behave like the logical "either / or", operator followed by negation. The output is true if the inputs are the same, ...

Armed with a functional inverter, the next step was an OR gate. By combining NOT and OR gates, you can easily make a NAND gate, an AND gate, a NOR gate, and any other logic you can dream up.

Electronic logic gates are used extensively in digital systems and are manufactured as integrated circuits (IC s). The basic logic gates are the inverter or NOT gate, the AND gate, and the OR gate, ...