The simplest combinational logic circuits are made by inverting the output of a fundamental logic gate. Despite this simplicity, these gates are vital. In fact, we can realize any truth table using a circuit made only from AND gates with inverted outputs.
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Tarnoff, David, "Episode 4.04 – NAND, NOR, and Exclusive-NOR Logic" (2020). Computer Organization and Design Fundamentals Series. https://dc.etsu.edu/computer-organization-design-oer/32
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