NAND Logic
Because the NAND operation is functionally complete, NAND gates are one of the two basic logic gates, (the other being NOR logic) from which any other logic gates can be built. Due to this property, NAND and NOR gates are sometimes called "universal gates". However, modern integrated circuits are not constructed exclusively from a single type of gate. Instead, EDA tools are used to convert the description of a logical circuit to a netlist of complex gates (standard cells) or transistors (full custom approach).
Read more about NAND Logic: NAND, Making Other Gates By Using NAND Gates, NOT, AND, OR, NOR, XOR, XNOR
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