Lecture 2-1 Principals of Arithmetic Functions

We studied functional building blocks of arithmetic computation: Half-adder and full-adder. Using these blocks as functional cells, we can build up an array of interconnected cells to do addition of bit stream.

Thanks to the complement and fundamental functional circuits (XOR, Selector), we can build up an iterative array of full-adders to do both addition and subtraction, which is the key component for programable digital circuits.