EECS 1520 Lecture 4: CHAPTER 4
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EECS 1520 Full Course Notes
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2-to 5-volt range is high and is binary 1. Gate device that performs a basic operation on electrical signals. It accepts one or more input signals and produces a single output signal. Basic operations: not, and, or, xor, nand, nor. Circuits combination of interacting gates designed to accomplish a specific logical function. e. g. arithmetic, store values. The output value of one gate often serves as the input value for one or more other gates. The flow of electricity is controlled by the carefully designed logic of the interacting gates. Three different, but equally powerful, notational methods are used to describe the behavior of gates and circuits: boolean expressions, logic diagrams, truth tables. Boolean algebra: george boole invented a form of algebra in which variables and functions take on only one of two possible values (0/1, true/false, yes/no). Specific operations and properties in boolean algebra allow us to define and manipulate circuit logic using a mathematical notation.