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Digital Logic : Logic Gate (EASY)

DIGITAL LOGIC

1.      What is ‘Digital Logic’?
·         basis in digital computing
·         gives us an understanding how circuits and hardware communicate within the computer
·         use a sequence of numbers to represent the signal
-          basically use binary numbers (0 or 1)

LOGIC GATES

1.      What is ‘Logic Gates’?
·         a device that will perform a basic logical functions
·         fundemental to build a block of intergrated circuits
·         2 input
-          binary numbers (0 or 1)
·         some application of logic gate
-          diode
-          transistor
-          microprocessor etc.
·         can be represent by using Boolean expressions

 Name Graphical symbol Algebraic Expressions Truth Table AND $A \cdot B$ A B Y 0 0 1 1 0 1 0 1 0 0 0 1 OR $A+B$ A B Y 0 0 1 1 0 1 0 1 0 1 1 1 NOT $\overline{A}$ A Y 0 1 1 0 NAND $\overline{A \cdot B}$ A B Y 0 0 1 1 0 1 0 1 1 1 1 0 NOR $\overline{A + B}$ A B Y 0 0 1 1 0 1 0 1 1 0 0 0 XOR $A \oplus B$ A B Y 0 0 1 1 0 1 0 1 0 1 1 0 XNOR $\overline{A \oplus B}$  or  ${A \odot B}$ A B Y 0 0 1 1 0 1 0 1 1 0 0 1