# 3 - ECSE-2610 Computer Components & Operations (COCO) Fall...

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ECSE-2610 Computer Components & Operations (COCO) Fall 2006 Part 3 Basic Boolean Algebra and Digital Circuits

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Representations of Basic Boolean Operations Boolean Variable : Can take value = 0 or 1. Boolean Expression : Also called a “logic expression” If a logic expression is false , it has value 0. If a logic expression is true , it has value 1. 3 Basic Boolean Operations : AND, OR, NOT Truth Tables: X AND Y 0 0 1 1 X Y 0 1 0 1 0 0 0 1 X OR Y Y 0 0 1 1 0 1 0 1 0 1 1 1 X NOT X 0 1 1 0 X Logic Gate: Graphical representation of a digital circuit which implements a basic logic operation.
Expressions and Gates for 3 Basic Boolean Operations Z = X also written Z = X' Boolean Expression Inverter Z X Gate NOT X 0 1 1 0 X Truth Table Z = X + Y OR X Y Z X OR Y Y 0 0 1 1 0 1 0 1 0 1 1 1 X Z = X • Y = X Y AND X Y Z X AND Y 0 0 1 1 X Y 0 1 0 1 0 0 0 1

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There are 16 possible unique functions for a 2 input gate There are 16 possible unique functions for a 2 input gate F0 0 0 0 0 F1 0 0 0 1 F2 0
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## This homework help was uploaded on 04/22/2008 for the course ECSE 2610 taught by Professor Ji during the Spring '08 term at Rensselaer Polytechnic Institute.

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3 - ECSE-2610 Computer Components & Operations (COCO) Fall...

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