Combinational Logic: Part I

1/12/98


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Table of Contents

Review

Number systems

Sign and magnitude

Ones complement

Twos complement

Twos complement (con’t)

Overflow

The basics? binary numbers

Next subject: Combinational logic

Switches can compute simple functions!

Logic functions and truth tables

Logic functions and truth tables (con’t)

Minimal set of logic gates

Minimal set of logic gates

Mapping Boolean expressions to logic gates

What is the optimal gate realization?

Exploring different circuit implementations

Some notation

The mathematics: Boolean algebra

Digital (binary) logic is a Boolean algebra

Logic functions in Boolean algebra

Logic simplification using Boolean axioms

Useful laws and theorems

Useful laws and theorems (con’t)

Proving theorems

Proving theorems

Simplifying Boolean expressions

Simplifying Boolean expressions

de Morgan’s theorem

de Morgan’s theorem

Sum-of-products canonical form

Minterms

Product-of-sums canonical form

Maxterms

Canonical implementations of F = AB + C

SOP, POS, and de Morgan's theorem

Conversion between canonical forms

Incompletely specified functions

Truth table for a BCD-increment function

Notation

Author: Carl Ebeling

Email: cse-webmaster@cs.washington.edu

Home Page: http://www.cs.washington.edu//education/courses//370/CurrentQtr