The document I uploaded here is about computer logic and design course and contain additional info about processors also. it is a really easy and understandable stuff for a computer science student looking to clear his concept about gates , digital circuits, truth tables ,Boolean law and etc.
Class notes EL125 (125) Digital Logic & Computer Design
Class notes EL125 (125) Digital Logic & Computer Design
Basic Processing Unit
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University Of Karachi
Computer logic and design (C1)
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Penned By: FAISAL HAROON
COURSE: COMPUTER ORGANIZATION AND LOGIC DESIGN
ASSIGNMENT: LAB WORK
LOGIC GATES
COMBINATIONAL CIRCUITS
COMBINATIONAL LOGIC GATE SCHEMATIC:
The circuit in the diagram below uses two-input AND gates to provide a three-input AND gate
A
B
C
This is one method of producing a three-input AND gate
A truth table drawn for both circuits will show the logic function clearly:
C B A O/P
0 0 0 0
0 0 1 0
0 1 0 0
0 1 1 0
1 0 0 0
1 0 1 0
1 1 0 0
1 1 1 1
Table 5.1
, Task#1: Derive the truth table and Boolean expression for the output of the following logic
circuits.
Truth table for the above circuit:
_______
___ _ ___ _
R Q P P.Q R P.Q + R
0 0 0 1 1 0
0 0 1 1 1 0
0 1 0 1 1 0
0 1 1 0 1 0
1 0 0 1 0 0
1 0 1 1 0 0
1 1 0 1 0 0
1 1 1 0 0 1
The Boolean Expression of the above truth table is:
= RQPTask#2:
Implement circuit for the following equation:
Y=AB’+(C+D)’+ (D’E)’
Creating Truth Table for above Boolean expression:
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