Combinational logic
Sponsored Links
This presentation is the property of its rightful owner.
1 / 51

Combinational Logic PowerPoint PPT Presentation


  • 63 Views
  • Uploaded on
  • Presentation posted in: General

Combinational Logic. Outline. 4.1 Introduction 4.2 Combinational Circuits 4.3 Analysis Procedure 4.4 Design Procedure 4.5 Binary Adder- Subtractor 4.6 Decimal Adder 4.7 Binary Multiplier 4.9 Decoders 4.10 Encoder 4.11 Multiplexers. Introduction. Combinational Circuits.

Download Presentation

Combinational Logic

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Combinational Logic


Outline

  • 4.1 Introduction

  • 4.2 Combinational Circuits

  • 4.3 Analysis Procedure

  • 4.4 Design Procedure

  • 4.5 Binary Adder- Subtractor

  • 4.6 Decimal Adder

  • 4.7 Binary Multiplier

  • 4.9 Decoders

  • 4.10 Encoder

  • 4.11 Multiplexers


Introduction


Combinational Circuits


Analysis Procedure


Analysis Procedure Example


Analysis Procedure Example


Truth Table


Design Procedure


Design Method and Constraint


BCD To Excess-3 Code Conversion


BCD To Excess-3 Code Conversion


BCD To Excess-3 Code Conversion


Logic diagram for BCD-to-excess-3 Converter


1-Bit Half Adder


Implementation of Half Adder


1- Bit Full Adder


Implementation of full adder in sum-of-products form


Implementation of Full Adder With Two Half Adders and an OR gate


4- Bit Full Adder


Carry Lookahead Adder (1/7)


Carry Lookahead Adder (2/7)


Carry Lookahead Adder (3/7)


Carry Lookahead Adder (4/7)


Carry Lookahead Adder (5/7)


4-Bit Adder/Subtractor


Overflow Discussion


BCD Adder


Truth Table of BCD Adder


Logic Diagram of BCD Adder


Binary Multiplier


Bit by 3-Bit Binary Multiplier


Decoder


Three-to-Eight Line Decoder


Demultiplexer


Decoder Examples

  • 3-to-8-Line Decoder: example: Binary-to-octal conversion.

D0 = m0 = A2’A1’A0’

D1= m1 = A2’A1’A0

…etc


Implementation


Encoder

z

=

D

+

D

+

D

+

D

1357

The encoder can be implemented

y

=

D

+

D

+

D

+

D

2367

with three OR gates.

x

=

D

+

D

+

D

+

D

4567


Encoder


Priority Encoder


Priority Encoder


Priority Encoder


4-11 Multiplexers


4-to-1-line multiplexer


Quadruple two-to-one-line multiplexer


Boolean function implementation


Three-State Gate


Four-to-One-Line Multiplexer


  • Login