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This book has been written primarily to serve as a textbook in accordance with the syllabus of
Digital Electronics course offered by MTU – Noida and GBTU – Lucknow. It is intended to provide a
student with clear understanding of the fundamentals of Digital Electronics with an emphasis on solving
large number of numerical problems that generally ask in their examinations.
The book has been organised accordance to the syllabus of MTU and GBTU. The complete syllabus
is divided into five units. The first unit introduce digital system, binary numbers and gate level
minimization technique.
The second unit cover the combinational logic circuits like adder, subtractor, comparator, multiplier,
decoder, encoder, mux, demux and designing. The third unit deal with the synchronous sequential logic
circuits and its designing. It cover all types of flip-flops, analysis of clocked sequential circuits, state
reduction and assignment. The second part of this unit deals with registers and counters.
The fourth unit outlines the construction of various primary memories and programmable logic
devices like PAL and PLA. The second part of this unit introduces design at the register transfer level
like ASMs. The fifth unit deals with asynchronous sequential circuits with races and hazards.
This book is a gradual development of our lecture notes on Digital Electronics used for last six plus
years. Our experience tells us that a text book, which is meant for learning a student, who trying to
understand subject for the first time, must clarify all the basic features of the subject in a most lucid and
systematic manner. This book is written with the same central idea, so that students can be benefitted
from this book with a greater sense of ease.
Illustrative large number of examples and solved problems with the previous year university questions
are interspersed throughout the book at their natural locations. These have been selected so that apart
from illustrating the concepts involved, all types of questions have covered which was asked in last
years university exams. For the basics, some short question and answer are given at the end of book
which cover all fundamentals and frequent ask queries.
In spite of our best care, it is just possible that some errors, printing mistakes etc. might have
occurred. We shall be thankful if the same are bought to our notice. Suggestions for further improvement
of the book will be thankfully acknowledged by the authors at
Prabhakar Sharma
Shilpa Sharma

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