Author: Mr. Mukesh Kumar

ISBN: 978-81-69857-84-0

DOI: https://doi.org/10.59646/841

Date of Publication: October 07, 2026

Preface

Digital electronics is the engineering discipline concerned with the representation, processing, storage and transmission of information using discrete logic states. Almost every modern electrical and electronic system contains digital hardware: computers, smartphones, communication equipment, industrial controllers, electric vehicles, power-electronic converters, medical instruments, smart appliances, measurement systems and embedded controllers. A student who understands how a handful of logic gates can be combined into adders, counters, memories and processors gains an insight that remains useful throughout an engineering career.

This book is designed as a bridge between first principles and engineering practice. The sequence begins with binary information and number systems, develops Boolean algebra and logic gates, and then progresses through logic minimisation, combinational circuits, sequential circuits, state-machine design, logic families, memories, programmable logic, data converters, hardware description languages and FPGA-based implementation, and finally practical design techniques with complete case studies such as a digital clock, a frequency counter, a UART and a PWM generator for power converters, and a closing chapter that shows how these building blocks combine into microprocessors and microcontrollers. The coverage matches the Digital Electronics / Digital Logic Design / Digital System Design syllabi of most Indian technical universities and is equally suitable for GATE, ESE and placement preparation.

Each chapter follows the same pattern:

• Concept development in simple language, with symbols defined when first used.
• Figures — logic diagrams, truth tables, Karnaugh maps, state diagrams and timing diagrams — placed next to the text they explain.
• Solved examples, graded from simple to examination-level, with complete step-by-step working.
• Practical notes that connect the theory to real integrated circuits (74xx/74HCxx/40xx families), breadboards, simulators and FPGAs.
• Key points that summarise the chapter for quick revision.
• Exercises in three parts: multiple-choice questions (with answers), short-answer questions and long-answer/numerical problems (with answers to numerical problems).

The writing follows a beginner-friendly approach: concepts are introduced before mathematical detail, and important results are reinforced through numerical examples. Practical sections are included so that students can move from truth tables and Karnaugh maps to breadboards, integrated circuits, simulation and FPGA-oriented design.

A complete laboratory manual of twelve experiments, a formula sheet, a question bank with model university question papers, a glossary, an IC reference, solutions to selected problems, 120 short questions with answers for viva and two-mark preparation, and a simulation and FPGA tool guide are provided at the end of the book.

The book can be used for a one-semester course of about 45–50 lecture hours, for a two-semester sequence (Digital Electronics followed by Digital System Design), or as a reference during laboratory work and project development. Suggestions from teachers and students for improving the book are always welcome.