Book excerpt: This comprehensive text fulfills the course requirement on the subject of Switching Theory and Digital Circuit Design for B. Tech. degree course in Electronics, Computer Science and Technology, Electronic & Communication, Electronic & Electrical, Electronic & Instrumentation, Electronic Instrumentation & Control, Instrumentation & Control Engineering of U.P. Technical University, Lucknow and other Technical Universities of India. It will also serve as a useful reference book for competitive examinations. All the topics are illustrated with clear diagram and simple language is used throughout the text to facilitate easy understanding of the concepts. There is no special pre-requisite before starting this book. Each chapter of the book starts with simple facts and concepts, and traverse through the examples and figures.