The textbook has been designed for the undergraduate students of Electrical and Electronics, Electronics and Communication, Computer Science, Electronics and Instrumentation, Information Technology and Electronics and Control Engineering. This book provides an accessible and practical treatment to many combinational and sequential circuits. Each topic has been discussed in sufficient depth to expose the fundamental principles, concepts, techniques which are necessary to understand the subject thoroughly. Salient Features of the Book Numerous worked-out examples highlight the need for intelligent approximation to achieve more accuracy in lesser time. Short answer questions at the end of each chapter help in easy understanding of the subject. Large number of review questions and unsolved problems to develop a clear understanding of basic principles. Previous GATE paper solutions are the unique feature of this book