This book offers a modern treatment of electronic devices and circuits in a systematic manner. Fundamental concepts like analog and digital integrated circuit design as well as operational amplifier theory and its applications have been covered in great detail. Switching regulators and other special electronic devices and circuits are also discussed in this text.Systematic analysis of the underlying principles of semiconductor devices like diodes, optoelectronic devices, MOS transistors, bipolar transistors, and junction field-effect transistors. Amplifier operation, biasing, logic circuits and small-signal models along with numerical examples and simulation results are presented in a lucid manner to encourage better understanding of the subject. Review problems are given at the end of each chapter. The book is suitable for undergraduate students studying in electronics and communication, electrical engineering, instrumentation engineering, computer science and engineering, and information technology branches.