This book offers a systematic analysis of the underlying principles of semiconductor devices like diodes, microelectronic 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.Using precise definitions, clear methodologies, illustrative examples and graphs, this book starts by relating electronic instrumentation to physics. The book also explains the mechanisms of BJTs and semiconductor circuits.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, opto-electronics and other special electronic devices and circuits are also discussed in this text.