The fifth edition of Electronic Devices and circuits is designed for undergraduate engineering courses of electrical and electronics, instrumentation and control, and electronics and instrumentation. Earlier editions of this popular book already feature as one of the main recommended textbooks in several courses related to electronic devices and circuits of some of the major universities around the world. This edition offers a more complete coverage of the syllabuses of various universities, including those in India. Apart from a new chapter on active filters, this edition also covers circuit testing and troubleshooting methods, RC and LC power supply filters, tuned circuit amplifiers, and class C amplifiers. The book provides lucid explanations of the operation of all important electronic devices generally available today. Beginning with basic semiconductor and pn junction theory, the operation, characteristics, and parameters of each device are covered, and appropriate circuit applications are presented. Circuit design and analysis methods using the currently available devices and standard-value components are extensively treated.