This book is designed primarily for courses in operational amplifiers and linear integrated circuits for Electrical, Electronics, Instrumentation, Computer Engineering and Applied Sciences students. The text has been written in a style to enable students to self study. Examples are provided throughout the book to help the students assimilate the material covered. The text is so designed that the teacher need not consult reference books. It offers fabrication technology for ICs, a wide array of opamp 741 applications, 555 timer, 565 PLL, linear voltage regulator ICs 78/79XX, 723, AD/DA converters, active filters using 741, switched capacitor filters and OTAs ,in a comprehensive manner. * Solved examples given throughout the book. * Laboratory experiments at the end of each chapter.