Particularly the chapters on digital electronics have been updated and expanded for the second version of this book. Where necessary, a number of additions have been made to the analogue component. Additionally, optical components and circuits have been developed. Semiconductors, diodes, transistors, small- and large-signal amplifiers, OPAMPs, and their applications all fall under the category of analogue electronics. In order to emphasise their similarities and differences and provide a complete understanding of their parameters and specifications, BJT, JFET, and MOSFET are all covered in parallel. Logic gates, combinational circuits, IC families, number systems codes, adders/subtractors, flip-flops, registers, and counters are all included in the category of digital electronics. Particular emphasis is placed on sequential circuits, memory, and D/A and A/D converter circuits. Circuit and integrated device fabrication technique has also been covered. In addition, numerous fresh issues and situations.