Fully updated and revised this new edition of this popular text covers the BTEC HNC/D unit in electronics, which deals mainly with analogue electronics. It contains many practical examples and exercises to help the reader understand the theory presented and, in line with current technology, the book concentrates on the use of integrated circuits. Electronics 4 is essential for BTEC HNC/D courses in electrical, electronic, communications and computer engineering. It will also be useful for first year degree students of electrical engineering.