In this completely reset and updated edition of this well received text, the author has taken the opportunity to extend the coverage considerably by adding new material throughout and including a completely new part on Passive Components. The three new chapters that make up Part 4 are entitled Capacitors, Soft Magnetic Materials, and Resistors. Other important additions to Part 3 on Applications are the inclusion of converter underlap, reversible converters, standby and uninterruptible supplies. To enhance further the book's value as a course text, extra examples and problems have been included.