Preface. List of Abbreviations and Symbols. 1. Introduction. 1.1 Motivation of the Work. 1.2 Organisation of the Book. 2. Digital Subscriber Line. 2.1 DSL in a Nutshell. 2.2 The Channel. 2.3 Modulation Techniques. 2.4 Solutions for xDSL Line Drivers. 2.5 Conclusions. 3. The SOPA xDSL Line Driver. 3.1 The Describing Function Analysis Method. 3.2 Behavior Model of the SOPA. 3.3 High Voltage SOPA Amplifiers. 3.4 Conclusions. 4. High Voltage Design Considerations...