Tesis doctoral de José Alfonso Santolaria Lorenzo
Many methods for emi suppression have been developed in the last fifty years, most of them, showing a hardly change in its implementation. Traditional tools for emi suppression are related to the use of filters, shielding techniques and new methods for layout improvement. These hardware techniques are normally supported with waveform shapes having themselves a lower spectral content. This kind of signals makes part of a different concept of emi suppression that consists of limiting the spectral content in the signal itself. When possible, just waveforms with a lower spectral content should be used, this way making easier, simpler and cheaper the use of filters and other suppression means. In this line, emi-reduction techniques such a spread spectrum clock generation (sscg) are contributing to eliminate or limit the problem at the root, that is, at the signal itself. this thesis is developed in several parts, corresponding to different chapters. a summary of these chapters is presented onwards: after introduction in chapter 1, a wide theoretical development of the modulation and related concepts are presented in chapter 2. It is explained generically all aspects related to the modulation and particularly, to the frequency modulation. Main parameters of frequency modulation are presented and explained in detail and how practical considerations may affect to the theoretical behaviour of these parameters. Because the theoretical part of this thesis is completely based on the fundamentals of fourier transform, a sufficient explanation was thought to include for its right understanding . Finally, all this knowledge is summarized in a computational algorithm (matlab environment), capable of generating any frequency modulation of a sinusoidal carrier and the corresponding spectral components resulting from the modulation process. chapter 3 takes profit of the results obtained in chapter 2 where it is possible to obtain the theoretical behavi
Datos académicos de la tesis doctoral «Sscg methods of emi emissions reduction applied to switching power converters«
- Título de la tesis: Sscg methods of emi emissions reduction applied to switching power converters
- Autor: José Alfonso Santolaria Lorenzo
- Universidad: Politécnica de catalunya
- Fecha de lectura de la tesis: 01/07/2004
Dirección y tribunal
- Director de la tesis
- Josep Balcells Sendra
- Tribunal
- Presidente del tribunal: Antonio Rubio jose
- Antonio Orlandi (vocal)
- didier Magnon (vocal)
- Javier Sebastian (vocal)