By Dr. Eric Bogatin
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https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhwtIdXtD2kMGNjYTUxNzgtNGFmMy00N2ZlLThhNDMtZDc1MWFhZmM3ZDI2&hl=en&authkey=CIT99e0E
Introduction
There is not a single person involved with signal integrity and interconnect design who has not used the term inductance at one time or another. Yet, very few engineers use the term correctly. This is fundamentally due to the way we all learned about inductance in high school or college physics or electrical engineering.
Traditionally, we learned about inductance and how it related to flux lines in coils. Or we learned about integrals involving magnetic field densities. While all of these explanations may be perfectly true, it doesn't help us on a practical level. How many boards have you designed that have coils in them? We have not been trained to apply the concepts of inductance to the applications we face daily, related to interconnects in packages, connectors or boards. If you really want to understand what inductance is, at an intuitive level, and use it to help improve the performance of your products, forget what you've been taught in school, and read on.
read more at
https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhwtIdXtD2kMGNjYTUxNzgtNGFmMy00N2ZlLThhNDMtZDc1MWFhZmM3ZDI2&hl=en&authkey=CIT99e0E
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