High Speed Signal Propagation: Advanced Black Magic (Prentice Hall Modern Semiconductor Design Series' Sub Series: PH Signal Integrity Library)


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Authors:
  • Howard W. Johnson

Description:



High Speed Signal Propagation: Advanced Black Magic (Prentice Hall Modern Semiconductor Design Series' Sub Series: PH Signal Integrity Library)
Reviews:

starsthe "signal integrity" bible
Dr. Johnson gives signal integrity an identity, and tells you how to conquer a truly "black art" in electronics engineering.

As the data rates of electrical signals go up, the problems this causes are detailed, and solutions are presented that resolve the problems.

If youare doing high-speed digital design, high precision analog design, and want to make it work, this violume sheds light on the "dark" places.


starsGreat subject material, unevenly covered
I had mixed feelings reading this book. Some sections were so good I was saying, "Bravo, well done" while other sections were so bad, I felt sorry for anyone trying to learn by reading them. (E.g. Ch4 on frequency domain modeling.) The book covers extremely useful material, but in an uneven way. It will especially appeal to readers who want simplified discussions of the ideas rather than deeper more theoretical discussions. For example, crosstalk --one of the most important topics, is covered in a very light manner, recommending use of simulators to obtain accurate results. Compare this with the coverage of the same subject in the remarkable book "Electromagnetic Compatibility" by Clayton Paul. Now, that book is "advanced" and "magical". This book doesn't get into any deep discussions of the fundamentals. It says that current flows in a loop, and inductance is related to loop area. Simple enough. Yet, how do we explain the inductance of the pin of an IC package, which is definitely not a loop? How is the energy-based definition of inductance used by simulators related to this simple definition? Even more fundamental, given that voltage can't be defined in a region where the magnetic field is changing, how come we can use the concept of voltage? (Read Paul Clayton for discussing all these concepts in great detail.)

Many previous articles are included in the book. Although some of them are entertaining (e.g. the pot hole story) most are just disturbances, and even worse, outdated and contradictory to authors later approach. For example, Dr. Johnson spends 3 pages! discussing how close a termination has to be, and drives an equation for the amount of reflection when the ideal termination is slightly away from the source. Later in a witty article the author declares that there is no more any excuse for not using simulation tools. He says "If you have to ask, simulate it." Definitely anybody who is wondering if their termination is close enough can download a free demo copy of PSpice and simulate this quickly and accurately.Nobody is going to use the equation the author drived and there is no new insight or theory developed either.

The author being the editor of the IEEE Ethernet specs, it is quite surprising how many sloppy mistakes there are. (KHz, kHz, Ghz, HZ,Hertz, hertz, pS, ps, ohm, Ohm, V, v, ; with and without spaces after the value are used with no consistency, "it's" is confused for "its" in more than one place, wrong equation numbers, irregular figures, mixed fonts and fonts sizes within the same equation, etc. are common occurrence.)

Despite its problems, this book will be a very useful reference book to people working in the field. Many sections have excellent detailed discussions. For example, performance regions of the transmission line breaking it into lumped, RC, LC, skin effect, dielectric loss, and waveguide dispersion regions is the most comprehensive I have seen. A useful book to add to one's library, but not a book lover's delight.


starsA must have reference for ALL digital design engineers
After I by this book gepflogen had, I found it, in order to be a treasure trove of the useful information. It is layed out and well probably explained. As with their magic text of the first "black one", it is of the useful tips, from which fast up to the speed leaders and from rule'o'thumbs fully, those keep you, therefore can you it use and too received expected results from your Design. Well getaner Mr. Johnson and Mr. Graham, another excellent reference!



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