 "Excellent reference book for today's engineer" | 2008-05-26 |
| - Reviewed By frankrose |
There was a time when all that was needed to get a digital PCB to work was to get all the nets connected correctly without any shorts. But with a high speed circuit, the PCB nets can be connected correctly and the PCB still won't work when it's built! That's because at the speeds that circuits run at today, circuit traces are no longer just connections; Instead, they inductors, transmission lines, RF stubs and antennas! To many designers, RF circuit design is like black magic (hence the title, a Handbook of Black Magic). But this book gives you an insight into what a high speed circuit is doing, and how to deal with these issues successfully.
Chapter 5 (Ground Planes and Layer Stacking) is especially useful for the high speed PCB designer. Understand this chapter and you will be well on your way to consistently getting high speed PCB layouts to work on the first try. You will also have an understanding of what to fix on PCB layouts that don't work.
|
| |
 "high speed circuit layout techniques" | 2006-05-21 |
| - Reviewed By hdaghighian |
| I bought this book based on a friend's recommendation seven years ago. I have used this book along with Henry Ott's book as a desk top reference for the past seven years. |
| |
| "Not the final word by any means, but a good introduction" | 2006-05-02 |
| - Reviewed By User: A1FVG9IO0MQHEY |
Add Johnson and Graham to the list of people who can write large, highly technical books full of useful, pertinent information, and package it all in a way that's mostly very readable and which mixes just the right blend of rigorous academic structure with good old-fashioned "when all else fails, you might get away with this" hacks. This book is by no means a thorough, academic grounding in the subject matter, but it works well as an introduction for people who have some background in conventional electronics, yet little or no background in the specifics of high-speed digital design.
Considering how specialized and complex the book's subject matter is, it's surprising how well the authors manage to avoid hard math; they obviously made a conscious effort to use the most intuitive formulas possible whenever they could. There are maybe a handful of differential equations in the book, but most of the math requires no calculus, just basic algebra. The moderately math-phobic should be able to handle this book if you can understand what derivatives and integrals are.
A bit of a rant: Everybody gets so hung up on the title! Did any of the people who complain that HSDD isn't really "black magic" actually bother to even open the book? Right in the preface, the authors explain that HSDD is regarded as something of a "black magic" by engineers because it isn't taught in most college programs, but "The authors would like to dispel the popular myth that anything unusual or unexplained happens at high speeds. It's simply a matter of knowing which principles apply, and how." The title is meant to be humorous, people; lighten up! A lack of a sense of humor is a sign of an ineffective engineer.
This book really is just an introduction. You're not going to go out and design a gigahertz-level PC motherboard when you've read it through, but it'll prepare you for more advanced material like the "Advanced Black Magic" sequel, and tons of similar advanced books on the market. The book's strength is in its easy writing style and broad, concise scope. Recommended for anyone who knows basic electronics but wants to become a professional signal electronics engineer. |
| |
| "Mostly a very solid book" | 2004-12-23 |
| - Reviewed By the_musicator |
| Great book. BTW, the author lists a LOT of errata on his website, enough to take over an hour to mark up my copy (5th printing). Although it's nice he documents this so well, it's a pain in the rear, so you may want to verify the edition you're buying to avoid this extra effort. On page vi, above ISBN, look for reverse sequence; example: "10 9 8 7" indicates 7th printing (cryptic, I know). Most recent printing is 15th edition (least amount of errata). The book is loaded with equations and diagrams. It would be nice to see more derivations, but at least the equations are there in the text, and in the appendix. I thought a few other reviewers were a bit harsh. The book is not perfect, but nevertheless a great resource. His second book is impressive, but more advanced; this original title is my "workhorse" book. also, check out his website (sigcon.com) for lots of articles and resources. |
| |
| "one of the best books around" | 2004-09-02 |
| - Reviewed By thissucksdude |
| I dont know what the other reviewers are blabbing about...being an ASIC designer myself..I felt this book was the best introduction I could get to cross-talk, signal integrity, EMC and Metastability. Been through and done that a lot of times, but still this is one of the best things around |
| |
 "Useful book if you need a cook book, however ........" | 2004-05-04 |
| - Reviewed By User: A35WQTMOZRCFPL |
| This book is useful if you want to have a long series of equations available in one place to jog your memory. But if you want to learn something useful and practical- and real-world - then perhaps you would be better off doing a web search for application notes, tutorial papers, and articles, particularly from semiconductor manufacturers, and vendors of high-performance test equipment such as Agilent, Tektronix, and others. To take one example (page 134,) Johnson purports to describe problems associated with a wire-wrapped prototype processor board containing TTL devices operating at high edge rates ( 2 ns.) According to Johnson, the design engineers failed to realize that the circuits would ring excessively, making the board unusable. To "prove" this he posits a model consisting of a 30 ohm TTL driver, with a 2 ns rise time, a 4" length of wire with 89 nH of self inductance, and a 15pf load - a series LRC circuit. Yes, this circuit will ring wildly, but the model is totally incorrect. The TTL input is not considered, which has a relatively low input impedance in the low state since it is current operated. This circuit -effectively a parallel LRC - does not ring nearly as much, as any experienced engineer knows. As a reality check, remember that wire wrap was successfully used for years by thousand of engineers. To listen to Johnson, though, this technology is almost unusable. Wire wrap circuits do ring, but under his example, the real amount of overshoot/undershoot is well within the limits of TTL. Further, no real circuit produces textbook looking traces, so the role of experience is to learn what worst-case design means, and what is acceptable for good manufacturing yield. Lesson: real experience teaches you how to produce correct, functional models. An incorrect model will cause you grief. Much could have been done here, to be useful, by way of analysis and of recommendation. The wire should have been modeled as part of a transmission line, not as a lumped element, which any high speed digital design engineer would know, and the idea of terminating a transmission line should have been introduced. This is standard fare. Even with the series LRC, instead of deriving the formula for critical damping, he instead says: "This approximation (reduce Q to .5) is derived from the solution to a second order linear differential equation describing an RLC low pass filter. First find the point at which the derivative of the solution passes through zero (a maximum point) and then evaluate the solution at that point." Got that? Take the derivative of a solution you want to find? Any book on circuits will reduce this to the solution of a quadratic equation. Obfuscating something that's really elementary does not help produce genuine insight. But this is what Johnson does throughout the book. Isn't it simpler to say that if you have fast rise time signals, treat most connections as transmission lines, and add termination resistors? As for a series RLC, use the formula for critical damping: R = 1/2 (sqrt(L/C)) |
| |
| "A disservice to an important and beautiful subject" | 2004-05-02 |
| - Reviewed By Anonymous |
| Superficially this books appears to be a treatise on the subject. But a more careful look reveals a lack of motivation, justification, or proof for any idea presented. Indeed there are no direct references to other authorities so as to allow the reader to either confirm a purported fact or take a deeper look at a particular point. What results, instead, is a compilation of alleged "facts" (none are proved and all are stated without proof) in cook book style. Even more, some of the formulas are not verifiable by spice simulation, and even conflict with other formulas bearing on the same issue. The overall impression of this book is that it is a hodge podge of ideas drawn from other sources, without any coherent theme. In the end Johnson performs a disservice to his readers by promoting the idea that the subject is nothing more than "black magic." It is not, and there are many other books and application notes stretching back decades which bear testimony to this fact. The very essence of the subject is a study of the effects of parasitic elements which become dominant in the presence of high edge rate signals. In this regard high speed digital design draws more heavily upon analog design, with a particular emphasis on rf design techniques. By leaving out all derivations, the reader is never truly educated on this subject and is thereby left in the dark. |
| |
 "An overview/summary with little theoretical development" | 2003-06-04 |
| - Reviewed By epiphenomenalist |
| An overview/summary of many basic concepts but with little theoretical development based on physical models. For example, the authors discuss transmission lines but don't trouble themselves to show the incremental circuit model of a transmission line or the differential circuit equations, they simply state the solution of the differential equations. Likewise the authors inadequately discuss how terminations affect transmission lines and fail to show how the reflection coefficient follow from the physical model. The point of showing the theoretical underpinnings is to make clear when the stated solutions are valid and more importantly, not valid. In ignoring the physical models, the authors do a disservice to their readers. An altogether disappointing book. |
| |
| "Easy to read, not too theoretical." | 2003-02-17 |
| - Reviewed By obarkan |
| This book will be a delight for digital designers who don't know much about signal integrity. It is very basic, doesn't use too much math or theory and covers a lot of fundamental useful concepts. There are original discussions that are not seen in many other books such as measurement techniques showing the effects of the ground clip of a probe on the measurement accuracy. Discussions on how to measure inductance and capacitance of traces are also very nice. There are easy to read sections on crosstalk. However, there are also quite a few sections that could have benefited from a more standard text book approach building the subject gradually. The books biggest weakness is also perhaps its greatest strength: It doesn't go into more rigorous derivation or theoretical discussions. Although this makes the book easier to read in general, sometimes actually it makes it harder to understand what is going on! For example, right in the very first pages in Figure 1.1 the author shows the frequency spectrum of a random digital waveform. There is no explanation of where it came from. I can understand no mathematical derivation existing, but at least the author should try to explain what is going on. It is also unsatisfying how some of the discussions are so intuitive but there is no simulation or theoretical proof of them. For example the author states "Use extra ground planes, not power planes, to isolate routing layers." Although there is some discussion of why this is recommended as usual there is very little to "prove" it by an example. If you want to learn about very advanced coverage of crosstalk and many other EMI/EMC ideas you should buy Clayton R. Paul's book "Introduction to Electromagnetic Compatibility." By the way that book has the most impressive coverage of how the spectrum of a digital waveform shown in figure 1.1 in "Black Magic" can be calculated. |
| |
| "Good book, but don't be led astray" | 2002-03-03 |
| - Reviewed By msm30 |
| First, I'll critique the sub-title: a handbook of Black Magic. High-speed digital design is not black magic. It is the application of science. The sub-title does the book a disservice. Second, I should caution young engineers that the authors of this book enumerate several stratagems in high-speed design; some good, some bad. That is, not all of the tricks in later sections are sound engineering practices. Experienced engineers will be able to differentiate between sound engineering practices and hacks, and when compromises should be made. Young engineers may be lead astray too easily. Lastly, this book is a good book if you already know something of the subject. If you had only to buy one book, I'd recommend "High-Speed Digital System Design: A Handbook of Interconnect Theory and Design Practices" ISBN: 0471360902. After reading that book, I'd purchase this book, as this book has some practical information, for example, on choosing capacitor dielectrics, oscillators, etc., not contained in the first. |
| |
Expedited Available
