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Electromagnetic Compatibility Engineering [Englisch] [Gebundene Ausgabe]

Henry Ott

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Kurzbeschreibung

11. September 2009
Praise for Noise Reduction Techniques IN electronic systems
 
"Henry Ott has literally 'written the book' on the subject of EMC. . . . He not only knows the subject, but has the rare ability to communicate that knowledge to others."
--EE Times
 
Electromagnetic Compatibility Engineering is a completely revised, expanded, and updated version of Henry Ott's popular book Noise Reduction Techniques in Electronic Systems. It reflects the most recent developments in the field of electromagnetic compatibility (EMC) and noise reduction¿and their practical applications to the design of analog and digital circuits in computer, home entertainment, medical, telecom, industrial process control, and automotive equipment, as well as military and aerospace systems.
 
While maintaining and updating the core information--such as cabling, grounding, filtering, shielding, digital circuit grounding and layout, and ESD--that made the previous book such a wide success, this new book includes additional coverage of:
* Equipment/systems grounding
* Switching power supplies and variable-speed motor drives
* Digital circuit power distribution and decoupling
* PCB layout and stack-up
* Mixed-signal PCB layout
* RF and transient immunity
* Power line disturbances
* Precompliance EMC measurements
* New appendices on dipole antennae, the theory of partial inductance, and the ten most common EMC problems
 
The concepts presented are applicable to analog and digital circuits operating from below audio frequencies to those in the GHz range. Throughout the book, an emphasis is placed on cost-effective EMC designs, with the amount and complexity of mathematics kept to the strictest minimum.
 
Complemented with over 250 problems with answers, Electromagnetic Compatibility Engineering equips readers with the knowledge needed to design electronic equipment that is compatible with the electromagnetic environment and compliant with national and international EMC regulations. It is an essential resource for practicing engineers who face EMC and regulatory compliance issues and an ideal textbook for EE courses at the advanced undergraduate and graduate levels.

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"This is an outstanding book. At 872 pages thick, it is a valuable follow-up to Ott's earlier books, Noise Reduction Techniques in Electronic Systems (first edition, 1975; second edition, 1987) ... EMC will remain with us in the foreseeable future, and we need books like this one." (The Radio Science Bulletin, 1 June 2011)

Buchrückseite

Praise for Noise Reduction Techniques IN electronic systems
 
"Henry Ott has literally 'written the book' on the subject of EMC. . . . He not only knows the subject, but has the rare ability to communicate that knowledge to others."
-EE Times
 
Electromagnetic Compatibility Engineering is a completely revised, expanded, and updated version of Henry Ott's popular book Noise Reduction Techniques in Electronic Systems. It reflects the most recent developments in the field of electromagnetic compatibility (EMC) and noise reduction¿and their practical applications to the design of analog and digital circuits in computer, home entertainment, medical, telecom, industrial process control, and automotive equipment, as well as military and aerospace systems.
 
While maintaining and updating the core information-such as cabling, grounding, filtering, shielding, digital circuit grounding and layout, and ESD-that made the previous book such a wide success, this new book includes additional coverage of:
* Equipment/systems grounding
* Switching power supplies and variable-speed motor drives
* Digital circuit power distribution and decoupling
* PCB layout and stack-up
* Mixed-signal PCB layout
* RF and transient immunity
* Power line disturbances
* Precompliance EMC measurements
* New appendices on dipole antennae, the theory of partial inductance, and the ten most common EMC problems
 
The concepts presented are applicable to analog and digital circuits operating from below audio frequencies to those in the GHz range. Throughout the book, an emphasis is placed on cost-effective EMC designs, with the amount and complexity of mathematics kept to the strictest minimum.
 
Complemented with over 250 problems with answers, Electromagnetic Compatibility Engineering equips readers with the knowledge needed to design electronic equipment that is compatible with the electromagnetic environment and compliant with national and international EMC regulations. It is an essential resource for practicing engineers who face EMC and regulatory compliance issues and an ideal textbook for EE courses at the advanced undergraduate and graduate levels.

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5.0 von 5 Sternen Henry Ott Does It Again! 12. April 2010
Von EMC Engineer - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe
Introduction and Summary - Henry Ott has been a well-known expert and consultant in electromagnetic compatibility (EMC) for a number of years during his career with AT&T Bell Labs, and as a full-time consultant since leaving Bell Labs. His first book, Noise Reduction Techniques in Electronic Systems, was written in 1977 and a revised second edition was published in 1988. While the basic information in the second edition remains much the same, technology has marched on dramatically, rendering some of the concepts and solutions somewhat antiquated. So, it was with great interest, that I learned of Ott's most recent book, Electromagnetic Compatibility Engineering (2009), which was a complete rewrite and now twice as thick, with 843 pages (ISBN 978-0-470-18930-6, $96.00 through Amazon.com).

There are now 18 chapters with six appendices - nine of which, have been completely rewritten. Both analog, digital and mixed-signal circuit design principles are covered, as well as frequencies from audio through GHz. Ott strives to balance the theory with practical applications gleaned from his years as a consultant. The theory is explained so it's easily understood by product design engineers. Solved problems are included, so as to make this text appropriate for upper-level college courses.

After reading his text, I come away very impressed with the content. This is a book addressed to the working product designer - not for those trying to learn the theory. For that, I would suggest Clayton Paul's book, Introduction to Electromagnetic Compatibility (2nd. edition), or several other like texts. However, Ott includes just enough theory to help explain the basic concepts. I believe this is best for the designer, as they rarely have the time to delve too deeply into the theory in order to solve compliance issues. Understanding the basics gives them at least a chance to apply possible fixes to different situations.

The one terminology I wish Ott had used in the book was "signal return plane" and "power return plane", rather than "ground plane". While the latter is the common vernacular, it is often misleading as to the "other half" of current flow. In addition, there is much recent research done with decoupling capacitor placement, circuit layout and cancellation techniques from Missouri University of Science & Technology ([...] which was not included. This is a relatively minor nit, as one should be able to extrapolate the basic concepts described by Ott and apply these to ball-grid arrays and other mega-IC devices.

In summary, Ott's new book on EMC design is a complete reference for the average product designer to be able to achieve some success in product qualification. Highly recommended.

Discussion of Chapters:
The following discussion relates to Ott's previous text, Noise Reduction Techniques in Electronic Systems, (2nd. edition).
Chapter 1 - Electromagnetic Compatibility. The section on regulations has been updated and includes U.S., Canadian, European and U.S. military standards.
Chapter 2 - Cabling. Includes minor updates, but with additional information on cable shields and shield terminations.
Chapter 3 - Grounding. This is a major update; which now also includes AC power distribution, earth grounds, signal grounds and system grounding.
Chapter 4 - Balancing and Filtering. A moderate update, which goes into much more information on cable balancing, common-mode rejection ratio (CMRR,) balanced loads and differential and instrumentation amplifiers.
Chapter 5 - Passive Components. Resistance and inductance of rectangular conductors and a new section on transmission lines has been added. The section on ferrite beads was expanded a bit.
Chapter 6 - Shielding. Additional information was added for multiple apertures, transfer impedance, seams, internal shields, conductive plating and cavity resonance.
Chapter 7 - Contact Protection. Largely includes the same material, covering transient suppression and electrical contact protection of mechanical and transistor switches, as well as switched inductive loads.
Chapter 8 - Intrinsic Noise Sources. Unchanged...covers thermal noise, equivalent noise bandwidth, shot noise, contact noise, popcorn noise and random noise measurements.
Chapter 9 - Active Device Noise. This chapter is mostly unchanged; covering noise factor signal-to-noise ratio, measurement of noise voltages and currents, cascaded stages, bipolar and FET noise and noise in op-amps.
Chapter 10 - Digital Circuit Grounding. This is now a complete rewrite, which includes the previous information on noise sources and loop areas, but now has a lot more information on power distribution methods using striplines, assymetrical striplines, ground plane impedance and resistance and digital logic current flow.
Chapter 11 - Digital Circuit Power Distribution (NEW). Here Ott goes into some depth on how to best distribute DC power. Transient loads are discussed with methods to decouple them from the power bus. Decoupling capacitors and decoupling strategies are covered. The pros and cons of multiple decoupling capacitor strategies (same value, different values) based on Archambeault's research is covered. Embedded capacitance in PC boards is covered in some depth, as well as power supply isolation. The effect of decoupling capacitor mounting and placement is also explained.
Chapter 12 - Digital Circuit Radiation. Mostly the same material, except he added the concept of canceling loops and dithered clocks to control differential-mode radiation. Much more emphasis was spent on common-mode radiation and how to control it, as this is typically the predominant radiation from products today. The measurement of common-mode currents has been moved to Chapter 18 (Pre-Compliance Measurements).
Chapter 13 - Conducted Emissions (NEW). This is a major addition to the previous book. He includes material on power line impedance, LISNs, switch-mode power supplies and the resulting common-mode and differential-mode emissions. The effect of the filter capacitor ESL and ESR is discussed, as well as rectifier noise and snubber circuits. There's a whole section on power line filters, including leakage inductance, mounting and magnetic coupling. He included a section on variable-speed motor control here - a hot topic for those designing industrial controls or electric vehicles. Finally, , he wraps up the chapter with a discussion of active power factor control.
Chapter 14 - RF and Transient Immunity (NEW). Here's another new chapter covering radio frequency (RF), electrically-fast transient (EFT), electrostatic discharge (ESD) and lightning immunity. He discusses simple filter topologies for reducing susceptibility to RF fields. He then moves on to describe the other main transient waveforms; ESD, EFT and lightning surge. He then discusses various suppression networks. He wraps up with a short description of power line disturbances (dips and interruptions).
Chapter 15 - Electrostatic Discharge. This moderately updated chapter now includes a discussion of energy storage for various shaped objects. He now uses a lady in the human body model - giving the other gender their due! The section on equipment design has been reorganized and expanded and there is a new section on ESD grounding and protective measures for ungrounded (portable) products.
Chapter 16 - PCB Layout and Stackup (NEW). This is an all-new chapter, which was obviously missing in Ott's last book. He starts out by discussing component placement and sectioning of major circuitry to reduce digital noise coupling. He discusses critical signals, such as clocks, and isolating these from the I/O area of the PC board. He includes the important concept of slots in ground & power planes and their effect on return currents. The related subject of changing reference planes for return currents is included. The last half of the chapter should be welcome news to PC board designers, as it includes best practices for board stackups from 4 through 12 layers. Each example is compared to Ott's "six multilayer board objectives".
Chapter 17 - Mixed-Signal PCB Layout (NEW). It seems PC board design for mixed signals (analog and digital) is a very confusing subject for most board designers. Ott starts off with a discussion of split planes and how to interconnect traces between the two. He then moves on to focus on return current paths and how to keep the return currents from coupling between the two areas. Ground and power routing for mixed-signal ICs, such as A/D and D/a converters, as well as decoupling is also included. Finally, industrial process controllers and their unique issues (low-frequency transients getting into the digital circuitry) is discussed.
Chapter 18 - Precompliance EMC Measurements (NEW). This chapter has been reorganized and updated with some of the latest bench-top measurement techniques. Very often, simple pre-compliance measurements may be made to assess the EMC "health" of a product prior to transporting and measuring its compliance at the test lab. Ott shines here as he pulls in material from many of his public seminars on "Workbench Measurements". New in this chapter is the home made passive differential probe design by Douglas Smith. The information on test methods has been expanded to include how to separate the common-mode from the differential-mode currents in power lines. He discusses spectrum analysis and the differences between peak, quasi-peak and average detectors, then goes on to explain which detector to use for the different tests. He describes how to approximately correlate 1m radiated emission testing with electrically small active antennas to the FCC Class A and B limits for purposes of troubleshooting. The remaining chapter deals with testing various transient immunities. One interesting example is the use of a Dremel® motor tool as a broadband noise source.
There are several appendices, which contain useful information.
Appendix A - The Decibel. This has been rewritten for clarity.
Appendix B - The Ten Best Ways to Maximize the Emissions in Your Product (NEW). This is a "tongue-in-cheek" list of poor EMC design practices.
Appendix C - Multiple Reflections of Magnetic Fields in Thin Shields. This is a repeat.
Appendix D - Dipoles for Dummies...(NEW). This includes simplified theory of radiating dipole antennas and demonstrates various dipole structures commonly found in products. This was pulled from one of his popular public presentations.
Appendix E - Partial Inductance (NEW). This is some rather high-powered, but important, theory deriving the concept of partial inductance. Much of this material is from work done by Clayton Paul. It includes an experimental setup for measuring the voltage drop in a ground plane.
Appendix F - Answers to Problems.
9 von 10 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen For Analog Designers, Too 23. April 2010
Von Analog Engineer - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe
As other reviewers have said, this is a great reference for EMC issues, and I wholeheartedly agree. As an analog
engineer, though, I find it extremely valuable for analog design, too. It's not surprising that so many respected
analog designers refer to Henry Ott's work.

Anyone involved in the design of mixed-signal (analog and digital) printed circuit boards will find a goldmine
of information in the chapter covering this topic (Chapter 17: Mixed-Signal PCB Layout). The rationale for using or not using split ground planes is clearly explained, and it is likely that many designers, including this reviewer, have been doing it improperly and creating noisier PCBs that result in noisier analog signals. More often than not, it is better not to split the ground plane, but parts placement is the key. This chapter alone is worth the price of the book.

Chapter 4: Balancing and Filtering thoroughly covers the topic of balanced circuits and includes the entire signal chain: the driver, the cable, and the receiver (both transformer-input and op-amp-input based). Anyone working with low-level analog signals (audio engineers, instrumentation engineers) will find this chapter very valuable. Also of great value is the chapter on cabling (Ch. 2). It clearly explains how and under what circumstances cable shielding works to guard against electric and magnetic interference, and the differences between coaxial cable and twisted pair connections. As an engineer working in the audio field, this is a definitive reference for analyzing the performance of single-ended (coax) and balanced ("XLR") audio connections,
including the topics of ground loops and how and where to ground the shield of a cable (as is specified in the Audio Engineering Society's standard addressing this, AES48, 2005).

Chapter 6: Shielding will provide the information needed to determine if it's even possible to effectively shield a circuit from interference and, if it is possible, what material(s) will do the job and how to design the shield. Many times shielding is added to a design and provides no benefit, but only increases cost; this chapter will help you avoid a bad decision like this.

Also, the book is a great reference for many analog engineering topics like calculating the noise in a resistor or op-amp circuit, the differences between ideal and real-world passive components, etc. The book has become a frequent reference for a variety of engineering issues, not just EMC.

Getting back to EMC, Chapter 18: Precompliance EMC Measurements -- another wonderful example of Henry Ott's ability to provide clear, concise, practical information to the working engineer -- has numerous examples of simple, straightforward EMC tests that can be performed in a development lab, with reasonably priced test equipment. Without a doubt, you'll save a trip or two (or more!) to an expensive EMC test facility if you use these methods to discover your product's problem areas and fix them before going to a certified EMC test site. Related to this chapter is Appendix B: The Ten Best Ways to MAXIMIZE the Emission from Your Product. It's a quick and entertaining read, but is packed with information for the designer to identify the areas and mistakes very likely to cause EMC problems with a design. These three appendix pages should be read by everyone involved with a project -- electrical engineers, mechanical engineers, and project managers -- to make sure these errors don't make their way into the design.

A well-written and immensely useful book, it is very deserving of the 2009 Association of American Publishers award it received.
6 von 6 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen Major Update of an Essential Reference 25. Oktober 2009
Von Jim Brown - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe|Verifizierter Kauf
EMC authority Henry Ott's new book is out, and it's a beauty. It's nearly twice the size of his previous book. There's lots of new material, including coverage of the Pin 1 problem (with credit to Neil Muncy) and SCIN. There's also an excellent analysis of switch mode power supplies and variable frequency drive motor controllers, with specific recommendations for minimizing the massive noise they produce.

Many of the earlier chapters have significant updates, and there are lots of other new topics, analog and digital designs and printed circuit board layout issues, as well as updated information on EMC regulations. A section on mains power focuses on North American practice.

There's also the very useful development of an equation for partial inductance -- that is, the inductance of a conductor "in free space" that does not form a loop, which is then reconciled with equations for loops by applying the partial treatment to each element of the loop. This is quite helpful in understanding fundamental practical applications like the inductance of a
length of wire in a grounding path. The only other place I've seen an equation to cover this problem is in Terman's 1943 book. Ott's and Terman's equations are a bit different, but provide results that are within 5% of each other for practical problems. A friend recently reminded me that Clayton Paul's excellent book also covers this concept.

No surprise -- Henry's analysis is always spot on and his writing style easy to follow. He never "hides behind the math, but there's enough to allow quantification of each principle being discussed. This book ought to be on the bookshelf of every EE, no matter the discipline.

Jim Brown
Chair - Technical Committee on EMC, Audio Engineering Society (AES)
Vice-Chair, AES Standards Committee Working Group on EMC
4 von 5 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen Henry Ott's new book on EMC is an instant classic 29. September 2009
Von William A. Bush - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe
Henry Ott is a rare talent in EMC. Equally excellent as a designer, researcher, troubleshooter, writer and educator. His new book on EMC Engineering (a complete remake of the Noise Reduction Techniques for Electronic Equipment 2nd Edition) is a "near work of art" in depth of coverage and clear and concise presentation. Readers at any level of capability can be greatly rewarded by perusing this book. Henry does an excellent job of providing quality references whereby derivations can be justified. Many figures are provided such that the visual concept can be readily grasped. Several figures are eloquent compilations of mutifaceted information presented in a manner that it is obvious much time and thought went into how to develop such a figure. EMC is investigated from many perspectives such as digital, analog, signal integrity, parasitics, reactance, power, grounding, protection, cabling, antennas, self contained unit or distributed systems, sinusodals to square waves, and on and on. It is a complete work leaving little undone. For the brave, there are numerous practice exercises at the end of each chapter. Several appendices delve further into niche items. The one on inductance is quite well done and the best I have seen to date on the subject. I especially like how Henry has "bellied up to the bar" and inserted first person on certain items he feels very strongly about. I have a reasonable library on EMC and many of them I consider valuable contibutions to the discipline. But if I had to utilize only one resource at this time, it would be Henry's new book. Bravo to Henry and Wiley for a great contribution to the EMC discipline.
1 von 1 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen EMI discussed in an easy way to understand 17. Januar 2013
Von Donn E. Gabrielson - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe|Verifizierter Kauf
This book is very readable, for an EE anyway. The basics of Electromagnetic Compatibility are discussed with insights into how to design systems that can pass the emissions requirements.
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