Sassan Tabatabaei, SiTime Corporation Electronic devices have to operate in close proximity, whether it is in the home, office, industrial establishment, or outdoors. Each of the devices may radiate electromagnetic energy, which can interfere with the operation of the rest of the devices. To avoid such harmful interference, governments and industry bodies limit the amount of … [Read more...]
USB Interface on Laboratory Surge Generators
Jeffrey D. Lind, Compliance West USA As any laboratory engineer knows, harsh, noisy lab environments often result in data loss and/or resets of test equipment or host computers. A potential solution to this challenge is the successful implementation of mains power distribution in the lab, and an isolated serial/USB design for laboratory computer systems. This will allow the … [Read more...]
EMC Performance of a Product Over Its Lifetime
Gert Gremmen, Tim Haynes, Ralph McDiarmid, Ed Price, John Woodgate EMC performance of a product is likely to vary with age as the physical characteristics change, e.g. caps dry out and metal junctions oxidize, etc. Obviously, the product is designed with the intention of consistent compliance over the life of the product, but are there any requirements or guidance relating to … [Read more...]
Effective EMC Troubleshooting with Handheld Probes
EMC testing is an unavoidable part of the development cycle for electronic products. As clock frequencies continue to increase, radiated emissions get harder to control. In an ideal world, the R&D engineer would test the emissions from his product early in the design stage and retest frequently as design changes were made, just ass he tests whether his product meets its … [Read more...]
1.04m Rod, Antenna Factor and Received Level in MIL-STD 462/461E Compared to MIL-STD 461F Test Set Up
David A. Weston, EMC Consulting, Inc., Merrickville, Ontario, Canada INTRODUCTION This paper shows that the antenna factor of the receiving rod antenna and the E field incident on it, from a standard source of radiation, both change when the counterpoise of the rod is either isolated from the ground plane on the table (new MIL-STD-461F set up), or connected, as per … [Read more...]
A Change in International EMC Legislation: Do Industrial Premises Become Outlawed?
During the last few years, many new EMC standards have been adopted; however, more and more standards are outside the scope of formal EMC legislation. The recent change in scope of IEC ACEC, CISPR and the new European EMC Directive creates new challenges for industry, as their focus will be aimed at the protection of the general broadcasting and communication services and of … [Read more...]
Electromagnetic Attacks Case Studies on Non-Protected and Protected Cryptographic Hardware Accelerators
Laurent Sauvage, Olivier Meynard, Sylvian Gulley and Jean-Luc Danger, Institut TELECOM, TELECOM ParisTech, Secure-IC S.A.S., Paris, France ABSTRACT Electromagnetic analysis (EMA) is an important class of attacks against cryptographic devices. In this article, we present two attacks to disclose the key of cryptographic implementations in FPGAs by taking advantage of EMA. The … [Read more...]
JEDEC and Tape & Reel Issues
This article is the second part of “The Dip Tube,” which appeared in May in the 2010 Interference Technology EMC Directory & Design Guide. A digital version is available at www.interferencetechnology.com. Over the past several years, both European- and U.S.-based organizations have sacrificed the traditional “internal auditing process” with over reliance on … [Read more...]
European EMC Directives
The United Kingdom’s interpretation of European EMC Directive 2004/108/EC and the policy and structure of the policing and enforcement of the UK EMC Regulations Graham Mays ABSTRACT This article initially describes the concept of European Directives and their legal status. It then discusses the European EMC Directive 2004/108/EC [EMCD] and how the United Kingdom interprets … [Read more...]
Conductive Heat-Shrink Tubing for EMI/RFI Cable Shielding
Heat-shrink tubing can provide a versatile EMI shielding solution. Emil E. Millas Methode Development Company Chicago, IL, USA With the proliferation of and demand for high-speed computer and data communications equipment, the susceptibility of such equipment to electromagnetic interference (EMI) and radio frequency interference (RFI) has become a growing problem and … [Read more...]
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