Performance and reliability of a shielding system is essential in times of emergency. Wayne D. Martin, ETS-Lindgren, Glendale Heights, Illinois, USA The most cursory assessment of news and events around the globe during this first decade of the Twenty-First Century leads to the inescapable conclusion that we live in perilous times. Around the globe, political, ethnic and … [Read more...]
The New EMC Requirements of Electric Cars
Refinements are needed for better correlation between chip-level or module-level measurements and whole vehicle testing. Michael Koffink and Roland Gubisch, Intertek Testing Services, Boxborough, Massachusetts, USA The automotive EMC environment is in a constant state of flux as new onboard electric devices, communications media (both wired and wireless), and new drive … [Read more...]
RF Emission Reduction Techniques for ARM-Based Microcontroller Applications
A system's immunity can be enhanced without causing any functional drawbacks. Mart Coenen, EMCMCC bv, Eindhoven, the Netherlands INTRODUCTION With today’s digital designs and the time frame available for design-in, electrical system engineers and PCB designers are more or less forced to follow the application concepts provided by embedded device manufacturers. The … [Read more...]
Shielding of an EMG Machine Utilizing a Conductive Tent
Testers seek to remedy the longstanding problem of “noisy’ responses from an EMG instrument. Terence P. O’Laughlin and Michael J. Oliver, MAJR Products, Saegertown, Pennsylvania, USA INTRODUCTION This paper presents a shielding methodology and test in which an electromyography (EMG) instrument is shielded from spurious electromagnetic and radio frequency interference … [Read more...]
Low Frequency Magentic Shielding: An Integrated Solution
Innovative direct coating technique as an alternative to conventional foils Rich Emrich and Andrew Wang, Integran Technologies Inc.; Toronto, Canada INTRODUCTION Many electrically sensitive devices, such as transducers, sensors, detectors, and test instrumentation require protection from electromagnetic interference (EMI). Higher frequency interference is normally shielded … [Read more...]
The NRTL Program
A clear understanding of OSHA safety requirements and the objectives of the NRTL program can render the testing and approval process easier for electronics manufacturers. Regan Arndt, TÜV SÜD America, San Diego, California, USA INTRODUCTION The Occupational Safety and Health Administration (OSHA), an arm of the U.S. Department of Labor, is the primary federal agency … [Read more...]
Voltage Sag Testing for Industrial Equipment—and a New Power Quality Measurement Technology
An electrical product should be able to ride through any regular voltage sag. Andreas Eberhard, Power Standards Labs, Alameda, California, USA Immunity from voltage sags is vital for reliable operation of our ever-more-sophisticated electronic controls and equipment. Every electrical product should be able to ride through typical voltage sags, but in many cases the first sag … [Read more...]
Regulatory Agencies Upping Enforcement Actions
The FCC carries out random audits of products that have received recent TCB grants. David A. Case NCE, NCT, Cisco, Richfield, Ohio, USA The question that occasionally comes up, generally from someone not familiar with compliance, goes something like, “What will the Federal Communications Commission do to us if we are non-compliant, or how will the agency know?” Both questions … [Read more...]
Increasing Design Flexibility for Board-Level Shielding
Today's consumers want electronic devices in all shapes and sizes, a demand that can dictate the enclosure design and board shape. David P. Donaldson, Applications Engineer, W.L. Gore & Associates, Inc., Newark, DE, USA As electronic devices are getting smaller and as consumers are demanding more features, designing printed circuit boards (PCBs) is becoming increasingly … [Read more...]
EMI Reduction Techniques for High-Demand Consumer Applications
Innovative drop-in SSC solutions effectively manage EMI, preventing costly redesign, reducing production time and maximizing valuable circuit board real estate. Narendar “Buddy” Venugopal, PulseCore Semiconductor, Campbell, CA, USA INTRODUCTION As technology advances become even more sophisticated and applications become increasingly streamlined, traditional methods of EMI … [Read more...]
