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Interference Technology

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Interference Technology’s Top Ten Articles From 2005 to 2016

 

Each year, I like to capture the top “clicked on” articles. Knowing this will help me determine what topics readers feel are most engaging. The data will help me as technical editor round up articles for 2017 that will be equally compelling. Some of these topics include EMC basics, product design for compliance, EMC standards updates, medical EMC, vehicular EMC, and military … [Read more...]

Book Review – Grounds For Grounding: A Circuit To System Handbook

 

Proper grounding for the best EMC design is still one of the most hotly debated topics of all time within the EMC and product design communities. The problem is that what worked for a past product or system may not work for another using more recent technology or clock speeds. Likewise, a list of “Rules of thumb” aren’t applicable for all cases and, by their very essence, … [Read more...]

DoD E3 Conference Announcement

 

It is with great pleasure that the Defense Spectrum Organization invites you to attend the annual DOD Electromagnetic Environmental Effects (E3) Program Review after a four year hiatus! The upcoming conference will be held 3-7 April 2017 at the Gateway Club on Lackland AFB, San Antonio TX. As always, we will update you on the latest status of E3 within the Department … [Read more...]

Autonomous Vehicles – Ethics and Liability?

 

By Kenneth Wyatt Sr. Technical Editor, Interference Technology kwyatt@interferencetechnology.com One of the most exciting technologies today is the current development of semi-autonomous (driver assisted) and fully-autonomous vehicles. Dozens of manufacturers are rapidly developing autonomous, or self-driving, vehicles and related intra-vehicle and vehicle-to-vehicle … [Read more...]

Measuring Cable Resonance with a Comb Generator

 

by Kenneth Wyatt Cables are one of the key metallic structures on a product that can act as an antenna and couple energy, causing radiated emissions and possible compliance test failures. This has been discussed extensively in the literature on product design for EMI compliance. In many cases, they can resonate at their half-wave frequency and actually amplify any harmonic … [Read more...]

Budget SDR-Based Spectrum Analyzer

 

  While there are a number of affordable spectrum analyzers available to the product designer or EMC engineer, such as the Rigol DSA800-series or Siglent SSA3000X-series, I discovered an extremely low cost analyzer useable for general-purpose EMI troubleshooting. This tiny module (Figure 1) is actually a high quality software defined radio (SDR) that can tune from 24 … [Read more...]

Welcome to Mega Automotive

 

by Joanna Hill Today is Arnold’s first day at Mega Automotive. He is fresh out of college with an electrical engineering degree and is eager to meet his new boss, Mr. Buttsworth. Mr. Buttsworth: Hello Arnold welcome to Mega Automotive. I’m sure you’re going to like it here. It’s a fast-paced environment with lots to learn and loads of good people to work … [Read more...]

DC-DC Converter Noise Evaluation

 

By Kenneth Wyatt, Wyatt Technical Services LLCMore of my clients are starting to use small third-party DC-DC converters to provide the multitude of voltages required for today’s processor and DDR RAM ICs. While these are convenient to drop onto a circuit board, they can be quite a source of radiated and conducted emissions – especially those that switch in the MHz range.I … [Read more...]

CISPR 35 – How does it compare with CISPR 24?

 

After 15 years of work in CISPR Subcommittee I, the IEC Central Office published CISPR 35 Edition 1.0 on Tuesday, August 16, 2016.  The IEC webstore link is https://webstore.iec.ch/publication/25667.  In the US, ANSI has the standard available on their website as well.  Go to www.ansi.org and type in CISPR 35 in the search window for standards.  You must purchase a copy of the … [Read more...]

EMC & Its Role In Reliability

 

EMC and Its Role In Reliabilityby Ken Javor, EMC ComplianceTotally anecdotal, but this just happened to me.My wife uses a powered wheelchair. A very high end, high quality chair. We were on vacation driving north and had just crossed the 45th parallel in the state of Michigan. The 45th parallel anywhere is halfway between the equator and the North Pole. In Michigan it’s also … [Read more...]

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