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Using Spread Spectrum Techniques to Reduce EMI

Digital and power electronic systems can reduce the radiated and conducted emissions profile using spread spectrum techniques. Typically, no more than 10-12dB can be obtained with those techniques but the result can be useful to comply with regulations.

The Growing Trend: Multi-Symbol Product Warning Labels

As part of our series exploring the latest industry insight on effective product safety label design and symbol usage, this month’s topic focuses on the trend towards multi-symbol labels, showing both hazard description AND hazard avoidance visually – and ultimately moving to a fully graphic approach.

Letter to the Editor: Comparing Test Methods for EMI Gaskets

Regarding the article “Comparing Test Methods for EMI Gaskets” by George M. Kunkel (In Compliance Magazine, January 2016), both the text and the caption to Figure 2 mention shielding effectiveness tests performed on “newspaper”??

Dark Matters

On a recent visit to Beijing I picked up a copy of the China...

Electric Shock From Radios: A Review

During the 1930s, 1940s, and 1950s, Underwriters Laboratories did basic research in the field...
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Making the Most of 2016: Professional Development Options for Compliance Engineers

“Tell me and I forget, teach me and I remember, involve me and I...

VCCI Celebrates 30 Years of EMC and Technology Success

Back in my novice days, computers puttered along at 4.77 MHz and we rarely...

The Symbol Design Debate: Abstract Versus Representational

Last year’s "On Your Mark" columns discussed how specific symbols have changed over time...

View from the Chalkboard

By the time you read this, I will have completed my Fall semester undergraduate...

Reducing VHF Radiated EMI with an RC Snubber

If your product has a flyback power supply and radiated EMC problems are observed...
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