Past Columns

In a recent discussion with a third-party certifier, there was an implication that a...

Ferrites for EMI suppression are usually chosen looking for high (resistive) impedance at the...

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.

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

During the 1930s, 1940s, and 1950s, Underwriters Laboratories did basic research in the field...

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

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

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

The measurement of Specific Absorption Rate (SAR) is arguably the most complex of compliance issues, affecting thousands of new device models and billions of radio transmitters.

This UL Bulletin of Research on the electric fence contains much information that applies to much more than just the electric fence. This is why it is a classic work.