Columns

This article discusses the topology and characteristics of a dc Line Impedance Stabilization Network (LISN), often referred to as an Artificial Network (AN).

How does safety work? That is, given a hazardous situation, how do we prevent injury from that situation?

A new symbol is being standardized for arc flash – and it’s an important step forward for safety.

If you are evaluating a design (i.e. power supply) from the EMI/EMC point of view, avoid replacing the real load with some kind of “equivalent resistor.” Differences can be really impressive.

Consider a spherical capacitor consisting of two concentric, conducive spheres separated by a dielectric.

Parasitic oscillations are one of the four typical causes for emissions in EMI/EMC problems. Try to reduce the gain or break the feedback and the problem could be solved at low cost.

Did you ever wonder why we use 0.1 ohm (and sometimes 0.5 ohm) for the ground impedance value for plug-and-socket connected equipment?

Consider a two-sided PCB with a single trace on top and full copper ground plane on the bottom.

The “power distribution system” is all parts of an electric system between the “bulk power source” and the consumer’s service-entrance equipment.

After causing a bit of a stir in the compliance testing industry in the last few years, the FCC recently defused some tension when they accepted a pair of US-based Accreditation Bodies to accredit laboratories in foreign lands.