Columns

Reducing the duty cycle (the pulsewidth) reduces the low-frequency spectral content of the waveform, but does not affect the high-frequency content.

China’s homegrown “WeChat” application has nearly 900 million users. Need a car? Pay a check? Send someone some cash? Rate a dining venue? Make a video call? Send an endless series of silly emojis? WeChat is the platform, at least in China. It’s IM, Facebook, Tripadvisor and Skype all in one. And a gateway to to the Internet of Things.

Find out what you need to know to reassess your company’s product safety labels based on the latest revisions of ANSI Z535.4 and ISO 3864-2.

The article explains crosstalk between circuit traces, showing how signals propagate between nearby conductors through capacitive and inductive coupling. It demonstrates experimentally how reducing separation distance and adjusting ground plane proximity affects near-end and far-end crosstalk voltages in PCB microstrip configurations.

This issue’s topic is rather unique because this column addresses safety requirements for a non-safety critical device, “operational” or “functional” insulation.

As of June 13, 2017 all radio transmitters that are placed on the market in the European Union will have to comply with the new Radio Equipment Directive (RED) 2014/53/EU. This reality affects millions of devices destined for the EU.

What is a “level of protection”? What are “measures of safety”? Why do they apply only to electric shock and not to other injuries?

What happens when signals meet an impedance mismatch? Discover the elegant mathematics governing reflections and transmissions at transmission line discontinuities. Watch as voltage pulses navigate between different cable types, creating a predictable cascade of reflections that perfectly matches theoretical calculations.RetryClaude can make mistakes. Please double-check responses.

This article reviews some of the current thinking with regard to IoT. The range and scope of IoT is truly enormous so we’ll take a stab at the opportunities in for us EMC and wireless folks.

If your EMI filter is failing in high frequencies, check the frequency response of the components: parasitics limit the filtering effectiveness.