Interference Technology

For EMI / EMC Engineers

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Don’t Rely on the Stability of the Mains Frequency

 

My old colleague and good friend Tim Williams sent me the story below for inclusion in EMI Stories/Banana Skins, and I found it so interesting in so many ways that I decided to publish it as a Blog. In so very many EMC standards and other meetings on EMC, we hear that the stability of the AC mains power frequency is either ‘not an EMC issue’ or is ‘never a real EMC … [Read more...]

IQD Presents New Low Phase Noise Oscillators

 

One of the world’s best performing oscillators available from IQD As application requirements drive the need for greater data rates, more oscillator devices with ultra-low phase noise are required. This type of application is especially prevalent in today's connected world. Applications include fibre transceivers, gigabit Ethernet and 5G base stations. IQD is pleased to … [Read more...]

MIL-STD-461G Implications with RE102 Changes

 

Introduction: MIL-STD-461G was issued in December 2015 incorporating many changes throughout the document prompting user questions or interpretations.  Laboratory situations arise where the generic guidance requires specific situational decisions and the most common tests such as RE102 are included.  The user quickly realizes that the given direction does not make sense for a … [Read more...]

Würth Expands Popular Transformer Series

 

Würth Elektronik is pleased to announce the expansion of their popular MID-PPTI tiny push-pull transformer series. This series of parts can be used in a host of push-pull and pulse transformer applications and is found on dozens of reference designs. The four parts added to the MID-PPTI series include 750317828, 750317829, 750317830, and 750317331; all of which are AEC-Q200 … [Read more...]

Mains Harmonic Current Emissions are Always Bad – It is Risky to Rely on the Limits or Exclusions in the Standards

 

Many (perhaps all) of EMC standards that are listed under the EMC Directive, that set limits for mains harmonic emissions, have exclusions (‘let-outs’) for certain types of equipment, especially: (these examples are from IEC/EN 61000-3-2 Ed.5:2018) Lighting equipment with a rated power of less than but not equal to 5W Equipment with a rated power of 75W or less, e.g. … [Read more...]

Würth Elektronik Presents its New Common Mode Chokes

 

Chokes with Top Specs Waldenburg (Germany), 19 May 2021 - Würth Elektronik is expanding its portfolio of common mode chokes with two new models. The THT-mountable WE-FCLP for common-mode and differential-mode suppression, and the SMT data line and low-voltage common mode choke WE-CMDC. Both are available from stock without a minimum order quantity. The WE-FCLP has a … [Read more...]

EMC Confidence Checking

 

I was recently working with a manufacturer of stand-alone ticket machines, who had big problems with Ethernet-related emissions. Long story short – it was the Ethernet hub they had incorporated in their machine. They had assumed that all CE-marked Ethernet hubs would be equally good for EMC, and they had several different types lying around their design department. We tested … [Read more...]

EMC Question for 400Hz Power System

 

Question: I would appreciate it if you could provide your view / share your expertise on the EMC/EMI protection requirements between the  400Hz Ground Power Systems and the various ICT/ELV installations within an Aircraft. Answer: An interesting and important question! And much too big an issue to be able to deal with comprehensively, in a blog post. The … [Read more...]

Heilind Electronics Expands Cinch Connectivity Solutions Offering with Johnson SMA/SMPM Adapters

 

Heilind Electronics, a premier distributor of electronic components worldwide and an authorized distributor for Cinch Connectivity Solutions, has introduced the Johnson SMPM connector family to its portfolio of RF interconnects. This solution features a new set of SMA to SMPM between-series adapters targeted at 5G and other high-frequency test applications. Designed to provide … [Read more...]

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