Keith Armstrong

After working as an electronic designer, then project manager and design department manager, Keith started Cherry Clough Consultants in 1990 to help companies reduce financial risks and project timescales through the use of proven good EMC engineering practices. Over the last 20 years, Keith has presented many papers, demonstrations, and training courses on good EMC engineering techniques and on EMC for Functional Safety, worldwide, and also written very many articles on these topics. He chairs the IET’s Working Group on EMC for Functional Safety, and is the UK Government’s appointed expert to the IEC committees working on 61000-1-2 (EMC & Functional Safety), 60601-1-2 (EMC for Medical Devices), and 61000-6-7 (Generic standard on EMC & Functional Safety).

From This Author

Banana Skins

Banana Skins – May 2018 (#54-61)

We are proud to carry on the tradition of sharing Banana Skins for the purpose of promoting education for EMI/EMC engineers.

Banana Skins

Banana Skins – April 2018 (#48-53)

The Banana Skin columns were compiled by Keith Armstrong, of Cherry Clough Consultants Ltd, from items he found in various publications, and anecdotes and links sent in by the many fans of the column.

Banana Skins

Banana Skins – March 2018 (#28-47)

We hope you enjoy the column and look forward to continuing the tradition of sharing these valuable stories.

Banana Skins

Banana Skins – February 2018 (#20-27)

We regularly receive requests from readers to publish stories about real EMI/EMC problems faced by real engineers.

Design

Introduction to “EM Engineering”

Achieving electromagnetic compatibility (EMC) compliance is now straightforward, quick, and easy – using the EM Engineering process that Keith Armstrong describes in this article.

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Industry

Risk Management of Medical Devices Regarding Electromagnetic Disturbances

The risk management requirements of EN/IEC/ANSI/AMIEE 60601-1-2 Edition 3 (2007) and IEC 60601-1-2 Edition 4 (2014) are mostly either ignored or misunderstood by manufacturers, their EMC test labs, and medical regulatory assessors.

Fundamentals

Managing Risks Due to EMI Needs More Than Immunity Testing

It’s EMC, Jim, But Not As We Know It! (with apologies to The Firm1) Welcome to...

Testing

Complying With the EU’s EMC Directive Without 3rd Party Testing

A common path to achieving compliance to the European Union’s (EU’s) EMC Directive 2004/108/EC...

EMC Testing

Guide to Testing Conducted Emissions (Based on the Methods in EN 55022 and EN 55011) – Part 2

Conducted emissions testing may be carried out on an Open Area Test Site (OATS) intended for testing radiated emissions, but it is not necessary to use an OATS and conducted emissions can be tested relatively easily, with high accuracy, in the comfort of your own building.

Design

EMI Risk Analysis

The reliability of electronic technologies (including the software and firmware that runs on them) can become critical when the consequences of errors, malfunctions, or other types of failure include significant financial loss, mission loss, or harm to people or property (i.e. functional safety).

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Keith Armstrong

From This Author

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What's New

Military and Aerospace EMC: High Intensity Radiated Fields (HIRF)

FDA Issues Digital Health and AI Glossary

FCC Clarifies Satellite System Spectrum Sharing Rules

Practical Engineering: Using Welch-Satterthwaite Formula in Uncertainty Analysis

FCC Enforcement Bureau Convenes Regulators to Discuss Emerging Trends