EMC for systems and installations
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Design Techniques for EMC – Part 1
Circuit Design, and Choice of Components
By Eur Ing Keith Armstrong CEng MIEE MIEEE
Partner, Cherry Clough Consultants, Associate of EMC-UK
This is the first in a series of six articles on best-practice EMC techniques in
electrical/electronic/mechanical hardware design, to be published in this journal over the following
year. The series is intended for the designer of electronic products, from building block units such as
power supplies, single-board computers, and “industrial components” such as motor drives, through
to stand-alone or networked products such computers, audio/video/TV, instruments, etc.
These articles were first published in the EMC Journal as a series during 1999. This version includes
a number of corrections, modifications, and additions, many of which have been made as a result of
correspondence with the following, to whom I am very grateful: Feng Chen, Kevin Ellis, Neil Helsby,
Mike Langrish, Tom Liszka, Alan Keenan, T Sato, and John Woodgate. I am also indebted to Tom
Sato for translating these articles into Japanese and posting them on his website:
http://member.nifty.ne.jp/tsato/, as well as suggesting a number of improvements.
The techniques covered in these six articles are:
1) Circuit design (digital, analogue, switch-mode, communications
PLS SAE,3Q. I EED I