At a recent talk I gave in the Detroit region, I had the pleasure of meeting Joanna McLellan, an EMC consultant. I noticed on the back of her business card a list of her 10 Golden Rules of EMC. These are all simple, concise principles everyone should know. I thought having them all in one place, sort of as a cheat sheet, is such a great idea. She’s given me permission to reprint them here:
- Think wavelength, not frequency
- The longer you wait, the more you pay
- There is no such thing as ground above 100 kHz
- Conductors have length, phase change and inductance
- Two conductors separated by a dielectric is a capacitor
- Never use any more bandwidth than you need
- Add resistors rather than capacitors
- Keep node impedance below 10k Ohms
- Fractional wavelength is one thing, dimensions near or above a wavelength is another
- Welcome to the brave new world above 100 kHz
If you would like a copy of her business card with these rules printed on the back, so you can keep them in your pocket as a handy reference, drop her a note. You can learn more about her here.
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