Electromagnetic compatibility (EMC) has become a major challenge for equipment and switching power supply designers. As more and more countries apply EMC regulations on products entering their respective markets, EMC compliance of a product has become a major factor defining its acceptance.
The EMC challenge has two parts:
Suppression of interference at the source.
Making devices or systems immune to EMI.
There are three general approaches to suppressing of EMI:
Good screening for radiated EMI.
Proper earthing.
Filtering of power and signal lines to reduce conducted EMI.
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