Some Notes on Electromagnetic Compatibility (EMC)

The recent IEEE EMC Symposium was a reminder of the importance of design in both regulatory compliance and reliable operation of electronic equipment. Here are a few reminders of causes, effects, and meth ods of dealing with EMC problems. Cables can become antennas, Look out for box resonances, Don’t forget the DC circuits, Bypass capacitors, There is no perfect “ground”, All clocks are little RF transmitters, Board layout is critical, Know when to use shielding, Identifying self-interference, EMC immunity.