Switching Power Supply Used in Lighting Systems as Major Electromagnetic Noise Surce

Noise in electronic circuits are an undesired phenomenon. Complexity of electronics circuits determine an increasing of importance of EMC (electromagnetic compatibility) question. It is important to know the measurement system for a right measurement and decision. The switching power supply circuit is one of main source of noise in lighting equipment. Know of noise mechanism in switching power supply could help to reduce it under limits required by standards. Different noise suppression methods could be used to reduce the noise emission. Using of a suppression method depend by the type and frequency of signal noise too.