![]() ![]() Sources of EMI can sometimes be naturally occurring environmental events, such as electrical storms and solar radiation but more often than not, the EMI source is another electronic device or electrical system. What are Sources of Electromagnetic Interference (EMI)? ![]() What is Electromagnetic Interference (EMI)?ĮMI can be defined as electromagnetic energy which affects the functioning of an electronic device. Testing requirements for EMI and EMC can become quite complex, with a wide range of industry- and application-specific implications that must be considered when bringing a product to market. This energy can be propagated through the air as electromagnetic radiation, and/or conducted along (or coupled onto) interconnecting I/O or power cables, which is typically referred to as ‘ disturbance voltages’. We think of electronics as closed systems, but, the electricity flowing through circuits and wires is never fully contained. In this article, we attempt to demystify EMI and EMC, and to provide a basic, general overview of the types of testing equipment employed, and the respective requirements in each area.Īny electronic device generates some amount of electromagnetic radiation. Because they are related in many ways, it’s easy to confuse the two. ![]() The terms Electromagnetic interference (EMI) and electromagnetic compatibility (EMC) are often used interchangeably when referring to the regulatory testing of electronic components and consumer goods. ![]()
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