![]() ![]() The European Community was one for the first areas where EMC requirements were enforced. Some started to issue directives to the manufacturers of electronic equipment, defining standards that the equipment should meet before equipment could be sold. The opened up these circuits to the effects of EMI, and realisation grew of the need for EMC precautions to be incorporated into the design if these items were to work satisfactorily in the real world.Īs a result of this growing realisation, many nations became aware of EMC as a growing problem. Not only did these damage the electronics equipment, but they could also set false triggers.ĭuring the 1970s the use of logic circuitry grew rapidly, and with this the switching speeds increased. Later the risks to electronics equipment associated with ESD became visible. Also the effects of high powered radar systems on equipment were also a concern. After the Second World War, with the rise in importance of nuclear weapons, the electronic pulse generated by an explosion and its effect on equipment became a concern. Some of the first major concerns of the effects of electrical interference on electronics systems arose from military applications. In the early days of electronics systems, pops, bangs and general noise received by radios were taken as being part of "experience" of listening to a radio - even if they were man-made from other local electrical equipment. These any many more examples may EMC a crucial element of any electronics design. Others may utilise digital electronics systems that could be falsely triggered by transient signals. Some of these transmit signals, while many others are sensitive receivers. However today the number of electronics items in everyday has vastly risen. In the early days of electronics comparatively few items of electronics equipment were in use. ![]() ![]() Often when dealing with EMC it is necessary to ask: what is EMC and to have a definition.ĮMC definition: EMC is defined as the ability of devices and systems to operate in their electromagnetic environment without impairing their functions and without faults and vice versa.Įlectromagnetic compatibility, EMC ensures that operation does not influence the electromagnetic environment to the extent that the functions of other devices and systems are adversely affected. Defining what EMC is and understanding the concepts enable electromagnetic compatibility to be achieved from the outset.ĮMC basics EMI interference basics EMC standards CISPR11 CISPR16 CISPR22 FCC 47 part 15 EMC design techniques EMC compliance testĮlectromagnetic compatibility, EMC is the concept of enabling different electronics devices to operate without mutual interference - Electromagnetic Interference, EMI - when they are operated in close proximity to each other.Īll electronics circuits have the possibility of radiating of picking up unwanted electrical interference which can compromise the operation of one or other of the circuits. What is EMC: Electromagnetic Compatibility Basics EMC is of increasing importance as the number of wirelessly connected devices increase. ![]()
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