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4. EMC cards
4.1 Phenomena concerned
The sources of the "noise" emitted by the board, whether conducted or radiated, are naturally linked to the activity of the board's electronic components. Symmetrically, the components are the victims of conducted or radiated electromagnetic "disturbances" that reach the board and can cause it to malfunction.
Among the fundamental principles of EMC, there are two that board designers should bear in mind:
electric current always flows back to its source;
the electric current takes the path of lowest impedance, which at low frequencies is always the path of lowest resistance, and at high frequencies is usually the path of lowest inductance. This principle naturally...
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EMC cards
Consideration in map design
Bibliography
Standards and norms
- Products for printed circuit boards – Descriptive manufacturing data and transfer methodology – Part 2-2: Intermediate requirements for the implementation of printed boards – Description of manufacturing data - CEI 61182-2-2 - 2012
- Printed boards and fitted printed boards – Design and use – Part 1-2: Generic requirements – Controlled impedance - CEI 61188-1-2 - 1998
- Integrated circuits – Measurement of...
Regulations
EMC is subject to European legislation through the EMC directive, which is integrated with the CE marking directive that regulates the introduction of products onto the European market. A board designed to be integrated into a product and which is not itself a product placed on the European market is not subject to the CE marking obligation, and therefore not strictly to the requirements of the EMC directive. It must, however,...
Directory
Electronic component manufacturers (non-exhaustive)
Texas Instruments : http://www.ti.com
Linear Technology : http://www.linear.com
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