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Electronic System Design for EMC

Electronic System Design for EMC

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The basic EMC requirement is to plan, specify, and design devices, equipments, and systems that can be installed in their operational environments without creating or being susceptible to interference. In order to satisfy this requirement, careful consideration must be given to a number of factors that influence EMC. In particular, it is necessary to consider major sources of electromagnetic interference (EMI), modes of coupling, and points or conditions of susceptibility. The electronic equipment or system designer should be familiar with the basic tools (including prediction, analysis, measurement, control, suppression, specifications, and standards) that are used to achieve EMC. The first step in the system-level EMC design process is to define the ambient environment. During this step, it is necessary to identify culprit EMI sources and victim circuits and specify the EMI emissions from sources and the susceptibility of victims. Information about the environment EMI sources and victims may be provided by applicable regulations and standards (i.e., EMC, safety, etc.). The next step in system-level EMC design is to identify major EMI coupling mechanisms and determine EMI suppression and control requirements that are necessary to achieve EMC. Trade-off considerations (i.e., EMI vs. safety, shielding vs. circuit design, etc.) should be addressed, and the applicable EMI fixes should be selected and incorporated. Measurements should be performed throughout the design and development process to verify compliance.

Chapter Contents:

  • 4.1 Basic Elements of EMI Problems
  • 4.1.1 Sources of EMI
  • 4.1.2 EMI Modes of Coupling
  • 4.1.3 Susceptible Equipments
  • 4.2 System-Level EMI Control
  • Suggested Readings: Electronic System Design for EMC

Inspec keywords: electromagnetic interference; interference suppression; electromagnetic coupling; electromagnetic compatibility

Other keywords: system-level EMC design process; electronic system design; EMI suppression; electronic equipment; electromagnetic susceptibility; EMI coupling mechanisms; electromagnetic interference; culprit EMI sources

Subjects: Electromagnetic compatibility and interference

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