Overview of EMC Regulations, Testing, and Design Strategies
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Overview of EMC Regulations, Testing, and Design Strategies
Propagation Path Radiation Far-Field Plane Wave Near-Field Capacitive cross-talk Inductive cross-talk Conduction Power distribution Signal distribution Ground loops
• Suppress the emission at its source • Make the coupling path as inefficient as possible • Make the receptor less susceptible to the emission
How EMC
How EMC An example: for PC
Suppress the emission: Proper layout with EM concept
using component with low edge rate as possible
Reduce coupling path using shielded enclosure
less susceptible receptor differential pairs error-correcting code
EMC Regulations CISPR 11 : Limits and methods of measurements of radio disturbance characteristics of industrial, scientific and medical (ISM) radio-frequency equipment CISPR 13 : Limits and methods of measurements of radio disturbance characteristics of broadcast receivers and associated equipment CISPR 14 : Limits and methods of measurements of radio disturbance characteristics of household electrical appliances, portable tools and similar electrical apparatus CISPR 19 : Guidance on the use of the substitution method for measurements of radiation from microwave ovens for frequencies above 1GHz CISPR 22 : Limits and methods of measurements of radio disturbance characteristics of information technology equipment IEC 61000-3-2 : Limits for harmonic current emissions (equipment input current
