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Wednesday, July 31, 2013

AP9256 ELECTROMAGNETIC INTERFERENCE AND COMPATIBILITY IN SYSTEM DESIGN

AP9256 ELECTROMAGNETIC INTERFERENCE AND COMPATIBILITY IN SYSTEM DESIGN

UNIT I EMI/EMC CONCEPTS

EMI-EMC definitions and Units of parameters; Sources and victim of EMI; Conducted
and Radiated EMI Emission and Susceptibility; Transient EMI, ESD; Radiation Hazards.
UNIT II EMI COUPLING PRINCIPLES

Conducted, radiated and transient coupling; Common ground impedance coupling ;
Common mode and ground loop coupling ; Differential mode coupling ; Near field cable
to cable coupling, cross talk ; Field to cable coupling ; Power mains and Power supply
coupling.

UNIT III EMI CONTROL TECHNIQUES

Shielding, Filtering, Grounding, Bonding, Isolation transformer, Transient suppressors,
Cable routing, Signal control.

UNIT IV EMC DESIGN OF PCBS

Component selection and mounting; PCB trace impedance; Routing; Cross talk control;
Power distribution decoupling; Zoning; Grounding; VIAs connection; Terminations.
UNIT V EMI MEASUREMENTS AND STANDARDS

Open area test site; TEM cell; EMI test shielded chamber and shielded ferrite lined
anechoic chamber; Tx /Rx Antennas, Sensors, Injectors / Couplers, and coupling
factors; EMI Rx and spectrum analyzer; Civilian standards-CISPR, FCC, IEC, EN;
Military standards-MIL461E/462.


REFERENCES:

1. V.P.Kodali, “Engineering EMC Principles, Measurements and Technologies”, IEEE
Press, Newyork, 1996.
2. Henry W.Ott.,”Noise Reduction Techniques in Electronic Systems”, A Wiley Inter
Science Publications, John Wiley and Sons, Newyork, 1988.
3. Bemhard Keiser, “Principles of Electromagnetic Compatibility”, 3rd Ed, Artech house,
Norwood, 1986.
4. C.R.Paul,”Introduction to Electromagnetic Compatibility” , John Wiley and Sons, Inc,
1992.
5. Don R.J.White Consultant Incorporate, “Handbook of EMI/EMC” , Vol I-V, 1988.





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