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1. EC8072
ELECTROMAGNETIC INTERFERENCE
AND COMPATIBILITY
PREPARED BY
R.PONNI ,AP/ECE

2. COMMON GROUND IMPEDANCE COUPLING
• Common impedance coupling occurs when
currents from two different circuits flow through a
common impedance.

3. COMMON GROUND IMPEDANCE COUPLING

4. COMMON MODE AND GROUND LOOP COUPLING
• The cable also carries currents in common mode ,
that is all flowing in the same direction on each
wire.
• These currents very often have nothing at all to do
with the signal currents.