EMI-EMC Analysis and Noise Reduction on PCB
EMI-EMC Analysis and Noise Reduction on PCB
EMI-EMC Analysis and Noise Reduction on PCB
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<strong>PCB</strong> <str<strong>on</strong>g>EMI</str<strong>on</strong>g> Sources<br />
� Intenti<strong>on</strong>al Sources<br />
� Expected or easily predicted sources for radiati<strong>on</strong><br />
� Emissi<strong>on</strong>s from intenti<strong>on</strong>al signals include loop-mode sources.<br />
� Unintenti<strong>on</strong>al Sources ( more than 90% of <str<strong>on</strong>g>EMI</str<strong>on</strong>g> *)<br />
� Unexpected or “surprise” sources<br />
� Emissi<strong>on</strong>s from unintenti<strong>on</strong>al signals include comm<strong>on</strong>-mode,<br />
crosstalk coupling to I/O traces (<strong>PCB</strong>, PKG, <str<strong>on</strong>g>and</str<strong>on</strong>g> IC levels),<br />
power planes, <str<strong>on</strong>g>and</str<strong>on</strong>g> other board structures.<br />
*Reference from “ <strong>PCB</strong> Design for Real-<br />
World <str<strong>on</strong>g>EMI</str<strong>on</strong>g> C<strong>on</strong>trol ” Bruce Archambeault
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