Design007 Magazine

44 DESIGN007 MAGAZINE I JANUARY 2019 X. Assess Electromagnetic Compliancy (EMC) Control EM radiation at the source. Ensure that differential mode signals do not convert to common mode and eliminate any possible antennae. But, although it looks nice and neat, it may not perform so well. It is recommended that critical trace segments should be spaced by three times the trace thickness, where possible; alternatively, the trace to plane height can be reduced in the stackup if real estate is limited. Figure 4: A walk through the coupling regions. Figure 5: Broadside-coupled crosstalk.

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