common impedance coupling

How to Control Common Impedance Interference on PCBA?

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How to Control Common Impedance Interference on PCBA?

“ In the previous article (Why is Circuit Grounding Design Important on PCBA?), we discussed three factors that lead to common impedance coupling interference: the non-zero impedance characteristics of the common return path; multiple systems sharing a common return path; and the low noise tolerance exhibited by circuits due to their unbalanced characteristics. This article … Read more

Why is Grounding Design Important for Circuits on PCBA?

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Why is Grounding Design Important for Circuits on PCBA?

“Grounding is considered a solution to many EMI issues. However, when grounding is done improperly, the chosen grounding scheme can become part of the problem. This article illustrates the issue of grounding coupling interference through simple examples.” 01 — Common Impedance Coupling According to Ampere’s law (the theoretical cornerstone of EMC grounding concepts – Maxwell’s … Read more