Return Path Basics for Mixed Signal PCB Design @AltiumAcademy
Return Path Basics for Mixed Signal PCB Design  @AltiumAcademy
Uploaded March 2026 | Updated September 2026, 3 weeks ago
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Understanding the return path is the single most important concept before diving into mixed signal PCB design. In this video, Zach Peterson breaks down exactly how displacement current behaves in a ground plane beneath a routed trace — and why so many designers unknowingly implement bad grounding practices as a result. Whether you're new to signal integrity or looking to sharpen your fundamentals, this concise explanation will change how you think about your next layout.

Mixed signal boards fail not because designers don't care about grounding — but because the return path isn't fully understood. Zach walks through an overhead view of a real trace routing scenario, showing how displacement current spreads in a Gaussian distribution below the trace and follows it continuously as the signal travels. If you've ever wondered why split planes or isolated ground regions cause more problems than they solve, this video gives you the foundational answer.

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Return Path Basics for Mixed Signal PCB Design

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