> so wouldn't it be better to put power/ground on the outer layers and keep sign... | Hacker News

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		aaronmdjones 10 months ago \| parent \| context \| favorite \| on: The magic of DC-DC voltage conversion (2023) > so wouldn't it be better to put power/ground on the outer layers and keep signals in the middle? Signals must never cross a break or split in the plane they're referencing (usually 0V or ""ground""). This creates huge EMI problems. Your proposal would have signals on layer 2 crossing a split in the ground plane on layer 1 (that split caused by power traces). Some interesting material on the subject: https://www.youtube.com/watch?v=ZYUYOXmo9UU https://www.youtube.com/watch?v=QG0Apol-oj0 https://www.youtube.com/watch?v=ySuUZEjARPY https://www.youtube.com/watch?v=0RyBCnowLsI

dragontamer 10 months ago [–]

All of those videos are great.

I'd start with this one specifically: https://www.youtube.com/watch?v=ySuUZEjARPY . (Your 3rd link).

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