reduce noise by replacing large decoupling capacitor footprints with smaller ones

[Ruskuls]

Version Number

Current REV05 mobo

Bugfix or Enhancement

Enhancement

Description

Most of the decoupling capacitors used in this PCB are way too large and placed away from IC's.
It can result in increased noise in power rails that can affect control signal lines.

Suggested Solution

Replace 0805 decoupling capacitors with smaller ones, for instance, 0402 (preferred) / 0603. smaller case => smaller parasitic inductance aka ESL.
Pay attention to capacitor routing it should have the least possible amount of loop inductance.

Informative links:

• https://www.signalintegrityjournal.com/articles/1589-the-myth-of-three-capacitor-values
• https://www.youtube.com/watch?v=ARwBwHZESOY