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The guideline of using 3 bypass capacitors of different values is no longer applicable in this age of SMD capacitors 7
The guideline of using 3 bypass capacitors of different values is no longer applicable in this age of SMD capacitors
I’ve always wondered about that guideline whenever I saw it in Altera/Xilinx appnotes for their high end FPGAs (I refused to follow their advice). Glad to know I wasn’t the only crazy one.
Dangnabit! My grandpappy taught my pappy to use three caps, my pappy taught me to use three caps, and by gum, I’m going to use three caps.
…tradition!…
This has been “no longer applicable” [since the 1990’s](https://www.edn.com/bypassing-pc-boards-thumb-your-nose-at-rules-of-thumb/) at the very least.
Well so it’s still valid if you’re not using SMD then…
I always knew that it was a lot of BS that was no longer applicable, but I still learned a few things from the article. Interesting to read!
Thanks, that was an interesting read.
The only thing that is outmoded is the SPICE model(s) of the old caps. The SMT parts will have their own models. All this guy is saying is to have models of your chosen SMT parts ready for a resimulation of your power distribution system. Nowhere does he say that only one cap is sufficient for any situation.