[SI-LIST] Current Return Vias
- From: Kenny Frohlich <kenny_frohlich@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sat, 22 Jul 2006 06:45:56 -0700 (PDT)
Dear Experts,
I understand that I need to provide ground vias next to via explictly for the
purpose of letting return currents jump between layers. I know it's a
requirement for high speed signals, especially differrential signals. Is this
also required for low speed single-ended signals (133Mhz or slower)?
If this is a requirement, what would be a good signal via to ground via
ratio? For example, there are five signal vias within a 1 inch area, how many
ground vias do I need?
Thank you
Kenny
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