Why understanding currents in PCB is important? |

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Күн бұрын

Almost everyone knows, that high speed currents flow under the tracks, but why is it important?
You can watch the full presentation here:
• Ah, that's how it work...
Links to videos used in this presentation:
- How GND VIAs Improve Your PCB Layout • How GND VIAs Improve Y...
- Does Return Current Flow Under Signals? Watch these examples ... • Does Return Current Fl...
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Пікірлер: 26

2 жыл бұрын

Can we say that: High-speed signals travel as electromagnetic waves between signal track and ground. They are not just copper-"connections". With stitched vias, you "guide" the electromagnetic waves through signal track and ground. Without stitched vias, lots of electromagnetic energy are lost as leakage, causing noise to other tracks.

@MatthewHoworko 2 жыл бұрын

Great video Robert! I really like these highlight videos. They compliment your longer videos very well.

@peterritchie7382 2 жыл бұрын

I think it's worth mentioning at least once in the video that for high speed signals the current will flow under the trace because it's picking the path of least impedance not least resistance.

@user-ic4vf2nq3y 2 жыл бұрын

Great video Robert ! Thenk you !

@RicardoPenders 2 жыл бұрын

Thank you so much for sharing this, you make it so easy for me to understand. I didn't know about the high speed currents in this way.

@DavidTLutz 2 жыл бұрын

Thank you Robert for this great expalantion. It is the perfect complement to Phil Salmony's Kicad 6 FEDEVEL course and clarifies much of what was in that course.

@JLCPCB 2 жыл бұрын

Great video Robert! Definitely worth watching! 😀

@maks886 2 жыл бұрын

This is such great value info, thanks!

@didanribeiro7079 2 жыл бұрын

Awesome Robert! Design a PCB always come with a lot of challenges thats why we need to get prepared and I consider you one of my professors on this field. Big hug from Brazil!

@siddharthmali5841 2 жыл бұрын

Excellent.

@EsteemPCB 2 жыл бұрын

We should start using "Return Current" instead of "GND" especially for Digital Designs, How many of you are agree on this?

@Bianchi77 2 жыл бұрын

Nice info, thanks for sharing :)

@thisoldjeepcj5 2 жыл бұрын

Thanks and good job

@billlindsay2593 2 жыл бұрын

I have made many printed circuit boards in my life and many are still in use. I am sure that you have did this one for an example. I would be interested in the circuit that this was taken from. I agree that circuit layouts can create non-traditional flow.

@remy- 2 жыл бұрын

At the end is the link to the big movie! Super Robert! Very interesting.

@nameredacted1242 2 жыл бұрын

I hate these moronic and useless highlights. The whole world has gone stupid.

@friedmule5403 2 жыл бұрын

May I please ask you what type of instruments do you need to analyze a board, how the signals, current and cross talk is behaving on a board you have already built?

@creativeideaseee 2 жыл бұрын

Super explain

@TheLiverX 2 жыл бұрын

Current follows the path of the least resistance, reason being: potential gradient. The potential field can change drastically depending on the frequency (impedance) and the shape. It's just that in schools everyone ignores the fact that the potential, caused by the source, while following the general direction of the wires, likes to extend everywhere. Literally everywhere.

@richardhead8264 2 жыл бұрын

_Thank you Robert!_ _What does the well-behaved GND VIA FENCE example look like on an actual PCB?_ 🤔

@Reingemurkst 2 жыл бұрын

Wires are just two antennas which are connected at the ende

@infamousflav 2 жыл бұрын

What equipment is used to create the images of return currents? They look like thermal imagery. Is there a webpage where it describes how those experiments are done?

@nameredacted1242 2 жыл бұрын

Most likely simulation.

@jakobhalskov 2 жыл бұрын

Expensive pcb simulation software :)

@raylonsmith100 Жыл бұрын

I feel like you spent just as much time repeating that “It’s important to understand return currents” as you did explaining ways to optimize these subtle choices. I didn’t learn how to safeguard during design. Would like some actionable information. Thanks