Questions tagged [gnd-pour]
5 questions
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Two layer FR4 PCB: should you place GND pour on signal layer?
Talking about two layer PCB's FR4 due to lower cost:
I always poured ground on both layers of the PCB, I believed "the more the ground the better", but Recently I started watching altium live presentations, and I came across this video gem to…
Christianidis Vasileios
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Can multiple return paths cause EMI problems?
I am working with a 4-layer board (Signal - GND - PWR - Signal).
The power layer uses routed power so that each chip's power rail can be isolated. Layers 1, 3, and 4 have ground pours and stitching vias. The ground layer is solid, so the routed…
SWM01
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PCB return current path
Return current path follows least resistive path in DC signals; least inductive path in AC signals as you seen in Figure 1.
In Figure 1, there is no GND pour on the top layer, and only a poured GND on the bottom layer.
In Figure 2, there are GND…
yardi
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Isolating RF Ground is it wise?
I am designing a GPS module and I am planning to isolate the RF GND from the DC power supply GND with an inductor.
I have chosen the Murata LQW18CN4N9D0ZD because the low inductance will have low Ldi/dt voltage spikes, it has a high current rating…
humanistscience
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How to make sure Altium routes GND mostly on the bottom layer where there's a polygon pour?
I've tried routing before and after pouring a GND on the bottom layer. I get many GND traces running on the top layer for no apparent reason? Tried without a GND layer, added it after the auto-router - but it did not help.
Any idea what would be the…
user733606
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