Implementing "star" grounding configuration in Eagle

[aprendiz007]

I have a two isolated GND planes in the bottom layer of my Eagle layout (AGND and DGND) and I want to join these to a top layer ground plane with vias.

However, I think I need a third ground for this, but I don't know how to do this in the schematic.

I read that one could join both grounds (AGND and DGND) with a short pad (like the one in the 2nd post of this forum: How to you JOIN two grounds, i.e VSS
... | element14) but I realize that I join both grounds in bottom layer, I'll be creating a GND loop.

How should I go about this? how can I create this 3rd ground in the schematic so that I connect the 2 other grounds to this one with vias?

Thanks in advance for your help!

 

[udok]

I do this solely in the layout editor. In the schematic editor i have only one ground net (GND).

 

[Mark Johnson]

A zero ohm resistor satisfies KiCad's "Electrical Rules Check" and fools it into thinking that the different net-names AGND, DGND, 3GND, 4GND are not accidentally shorted together. You could implement this in the layout with a big fat footprint like SMD_1206, and either use a purchased zero-ohm resistor, or solder down a wide piece of copper braid to connect the pads. Or, if you feel that smaller is better, you could use an SMD_0604. Or, if it pleases you, several of these in parallel.

 

[marce]

Why would you have a ground loop if you connected them together on the bottom layer?
Is this a DAC design and did you look at any of the links I provided in your other thread....

 

[HpW]

I have a two isolated GND planes in the bottom layer of my Eagle layout (AGND and DGND) and I want to join these to a top layer ground plane with vias.

For Eagle, there are 2 news groups: one English and one German.

May you get there an expert support and even a solution for your current version.

my 2 censt

Hp