Splitting Ground
September 17, 2007
Here’s a quick electronics question:
How can I couple two groundplanes together, but isolate noise between them?
The reason I ask is because I’ve got a really noisy USB connection coming from my work laptop, and while I can feed it’s data lines right into the DAC, the ground connection for it is the same as the one for the outputs. I’m trying to figure out how one can couple those two grounds together, but cut off noise between them.
Best I can tell that’s just done with a ferrite bead… Is that right?
I thought grounds could only be coupled OR isolated, not both.
It’s Schrödinger’s Ground! :D
I’m trying to isolate the noise, but they need to be connected togeter. :\ I think I may have another solution, though…
What are you measuring the ground against?