loose-electron
Senior Fellow
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Best Design Tool = Capable Designers
Posts: 1638
San Diego California
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coupling paths thru grounds and power supplies are common - these can be split and filtered
differential signal paths between boxes, with strict common mode and differential mode limited BW interconnects.
there's a bit of an art to the process of isolation, but it can be done.
Sometimes one LC section or one ferrite is not going to get it done.
Just sharing a common ground between stages may be enough to mess things up, when the PSRR of the ground pumping in one box does not get filtered out to the next box due to the shared ground.
Just some thoughts.
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