Driven Ground not connected?
Based on the open source schematics for the ganglion board, it looks like driven ground is not being used in any functional way for EEG/EMG acquisition (it's connected to input protection, and there's a voltage follower but it's not connected to anything else). What's going on here?
Comments
So in short, ground exists and is used in all EEG. Ganglion may not have driven ground, if it was tested and found to not improve the CMRR.
Does that make sense?
https://en.wikipedia.org/wiki/Driven_right_leg_circuit