The circuit systems 710A, 710B may operate according to {HEAD ~ separate source potentials} and {TAIL ~ separate grounds} 
The circuit systems 710A , 710B may operate according to { HEAD ~ separate source potentials } and { TAIL ~ separate grounds }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL