The feedback circuit responds to the sensing circuit to generate a first input signal that is indicative of {HEAD ~ the desired level} of {TAIL ~ current} through the load 
of
The feedback circuit responds to the sensing circuit to generate a first input signal that is indicative of { HEAD ~ the desired level } of { TAIL ~ current } through the load
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH