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