The operational amplifiers are {HEAD ~ a pre drive} to {TAIL ~ the pass transistors} to allow smaller sense resistors to be used 
to
The operational amplifiers are { HEAD ~ a pre drive } to { TAIL ~ the pass transistors } to allow smaller sense resistors to be used
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH