a main path configured to amplify {HEAD ~ a power level} of {TAIL ~ an input signal} and generate a path turning signal; and 
of
a main path configured to amplify { HEAD ~ a power level } of { TAIL ~ an input signal } and generate a path turning signal ; and
OTH OTH 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