The main path amplifies a power level of {HEAD ~ an input signal} to generate a path turning {TAIL ~ signal} 
The main path amplifies a power level of { HEAD ~ an input signal } to generate a path turning { TAIL ~ signal }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL