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