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