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