{HEAD ~ The feed forward power amplifier} includes a main path, {TAIL ~ an error path} and a first synthesizer 
includes
{ HEAD ~ The feed forward power amplifier } includes a main path , { TAIL ~ an error path } and a first synthesizer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH