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