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