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