at least one impedance control circuit, each of which is connected to an output end of {HEAD ~ each carrier amplifier} for controlling a load line impedance of said {TAIL ~ each carrier} amplifier 
at least one impedance control circuit , each of which is connected to an output end of { HEAD ~ each carrier amplifier } for controlling a load line impedance of said { TAIL ~ each carrier } amplifier
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH