In preferred embodiment the control circuit consists of {HEAD ~ a moment defining circuit} for {TAIL ~ defining moment} of power level changing and a level changing circuit for fulfilling power level changing 
for
In preferred embodiment the control circuit consists of { HEAD ~ a moment defining circuit } for { TAIL ~ defining moment } of power level changing and a level changing circuit for fulfilling power level changing
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH