A further aspect of the present invention is to provide an apparatus and method for automatically adjusting a Gain Bandwidth product of a linear amplifying stage so as to process {HEAD ~ an input envelope signal} having {TAIL ~ a wide bandwidth} 
having
A further aspect of the present invention is to provide an apparatus and method for automatically adjusting a Gain Bandwidth product of a linear amplifying stage so as to process { HEAD ~ an input envelope signal } having { TAIL ~ a wide bandwidth }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL