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