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