Re: electronics circuit design
Sensitivity of 30db is meaningless, it needs a reference level.
A Gain of 30db would be a meaningful request, but it is short of a lot of information, noise performance requirements, does it need phantom, what LF corner frequency, distortion performance requirements, what power rails are available, is it power constrained, balanced or unbalanced input and output?
THAT corp have some nice single chip solutions that are really very good, as do TI and analog, pick a chip and follow the app note would be my approach unless I needed something unusual.
Regards, Dan.