I'm developing a soundmeter and i need to construct a pre amp which helps me putting putting one signal from 14 mv to 1050 mv, i already tried with some ops and with transistors, but i need to keep my noise under 700 micro V and the inner noise of my pre amps at the output is around the 10 mv, can someone recomend me a good desing with good gain levels and really low noise at the output.
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