Re: Opamp preamplifier design question



MRW wrote:

I'm working with these microphones because I have them already:
http://www.knowlesacoustics.com/knowlesacoustics-apps/microphone_productdetail.do?product_id=12

Assuming that the voltage output of the mic at 40dB re 20 uPa is 5
microvolts, would using two opamp stages for a pre-amplifier circuit
be suitable?

I think 5 microvolts is too low, so I'm trying to step up the voltage
to at least 50 mV. That would mean that I would need a gain of 10,000.

You've made some mistake somewhere about the mic output level methinks.

Graham

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