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Piezoelectric sensor preamplifier

Question asked by Mircea.Pop on Dec 12, 2013
Latest reply on Jun 12, 2015 by Mircea.Pop

I have a piezo sensor providing me a 1mV voltage signal on a 1Mohm input impedance measurement instrument. I need to build an amplifier which can return an output voltage of about 1V.

Which do you think would be the best solution: a 2 stage voltage amp: a voltage follower and an inverter, capacitively coupled or a transimpedance amplifier.

To me, it seems the voltage amplifier solution is the best. For a 1mHz to 40 Hz bandwidth which op amp would be most appropriate; what do you think about OP07?

 

Thanks in advance!

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