Hello Mahendra,
You may take a look to the LMV1012 or LMV1032, these are specialized amplifiers for small form factor electret microphones.
Best Regards,
-Diego Meléndez López Audio Applications Engineer
Joe,
The LMV1012 is intended to be used with electret microphone capsules. Is this the type of transducer you are using? (Most of the hydrophones I have heard about have been low impedance moving-coil devices.) What is the signal bandwidth required?
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Hi, Nambirajan,
Actually, I think your question is not super specific to the LMV1012. Basically, those caps provide traps for the frequency causing the interference. You should be able to calculate the cap value that will cause a trap for the offending…
Hi Ramin,
Keep the supply to the microphone as clean as possible. The basic FET circuit does not have much PSRR. So pre-filter the supply line - especially if the power is derived from a switching supply.
If you are curious, most likely the microphone…
