irreversibleman
New Member
Hi,
I wanna design a circuit which collects sounds, whose frequency is constant in the range between 1-5kHz ,from the enviroment and filter and amplify this sound with audio amplifier.As you know ,the voltage of mic is in the range of micro volts ,hence what should I use to amplify this input considering noise with the coming input wave?A bjt or mosfet or directly an opamp.Is it necessary to power the electret mic.Can you suggest a circuit to make this job(pre-amplifying the mic output)?
I wanna design a circuit which collects sounds, whose frequency is constant in the range between 1-5kHz ,from the enviroment and filter and amplify this sound with audio amplifier.As you know ,the voltage of mic is in the range of micro volts ,hence what should I use to amplify this input considering noise with the coming input wave?A bjt or mosfet or directly an opamp.Is it necessary to power the electret mic.Can you suggest a circuit to make this job(pre-amplifying the mic output)?
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