Electret mic pre amp

Posted on Feb 7, 2014

Electret mic pre amp schematic. The op amp provides an amplification of about 30 dB (which is sufficient for the relatively high output level of an electret microphone), this gain depends on the value of resistors R3 and R4. If you want to be able to vary the gain, simply replace the resistor R4 to 120K a 470K potentiometer in series with a resist

Electret mic pre amp
Click here to download the full size of the above Circuit.

ance of 10K. The overall gain in this way can vary from 10 to 45 dB.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Audio Power Limiter
    Tx/Rx Control
    Led indicates logic states
    Audio Clipping Detector Circuit
    Principle Power Amplifier Design
    Stepper Motor Driver
    Simple Audio amplifier Using Transistors
    Scoring Game Circuit
    building synchronous clock
    The K9AY receiving loop antenna
    Audio Memo Alert Circuit
    Wien Bridge Oscillator