Op-Amp Pre-Amp Mic

Konusu 'Elektronik Devreler' forumundadır ve guclusat tarafından 2 Ocak 2016 başlatılmıştır.

  1. guclusat

    guclusat Tanınmış Üye Süper Moderatör

    14 Haziran 2009
    Ödül Puanları:
    This is the circuit of Op-AmpMicrophone Preamplifier using a single power supply, this circuit suitable for dynamic or electret microphones. Nothing too special here. The Schematic is shown using a dynamic microphone, for use with an electret a pair of suitable biasing resistor is required to power the electret microphone.

    Rangkaian op-amp Pre-amp mic.png

    • use a capacitor with voltage 25volt or more
    • so that the sound produced maximal use supplay good voltage, with output of 18 volts max
    • If the desired strengthening of the different, you can change the value of R1 or R2

    The design is a standard non-inverting design, the input is applied to the non-inverting input of the op-amp, which is pin 3 in most cases. The input impedance is 23.5k, the overall voltage gain is determined by R2 and R1according to the following formula:

    Vo = (R2 / R1) + 1

    With the values of R2 and R1 on the diagram of the voltage gain (for mid band, 1kHz) is approximately 23x or 27.2dB.


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