op amp lm741 pre amp mic schematic

Posted on Feb 5, 2014

This is the circuit of Op-Amp Microphone 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. The design is a standar

op amp lm741 pre amp mic schematic
Click here to download the full size of the above Circuit.

d 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:

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