OP27 Fixed Gain Transformerless Microphone Preamplifier


Posted on Feb 5, 2014

A simple but effective fixed gain transformerless microphonepreamplifier circuit diagramin the picure below. The circuit amplifies differential signals from low impedance microphones by 50 dB and has an input impedance of 2 kOhms. The OP27/37 operational amplifierhelps to preserve bandwith because of the high working gain of the circui


OP27 Fixed Gain Transformerless Microphone Preamplifier
Click here to download the full size of the above Circuit.

t. If you need the microphone is to be unplugged, a dummy resistor Rp may be necessary (source: analog. com)




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Tone-control audio amplifier
    Tv modulator
    Pulse Width Modulators using LM339
    Getting started with AVR development
    Line Follower Robot
    cdmp3 cd with cdroom circuit diagram
    Motional feed back amplifier
    Moving Charge Sensor of J. Ahern
    Infrared detector circuit using PID20
    oscillator and frequency divider schematics
    ISL83490 3.3V Full Duplex 10Mbps RS-485/RS-422 Transceiver
    Build Your Own Motorcycle Alarm
    Adjustable output voltage power supply circuit MAX610
    Normally closed contact burglar alarm circuit diagram



    Top