Automatic Gain Control Pre-Amplifier


Posted on Feb 5, 2014

A portion of the op amp`s output signal is rectified by the 1N4148 diodes, then filtered and fed to the gate of the FET input shunting circuit. As the output rises, more and more input shunting takes place. That is, more of the input signal is bypassed, effectively keeping the output level constant. The output output level itself can be set from l


Automatic Gain Control Pre-Amplifier
Click here to download the full size of the above Circuit.

ess than unity all the way up to nearly the gain of the amplifier, making the circuit usable in other applications as well.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Signal Amplifier with 2N2222
    Proximity-switch
    12 volt switching power supply using ltc3810 5
    relative field strength meter
    model RC as USB Joystick
    USB Operated Home Appliances
    Module thermometer temperature meter for digital multimeter using the ic lm35



    Top