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

    3.6 Volt Lithium Ion Battery Charger (PIC12F675)
    Electronic Police Siren
    Triggering-scr-series
    What is the purpose resistors and capacitor in this 555 circuit
    C64DTV Color Fix
    Sony TV Control
    simple garage stop light circuit
    ACC FC-1 Remote Base Interface circuit
    8-Channel Air Sampler and Biodetection
    Turning gear from idling stop circuit diagram



    Top