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Amplifier with automatic gain control (AGC)

Discussion in 'General Electronics Discussion' started by mhd93, Apr 27, 2017.

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  1. mhd93

    mhd93

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    Apr 27, 2017
    hello,

    i'd like to design an audio amplifier with an automatic gain control for my project.
    the idea is as long as i vary the input voltage (ex: 10mV) , the output voltage will be constant ( 1.2v or ...) (the waveform on the oscilloscope should be the same).

    i've tried so many design i found on the internet, but no one seem to do the job.

    can you give me suggestion to what i should do?

    this is the last design with the wave form output. any suggestion why it's not working?
    do i need to do my amplification using an ic and a jfet ?


    regards...
     

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