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Amplifier with automatic gain control (AGC)

mhd93

Apr 27, 2017
1
Joined
Apr 27, 2017
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1
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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