I am tryng to build agc loop with VVC op amp.d and simulate it with TINA T.
But I want to use opamp's to create my own vva with mine specifications can u point me out to any data source that can help me.
So far i did googled but without any successes until now to find relay good design article.
I have shown an old standard circuit approach below. I have never designed a complete circuit using this approach but I made a quick simulation using TINA to show the basic concept. VF1 is the control voltage. I used a current source and capacitor to create a ramping control voltage for demonstration. T1 is operated in triode region to make a variable resistor that varies the gain.
I recommend that you consider using a compete VCA amplifier function from our product line:
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