AGC need

I need a Automatic Gain Contorol circuit with Vcont = 0.1 v to 3.5 V and Gain= 10 to 0.1 .

I guess you are asking for tips on how to design one rather that your post being a statement?
Maxim do a lot of off-the-shelf IC's which could help you out - check their website.
If the Vcont is not exactly what you require you can easily scale it with an opamp.

S

I need a complet information about design AGC.

Sounds like a school assignment.

What did you find when you searched on Google?

You did search Google, right?


Torben

Nobody on this forum will design this for you - that is not because people here are stupid, it is because people here are the exact opposite and want to help you to become a good engineer or help solve problems.
If you use Google to search for papers and examples of AGC circuits you will see that there are many resources available to help you.

If you have a specific query about an AGC circuit then thats different ;-)

Don't expect anyone to design this for you - it is a simple task and if you have been asked to do it then you are likely studying engineering and will have already been given the texts to complete it yourself.
If you need one for a 'homer' project - see Google and come back with more specific questions if you get stuck!

Apologies for the rant - please be assured that it is certainly not personal....I just like to rant ;-)

S.

I need a complet information about design AGC.

Click to expand...

I highly recommend the ARRL Handbook, chapter 14. (Page 14.24ff in the 2005 edition).

Of course i searched on internet but couldn't find good paper .However i need your help.

Well I found this on second hit using Google. Try using Automatic gain control as your search parameter as opposed to AGC.
https://www.electro-tech-online.com/custompdfs/2008/07/martin_AGC.pdf

I have before read it.This is not enouhg to desing my project.

The link from the university shows how to design a voltage-controlled-attenuator with a FET. Then it shows it in an AGC circuit.
It is exactly what you want.

audioguru said:

The link from the university shows how to design a voltage-controlled-attenuator with a FET. Then it shows it in an AGC circuit.
It is exactly what you want.

Click to expand...

I couldn't test it by circuitmaker.