aaron_do
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Actually i've never designed AGC before and I was just having some doubts. I'm not worried about steady-state error for the moment...I intend to implement two AGC loops. A coarse one and a fine one. Right now i'm looking at the coarse one.
What i want to do is have a peak detector and filter, then have a comparator bank to get about 6-8 control signals. They can select the gain level. So you end up with 9 gain levels (one is always set). So i'm worried that if i have say 10 dB gain differences, the output amplitude will osciallate by about 10 dB. I've read some papers but none of them seem to talk about that.
ACWWong, i'm starting to understand what you mean now by hysteresis. The idea had occured to me but i thought it would be too complex (i'm going for low power) to implement. Is there a simple way to do this?
thanks, Aaron
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