Abstract
Automatic Gain Control is widely used to smooth the signal of communication recievers. AGC circuit utilizes feedback to maintain a stable signal-power level within the receiver even though the signal level varies in a big range. But we have to note that the envelope detection part limits pass band and response speed of AGC system. So we proposed an intelligent AGC system using fuzzy logic and concluded that applying Fuzzy Logic Controller to AGC System is a way to enhance AGC circuit. In this paper, we improved the design with commercial variable gain amplifier AD603 and further analyzed pass band of the IAGC circuit.
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