High Performance Automatic Gain Control Circuit for Communication Applications
نویسنده
چکیده
A high performance automatic gain control (AGC) circuit of analog type is presented in this paper. The proposed AGC incorporates a modified sample and hold peak-detector. Circuit operations of this new peak-detector are demonstrated superior to the conventional one, by both keeping and tracking the peak of the input signal at the same time. Furthermore, the design complexity of the proposed AGC is reduced in both the low pass filter and the demodulator due to the modified peak-detector. Based on post-layout simulation results, the complete AGC loop shows very satisfactory circuit operation. Therefore, it is suitable for high performance communication applications such as ASK receiver. Key-Words: Automatic gain control, Sample and hold, Peak detector, Variable gain amplifier, IF amplifier, Loop filter, ASK receiver
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