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Design of a Large Dynamic Range and Broad Band Digital IF AGC System
Author(s): 
Pages: 613-616
Year: Issue:  5
Journal: TRANSACTIONS OF BEIJING INSTITUTE OF TECHNOLOGY

Keyword:  数字自动增益控制数字中频接收机数字可变增益放大器;
Abstract: 根据数字中频接收机对自动增益控制(AGC)电路的增益调节范围、调节步长及精度、工作频率范围和响应速度等要求,分析了AGC系统中3种典型可变增益放大器存在的不足,并利用新推出的数字可变增益放大器(DVGA)芯片AD8369设计了数字AGC系统,并给出了基于FPGA的数字AGC控制电路的算法.该系统使复杂的AGC控制要求在数字部分可以容易地得到实现,且其具有快速收敛和精确的稳态响应等优点.
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