基于FPGA的大动态范围数字AGC的实现  

Realization of digital AGC with wide dynamic range based on FPGA

作　　者：刘艳[1] 

机构地区：[1]上海航天局802研究所,上海200090

出　　处：《电子设计工程》2009年第8期42-44,共3页Electronic Design Engineering

摘　　要：数字中频接收机中,采用可变增益放大器AD603、数字可控增益放大器AD8320和FPGA实现大动态范围的数字自动增益控制(AGC)。该设计充分利用AD9220的两个指示输入信号范围的输出端口和FPGA编程同时控制可变增益放大器和数字可控增益放大器,即使用同一控制字同时控制两个增益,从而实现增大AGC动态范围,简化电子设备调试,提高接收机工作性能的目的。In digital IF receiver,a digital AGC system with wide dynamic range is realized by a variable gain amplifier AD603, a digital controlled amplifier AD8320 and PFGA.The system design fully uses the output signal port of AD9220 and FPGA programming controlling variable gain amplifier and digital controlled amplifier, which uses one word realizing digital AGC based on the up and under ORT signals of AD9220,it realizes enlarging the AGC dynamic range,simplifying the debug of the digital IF receiver, and improving the working performance of receiver.

关 键 词：FPGA 大动态范围 数字AGC 可变增益放大器 数字可控增益放大器 

分 类 号：TN72[电子电信—电路与系统]