| 基于晶体管的自动增益控制技术研究 |
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| 引用本文： | 李建强,高丽丽.基于晶体管的自动增益控制技术研究[J].无线电工程,2011,41(9):55-57. |
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| 作者姓名： | 李建强 高丽丽 |
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| 作者单位： | 1. 中国电子科技集团公司第五十四研究所,河北石家庄,050081
2. 河北远东通信系统工程有限公司,河北石家庄,050081 |
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| 摘 要： | 针对传统的自动增益控制方式电路复杂、成本偏高的情况,设计了基于晶体管的自动增益控制方案,包括双晶体管控制方式和单晶体管控制方式,对其工作原理进行了分析。在电路设计环节,推导了基于级联AD603的大动态可变增益放大器(VGA)模型,设计了具体的反馈控制电路。给出了实际电路的测试数据,并对测试结果进行了分析。对这2种控制方式进行了比较,并对特点进行了说明。
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| 关 键 词： | AGC 晶体管 反馈 AD603 |
Research on Automatic Gain Control Based on Transistor |
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| LI Jian-qiang,GAO Li-li.Research on Automatic Gain Control Based on Transistor[J].Radio Engineering of China,2011,41(9):55-57. |
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| Authors: | LI Jian-qiang GAO Li-li |
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| Institution: | LI Jian-qiang1,GAO Li-li2(1.The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China,2.Hebei Yuandong Communication System Engineering Co.,Ltd,China) |
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| Abstract: | Against to the intricacy and high cost of traditional AGC circuit,new AGC schemes based on transistor are designed,including dual transistors control scheme and single transistor control scheme.Their working principles are analyzed.The high dynamic VGA model based on cascaded AD603 is deduced.The AGC circuits are designed based upon these feedback control schemes and the VGA model.The Test results of physical AGC circuits are given.By analyzing results,the characters of the above two schemes are compared. |
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| Keywords: | AGC transistor feedback AD603 |
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