摘要
自动增益控制(AGC)电路在接收机中起着非常重要的作用,它能够实现在输入信号幅度变化较大的情况下使输出信号幅度保持恒定或仅在较小范围内变化。为提高接收机的自动增益控制动态范围、控制速度以及降低外部信号对控制精度的影响等,提出了一种高精度自动增益控制接收机,利用数字AGC电路控制集成电路内部的可变增益放大器(VGA)方式来实现,并进行了硬件加工。测试结果表明提出的接收机可实现高精度的自动增益控制。
Automatic gain control(AGC)circuit plays a very important role in the receiver.It can keep the output signal amplitude constant or only change in a small range when the input signal amplitude changes greatly.In order to improve the AGC dynamic range,control speed and reduce the influence of external signals on control accuracy,this paper presents a high-precision AGC receiver,which is realized by using digital AGC circuit to control the variable gain amplifier(VGA)in Integrated circuit.The test results show that the receiver proposed in this paper can realize high-precision automatic gain control.
作者
朱银霞
张剑
田湘
胡婧
程剑
Zhu Yinxia;Zhang Jian;Tian Xiang;Hu Jing;Cheng Jian(College of Communication Engineering,Army Engineering University of PLA,Nanjing 210007,China)
出处
《电子技术应用》
2022年第10期135-138,共4页
Application of Electronic Technique
