摘要
针对现有非射频自动增益控制系统难以处理高频信号的问题,提出了一种反相积分峰值检测方法,并基于此方法设计了高频信号自动增益控制系统。反相积分峰值检测法是针对低频MCU设计的高频信号峰值检测方法,可以实现宽频带上的高精度峰值检测。系统由反相积分峰值检测模块对输出信号进行峰值检测,由MCU控制模块根据峰值检测结果调控可变增益放大模块的增益,实现自动增益控制。实验结果表明:该自动增益控制系统最高工作带宽可达200 MHz,相对误差在0.7%以内,相较现有基于非射频峰值检测法的自动增益控制系统,最高工作带宽在控制精度更高的前提下提升到2倍以上。
In order to solve the problem that the existing non-RF automatic gain control system is difficult to handle high-frequency signals,a method of inverse integral peak detection was proposed,and the automatic gain control system for high-frequency signals based on this method was designed.The inverse integral peak detection method was a high-frequency signal peak detection method designed for low-frequency MCU,which achieved high-precision peak detection in a wide frequency band.The system detected the peak value of the output signal by the inverse integral peak detection module,while the MCU control module regulated the gain of the variable gain amplification module according to the peak detection result,so as to realize the automatic gain control.The experimental results show that the maximum working bandwidth of the proposed automatic gain control system can reach 200 MHz,and the relative error is within 0.7%.Compared with the existing automatic gain control systems based on the non-RF peak detection methods,the maximum working bandwidth of the proposed method is increased to more than double with higher control accuracy.
作者
徐超
马瑶瑶
黄玉玲
朱涛
吴迪
XU Chao;MA Yao-yao;HUANG Yu-ling;ZHU Tao;WU Di(School of Optoelectronic Science and Engineering,Soochow University,Suzhou 215006,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2023年第1期65-69,77,共6页
Instrument Technique and Sensor
关键词
自动增益控制
峰值检测
高频信号
automatic gain control
peak detection
high-frequency signal
