摘要
在某宽带遥测接收机系统设计中,针对系统大动态范围设计要求,提出了一种宽带大动态中频AGC电路实现方案,该方案采用反馈型AGC结构,实现了带宽20 MHz下动态范围达60 dB的AGC系统。重点阐述了系统各模块的设计思路和技术指标,并对系统电路的工作原理进行了详细的分析,最后给出了系统测试结果。实测结果表明,该方案的AGC电路在20 MHz带宽下具有足够大的动态范围,且性能稳定,满足系统设计指标,并已在实际接收机系统中得到应用。
This paper presents a broadband high-dynamic intermediate frequency AGC system,which is used in a broadband telemetry receiver.The system is implemented in feedback AGC structure,making the dynamic range up to 60 dB under a bandwidth of 20 MHz.Design and indicator of each module are described,key problems are also detailedly demonstrated.And at last the result of the testing is showed.The conclusion indicates that the dynamic range of the AGC meets the system targets,and the system is suitable for broadband receiver system.
出处
《电子测量技术》
2010年第11期46-48,73,共4页
Electronic Measurement Technology
