视频放大器自动增益控制分析  

Analysis of Automatic Gain Control for Video Amplifier

作　　者：李宏民[1] 

机构地区：[1]中国空空导弹研究院,河南洛阳471009

出　　处：《航空兵器》2012年第2期49-52,共4页Aero Weaponry

摘　　要：对视频放大器自动增益控制电路的控制方式及其优缺点进行分析,结合实际应用中出现的问题,对自动增益电路进行改进。通过电路仿真及试验,表明改进后的电路既能有效提高视频放大器的输入动态范围,稳定输出,又能抑制噪声对自动增益控制电路的影响。Control method of automatic gain control （AGC） for video amplifier and its advantage and disadvantage are analysed in this paper. Combined with fault discovered in application, AGC circuit is improved. Through circuit simulation and testing, the results show that the improved circuit not only ef- fectively improves the input dynamic range of video amplifier, but also can suppress influence on AGC cir- cuit from the leaking signals.

关 键 词：视频放大器 自动增益控制 动态范围 泄露信号 

分 类 号：TN850.3[电子电信—信息与通信工程]