热像设备模数混合电路公共阻抗干扰的研究  

Common impedance interference in mixed signal circuit of infrared equipment

作　　者：尹炼[1] 王晓明[1] 陈盈[1] 

机构地区：[1]华北光电技术研究所,北京100015

出　　处：《激光与红外》2013年第4期442-446,共5页Laser & Infrared

摘　　要：随着红外成像技术的发展,大面阵探测器、高集成度处理电路、高帧频红外图像等特点给模拟电路的设计带来了很多困难,其中模数混合电路的干扰问题尤为突出。在建立电路模型的基础上对模拟前级的干扰问题形成原因进行了分析,依据分析结果改进设计模拟前级,经过验证,减小了模拟前级信号受到的干扰。With the development of infrared imaging technology,the characteristics of large infrared FPA,high frame speed of inferred image,large scale integration of circuits introduce some difficulties in the design of analog input stage,especially the interference.This paper analyzes how interference is generated from the point of Abstraction circuit model,and improves the design of analog input stage based on the result of analysis.The interference in new analog input stage has been reduced to a great degree.

关 键 词：干扰 信噪比 公共阻抗 模拟前级 

分 类 号：TN219[电子电信—物理电子学]