基于微弱信号检测的有源滤波器设计  

Active Filter Design Based on Weak Signal Detection

作　　者：路春 王思佳 LU Chun;WANG Sijia(The 45th Research Institute of CETC,Beijing 100176,China)

机构地区：[1]中国电子科技集团公司第四十五研究所,北京100176

出　　处：《电子工业专用设备》2023年第6期10-14,32,共6页Equipment for Electronic Products Manufacturing

摘　　要：介绍了一种适合微弱信号检测的带通有源滤波电路,通过合理调整系统传递函数,实现了低噪声微弱信号采集功能。滤波器整体采用二阶高通与四阶低通组成的带通设计,并对多种滤波形式进行对比分析。基于该带通滤波器设计架构实现了滤波器的硬件电路设计,可直接移植到各种传感器检测电路中,为模拟信号后续处理提供了有力实验基础。A band-pass active filter circuit is introduced in this paper,which is suitable for weak signal detection and realizing the weak signal acquisition function with low noise by adjusting the transfer function of the system.The whole filter adopts a band-pass design composed of second-order and fourth-order low-pass modes,and various filter forms are compared and analyzed.The hardware circuit implemented based on this design architecture can be directly transplanted into various sensor detection circuits,providing a strong experimental basis for the subsequent processing of analog signals.

关 键 词：传感器采集 模拟信号处理 有源滤波器设计 带通滤波 传递函数 

分 类 号：TN305[电子电信—物理电子学]