摘要
为了自动跟踪信号频率变化除去噪声,本文研究了一种能自动跟踪信号频率变化的窄带通滤波器,滤波器由方波发生电路和开关电容滤波器MAX268BCNG相结合来实现,其中心频率可在1Hz和15Hz之间自动跟踪。通过调整部分电路参数,中心频率最高可达150kHz。文中给出了线路及试验结果,可用于对信号的自动处理。
Authors have researched on a kind of narrow-band-pass filter for the purpose of automatically tracking frequency＇s changes and eliminating the noise. The main method is combined the square wave circuit with the switch capacitor filter MAX268BCNG to realize the automatic tracking filtering at the central frequency, which is formlHz to 15Hz. Through adjusting the part of circuit parameters, the highest central frequency can be 150kHz. The result and circuit are given, and it can be used for the signal process.
出处
《电测与仪表》
北大核心
2006年第3期62-64,56,共4页
Electrical Measurement & Instrumentation
