摘要
为实现自动跟踪信号频率变化并除去噪声及不需要的频率信号输出,根据工程项目的实际需要设计了一种能自动跟踪信号频率变化的极窄带通的滤波器,滤波器主要由开关电容滤波器MAX260BCNG和锁相芯片CD4046结合实现,其中心频率在1 Hz^7.5 MHz之间调控方便。经实际应用,该滤波器性能可靠,可以满足工程项目的性能指标。
For the purpose of eliminating the noise and tracking frequencyrs change automatically, the paper researches a kind of narrow - band - pass filter according to the demand of project. The filter is combined the switch capacitor filter MAX260CENG with the micropower phase - locked loop CD4046BC. The performance is reliable and its central frequency can be adjusted conveniently. In the paper,the circuit and result are given,and also can be used in the signal process.
出处
《现代电子技术》
2008年第5期76-78,共3页
Modern Electronics Technique
基金
上海某航天科技院所
属军工项目
