摘要
采用8阶开关电容滤波器和CPLD所设计的分频电路,设计了一跟踪滤波电路。解决了旋转机械在不同转速下的抗混叠滤波的问题.实现了只跟踪变化的有效信号中心频率的10倍频程.并将其它多余信号滤掉的功能.
A tracking filtering circuit is successfully developed by using
a 8th-order switched-capacitor filter and dividing-frequency circuit
based on CPLD. This circuit solves the problem of anti-aliasing
filtering when the rotational speed of a machine is not constant. At
the same time, tracking decade of effective signals' center frequenci
es and filtering other unnecessary signals are realized.
出处
《仪器仪表用户》
2004年第3期51-52,共2页
Instrumentation
基金
北京化工大学青年基金