【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,并将其他多余信号滤掉的功能。更多还原

【Abstract】 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 frequencies and filtering other unnecessary signals are realized .更多还原