自适应信号分解实验装置

The experiment device for adaptive signal decomposition

用开关电容滤波器和锁相环构成的二阶自适应带通滤波器,运用锁相环原理为开关电容滤波器提供时钟信号,使其带通滤波中心频率将跟随输入信号频率变化,克服了传统滤波器带通中心频率不易改变的缺点。实验结果表明,该滤波器较好地实现了自适应带通滤波的功能,可用于教学和科研中周期信号的分解。

The adaptive second-order band-pass filters is constituted with a switch capacitance filter and phase lock loop constitute,using phase lock loop principle to provide the clock signal to the switch capacitance filter,make center frequency of the band-pass filters follow the input signal frequency variation,overcome traditional band-pass filter to change the shortcomings of center frequency.Experimental results show that the device can realize the function with adaptive tracking input signal frequency,and can be applied in the teaching and scientific research of periodic signal decomposition.