摘要
针对实时控制系统中,高频信号直接采样时易出现带内混叠的现象,而影响系统的采样结果和动态性能,采用三阶巴特沃斯滤波器和低噪声超宽带宽差分放大器ADL5562设计出用于高频信号直接采样系统中的抗混叠滤波器。经测试,该电路可有效消除信号混叠现象,系统运行稳定、可靠。
Aiming at signal aliasing phenomenon while high-frequency signal sampling in a real-time control system, which would affect the results of sampling and dynamic performance of system, this paper uses third-order Butterworth filter and the low noise, ultra-wide bandwidth differential amplifier ADL5562 to constitute the anti-aliasing filter for direct sampling system of the high-frequency signal. The test results show that the anti-aliasing filter can effectively eliminate signal aliasing, and the system is stable and reliable.
出处
《微型机与应用》
2013年第2期27-29,33,共4页
Microcomputer & Its Applications
关键词
高频信号
直接采样
抗混叠滤波器
high-frequency signal
direct sampling
anti-aliasing filter
