低通滤波器的优化设计

The Optimization Design of the Low Pass Filters

低通滤波在检测仪表中,得到了广泛的应用。本文介绍的滤波器是采用了RC有源网络,即用带反馈的双"T"网络和带反馈的伯特华斯网络,以运算放大器为核心串联组合而成。文中较系统地介绍了该滤波器的电路设计、参数优选和实验结果等。

The low pass filters are widely used in the detecting instruments. The filter introduced here adopts RC active network, i.e. dual-Tnetwork and Butterworth network with feed-back and combined in series with the operat-ional amplifier as the kennel. The circuit design, parameter optimization and experimental results of the filter are introduced systematic-ally.