基于VFA的五阶高通椭圆滤波器设计

Design of Fifth Order High Pass Elliptic Filter Based on VFA

为获得截止特性陡峭程度优良的滤波器,以经典的五阶低通椭圆滤波器为基础设计了一个f_(c)=300 Hz、f_(s)=150 Hz、A_(max)=0.1 dB、A_(min)=40 dB的五阶有源高通椭圆高通滤波器,该电路的优点是输出无加载效应,而且通带增益为1。利用计算机仿真进行验证,通过组装、测试硬件电路,以佐证所设计电路的可靠性。

In order to obtain a filter with excellent cut-off property, an filter is designed based on the classical fifth order low-pass elliptic filterfifth order active high pass elliptical high pass filter with A_(min)=40 dB, f_(c)=300 Hz, f_(s)=150 Hz and A_(max)=0.1 dB. The advantage of this circuit is that the output has no loading effect and the passband gain is 1. The reliability of the designed circuit is verified by computer simulation, and the hardware circuit is assembled and tested.