有限长脉冲响应滤波器的频率采样设计，能够图形显示滤波器的幅频特性曲线-finite impulse response filter frequency sampling design, graphics filter to the amplitude and frequency characteristic curve

双线性变换法无限长单位脉冲响应滤波器的设计，用到的模拟原型是切比雪夫和巴特沃斯低通滤波器。能够显示滤波器的幅频特性和相频特性曲线-bilinear transform infinite impulse response filter units in the design, use of simulation is a prototype and Chebyshev low-pass Butterworth filter. To demonstrate the filter frequency

矩形窗，海明窗，低通，高通，带通都有，而且可以清楚的看到幅频响应等图。

控制系统三阶传递函数时域，幅频，相频响应-control system