模拟滤波器的设计包含了巴特沃斯滤波器，切比雪夫滤波器，椭圆滤波器，以及10阶贝塞尔滤波器的平方幅频率和相频响应曲线，贝塞尔滤波器的特点是：在0拼时具有最平坦的群延迟，并在整个通带群延迟几乎不变-Analog filter design consists of Butterworth filters, Chebyshev filters, elliptic filters, as well as 10 pieces of first-order Bessel filter is the squar

切比雪夫滤波器的设计与实现,设计的滤波器可满足通带内平坦的群延迟响应和通带外足够大的的衰减-Design and Implementation of Schiff cut filter, the filter designed to meet the passband than flat group delay response and pass-band attenuation is large enough

四种模拟低通滤波器，并画出幅度和相位，群时延图像-Four analog low-pass filters, and draw amplitude and phase, group delay images

相时延对信号波形影响的讨论,群时延对调幅波包络线影响的讨论-Discussing the phase delay of the signal waveform effects, group delay of the amplitude modulation envelope affected