椭圆函数滤波器在通带和阻带都具有等波纹衰减特性,可以预先设计控制波纹起伏的大小(即控制阻带的最小衰减和通带的最大衰减),这样,就能够有效地利用最少的元件去获得陡峭的截止特性和较低的通带扦损,同时也满足阻带衰减的要求。在主要的滤波参数——频率选举性和通带损耗特性——方面,椭圆函数滤波器比最 The elliptic function filter has equal-ripple attenuation characteristics in the passband and the stopband, and can control the size of the undulation (ie, control the minimum attenuation of the stopband and the maximum attenuation of the passband) in advance, so that the least Components to obtain steep cut-off characteristics and lower passband cut-off, but also to meet the stop-band attenuation requirements. In terms of the main filtering parameters - frequency selectivity and passband loss characteristics - the elliptic function filter ratio