§4.9.2巴特沃斯高通滤波器BHPF Example of Butterworh highpass filtering Ringing效应明显减少 a aaaaaaa aaaa aaa a 用团a图团周周 和息数红凯风剑 n=2,Do=30 n=2,D0=80 n=2,D0=160 Ringing效应明显减少 𝑛 = 2,𝐷0 = 30 𝑛 = 2,𝐷0 = 80 𝑛 = 2,𝐷0 = 160 §4.9.2 巴特沃斯高通滤波器BHPF Example of Butterworh highpass filtering