中文说明：
设计一个8阶以内的带通滤波器，通带截止频率fc1=30070HZ，fc2=32170HZ，通带内允许最大衰减0.2dB。设计满足要求的Butterworth滤波器和chebyshev滤波器。以RC运放为基本单元以最易实现的原则完成电路设计及参数选择，并根据设计参数进行幅频特性和相频特性的仿真，给出仿真曲线。分析电路的无源灵敏度。
English Description：
A band-pass filter with 8 orders is designed. The cut-off frequency of passband is FC1 = 30070hz, FC2 = 32170hz, and the maximum allowable attenuation in passband is 0.2db. Butterworth filter and Chebyshev filter are designed to meet the requirements. The RC operational amplifier is used as the basic unit to complete the circuit design and parameter selection according to the principle of the easiest realization. The amplitude frequency characteristics and phase frequency characteristics are simulated according to the design parameters, and the simulation curves are given. The passive sensitivity of the circuit is analyzed.