采用双线性变换法设计一巴特沃斯高通滤波器，其通带截止频率（-3dB点处） =3KHz，阻带上限截止频率 =2KHz，能带衰减不大于3dB,阻带衰减不小于14dB，采样频率 =10KHz。-Bilinear transform design a Butterworth high-pass filter, the passband cut-off frequency (-3dB point) = 3KHz stopband upper cut-off frequency = 2KHz band a

3nd order high pass filter with cut off frequency at 180Hz.

2nd order high pass filter with cut off frequency at 400 Hz. Designed with cheby2 function in MATLAB. -2nd order high pass filter with cut off frequency at 400 Hz. Designed with cheby2 function in MATLAB.

2nd order high pass filter with cut off frequency at 31 Hz. Designed with cheby2 function in MATLAB. -2nd order high pass filter with cut off frequency at 31 Hz. Designed with cheby2 function in MATLAB.