TAS5548 Biquad Filter b0 b1 b2 a1 a2 如何计算？

Other Parts Discussed in Thread: TAS5548

以下算法是否可行？

A     = sqrt[ 10^(dBgain/20) ]

omega = 2*pi*frequency/sampleRate

sin   = sin(omega)

cos   = cos(omega)

alpha = sin/(2*Q)

   高通滤波器系数的计算：

             b0 =  (1 + cos)/2

             b1 = -(1 + cos)

             b2 =  (1 + cos)/2

             a0 =    1 + alpha

             a1 =  -2*cos

             a2 =    1 – alpha

低通滤波器系数的计算：

               b0 = (1 - cos)/2

             b1 =    1 - cos

             b2 =  (1 - cos)/2

             a0 =    1 + alpha

             a1 =  -2*cos

             a2=   1 – alpha