binhjuventus
Junior Member level 3
I understand well the aspect mathematic of butterworth filter.
My problem now is, how to calculate the coefficients of the denominator of the transfer function in s-domain of an analog butterworth filter without looking up in the table? Of course, we are given a fomula to calculate the poles of a low pass filter?
In addition, How is the relationship between s-domain anf frequency domain?
Can I replace s = jω to give frequency response? or s=-jω? I can not distinguish between these 2 replacements...
That's because I intend to write a program in Mathematica to list these coeffients.
Looking forward to your helps...
My problem now is, how to calculate the coefficients of the denominator of the transfer function in s-domain of an analog butterworth filter without looking up in the table? Of course, we are given a fomula to calculate the poles of a low pass filter?
In addition, How is the relationship between s-domain anf frequency domain?
Can I replace s = jω to give frequency response? or s=-jω? I can not distinguish between these 2 replacements...
That's because I intend to write a program in Mathematica to list these coeffients.
Looking forward to your helps...