gehan_s
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Hi all,
I am trying to obtain Butterworth, Chebyshev and Bessal LPF responses with the Sallen-Key topology. I found this app-note from TI and it is very helpful. According to the document if I want a 2nd order Bessal LPF, I just use the equations on top of page 9 (first line) along with table 2 (in the same page). It is quite straight forward.
My questions are am I in the correct path and what is the effect of the frequency scaling factor (FSF)?
The FSF is 1 for Butterworth but for Bessel and Chebyshev it has an effect. Why is that?
Regards
[BTW I have asked a similar question a while back but apparently I had no idea about the subject at that time]
I am trying to obtain Butterworth, Chebyshev and Bessal LPF responses with the Sallen-Key topology. I found this app-note from TI and it is very helpful. According to the document if I want a 2nd order Bessal LPF, I just use the equations on top of page 9 (first line) along with table 2 (in the same page). It is quite straight forward.
My questions are am I in the correct path and what is the effect of the frequency scaling factor (FSF)?
The FSF is 1 for Butterworth but for Bessel and Chebyshev it has an effect. Why is that?
Regards
[BTW I have asked a similar question a while back but apparently I had no idea about the subject at that time]