Ripple in the passband I s what Im going withRipple in the passband
Ripple in the stopband
Steeper rolloff than Butterworth
Sorry - not 100% correct.Ripple in the passband
Ripple in the stopband
Steeper rolloff than Butterworth
That is for a Chebyshev Type ISorry - not 100% correct.
No ripple in the stop band;
Steeper roll-off near the pass band edge only - in general, the roll-off is determined by the order only.
In addition, pass band edge defined (mostly) NOT by -3 dB but by the ripple.
Yes - if somebody asks for Chebyshev response (without any additional information) I always assume Chebyshev I - and not the inverse Chebyshev function.That is for a Chebyshev Type I
Sorry - not correct. As mentioned before, the roll-off is determined by the filter order only (starting approx. one cade above the pass band edge).The rolloff for a Chebyshev type I is steeper than for a Butterworth of the same order.
You have to trust them if you're too cheap to buy a book.Yes - if somebody asks for Chebyshev response (without any additional information) I always assume Chebyshev I - and not the inverse Chebyshev function.
Sorry - not correct. As mentioned before, the roll-off is determined by the filter order only (starting approx. one cade above the pass band edge).
Butterworth and Chebyshev (2nd order): 40 dB/dec.
Hint: Do not blindly trust wikipedia.
And what about using your own brain?You have to trust them if you're too cheap to buy a book.
You could also build one and measure it, but even that has become too difficult for most.
Are you saying that the denominator of the transfer function for a Butterworth filter is the same (identical) as the transfer function for a Chebychev filter of the same order?And what about using your own brain?
A short look on the transfer function reveals that the denominator is the same for both functions - thus, the roll-off is the same, of course.
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