"TRABEM" bravely wrote to "All" (12 Sep 05 12:18:52)
--- on the heady topic of " Butterworth bandpass filter question"


I thought it was a turkey until I opened a filter cookbook...
Isn't it flat smooth response without overshoot as opposed to
Tchebychev with a little overshoot but faster risetime?
Bessel is something in between these?
Where do they find these names!!!

M*i*k*e


TR From: TRABEM
TR Subject: Butterworth bandpass filter question
TR Xref: core-easynews sci.electronics.components:101732
TR sci.electronics.design:505281 sci.electronics.repair:341949


TR A butterworth is a butterworth............in any discussion of the
TR butterworth filter, you will see this schematic.

TR Asking how I know it's a butterworth is a little like asking how I
TR know a car is a car.

TR However, I don't know it all.........perhaps it's closely related to a
TR butterworth, but called something else???

TR Let me know if I've made an error please.

TR T


TR On Mon, 12 Sep 2005 06:07:31 +0000 (UTC), "Reg Edwards"
TR wrote:

I am trying to scale an existing front end receiver (butterworth
bandpass) filter to a different frequency range.

=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d= 3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d=3d =3d=3d=3d=3d

How do you know it is a Butterworth as distinct from other types?

.... If all else fails, hurl it across the room a few times!