Talk About Network

Google





Electronic Equipment > Digital Signal Processing (DSP) > Re: IIR notch f...
Latest [ Topics | Posts ] Archive Post A New Topic Post a Reply
<< Topic < Post Post 13 of 19 Topic 13232 of 14426
Post > Topic >>

Re: IIR notch filter

by robert bristow-johnson <rbj@[EMAIL PROTECTED] > Jun 26, 2008 at 08:37 PM

On Jun 26, 11:22 pm, Jerry Avins <j...@[EMAIL PROTECTED]
> wrote:
> Tim Wescott wrote:
>
> > I just make a plain ol' notch.  For a transfer function given a notch
> > frequency and bandwidth, look here:http://www.dsprelated.com/
> > showmessage/81610/1.php.
>
> > A good book on DSP should show you how to calculate your numerical
> > effects.
>
> Tim, you need to figure out how to stop your newsreader from breaking
> URLs.http://www.dsprelated.com/showmessage/81610/1.php.

i always just put it on a separate line.

and, to drive the point more deeply home.  for a 2nd-order notch,
there is no Butterworth vs. Tchebyshev.  it's a mapping from a 1st-
order LPF prototype with the substitution

     s  <---  1/(s^2 + w0^2)

with a 4th-order notch (mapped as above from a 2nd-order LPF) then
there's a difference.  dunno why anyone would want it.

r b-j
 




 19 Posts in Topic:
IIR notch filter
"itsh11" <it  2008-06-26 12:30:23 
Re: IIR notch filter
Oli Charlesworth <catc  2008-06-26 17:05:45 
Re: IIR notch filter
Tim Wescott <tim@[EMAI  2008-06-26 20:28:20 
Re: IIR notch filter
Jerry Avins <jya@[EMAI  2008-06-26 23:22:19 
Re: IIR notch filter
"itsh11" <it  2008-06-27 08:45:56 
Re: IIR notch filter
"itsh11" <it  2008-06-27 09:03:38 
Re: IIR notch filter
Vladimir Vassilevsky <  2008-06-27 09:46:26 
Re: IIR notch filter
"itsh11" <it  2008-06-27 10:01:25 
Re: IIR notch filter
Mikolaj <sterowanie_ko  2008-06-27 17:48:55 
Re: IIR notch filter
Jerry Avins <jya@[EMAI  2008-06-27 12:07:51 
Re: IIR notch filter
Tim Wescott <tim@[EMAI  2008-06-27 08:32:24 
Re: IIR notch filter
"Vladimir Vassilevsk  2008-06-26 20:43:10 
Re: IIR notch filter
robert bristow-johnson &l  2008-06-26 20:37:36 
OT: IIR notch filter
Jerry Avins <jya@[EMAI  2008-06-27 12:01:58 
Re: IIR notch filter
Juha <juha@[EMAIL PROT  2008-06-27 06:29:22 
Re: IIR notch filter
dbell <bellda2005@[EMA  2008-06-27 10:38:52 
Re: IIR notch filter
Vladimir Vassilevsky <  2008-06-27 12:59:17 
Re: OT: IIR notch filter
robert bristow-johnson &l  2008-06-27 21:29:36 
Re: OT: IIR notch filter
Jerry Avins <jya@[EMAI  2008-06-28 08:36:41 

Post A Reply:
  Go here to Signup

AddThis Feed Button


About - Advertising - Contact - Frequently Asked Questions - Privacy Policy - Terms of Use - Signup

Contact
localhost-V2008-12-19 Thu Jan 8 10:41:20 PST 2009.