[sdiy] step response of second order filter

[Harry Bissell]

oops... right. UNDERdamped

that's what I was thinking anyway...

H^) harry

----- Original Message -----
From: Neil Johnson <neil.johnson97 at ntlworld.com>
To: Harry Bissell <harrybissell at wowway.com>
Cc: synthdiy diy <synth-diy at dropmix.xs4all.nl>
Sent: Tue, 10 Jan 2012 10:43:45 -0500 (EST)
Subject: Re: [sdiy] step response of second order filter

Hi Harry,

> Does the "q" of such a filter make any difference.  ie at a value of .707 I'd expect one overshoot, one undershoot, then settling.
> Higher resonance values extend this.

Simply: Q = 1/d.

So small values of Q mean high damping, large values of Q mean low damping.

> What about if the Q was less than .707 ? would the filter then be underdamped ?

Overdamped.

Cheers,
Neil
-- 
http://www.njohnson.co.uk

-- 
Harry Bissell & Nora Abdullah 4eva