Good, simple filter ccts- outcome

[Matthew S. Padden]

Hi..

	Many thanks to all who responded to my 'simple circuit' request. The 
switched resistor idea is too complex, I think, for the lab I'm teaching, 
interesting though the circuit is. It might be good for later on in the 
course, when RF techniques are covered.

	So, I'll either go the 3-opamp biquad route (H&H, p278) and maybe add OTAs 
to get voltage control of cutoff frequency, or I'll do the Polyfusion LPF, 
if I can get the IC count low enough (ie lots of quad packages!). The good 
thing is if I give them a simple idea which is immediately useful, they can 
then go away and see how many ways it can be improved and tweaked. More 
budding DIYers! :) I might even learn something myself...;)

Bye for now
--
Matthew S. Padden
Computer Music Research Group
Room M5/14
Music Dept.
Huddersfield University
Queensgate
Huddersfield
England HD1 3DH
p: +44 1484 422288 x2402
f: +44 1484 472656
e: mattp at mindless.com
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"The masses are asses and need Tonto's glasses!" (Mark Mothersbaugh)
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