[sdiy] Transistor Ladder question.

[Ian Smith]

Ah, yeah, I got the whole stack of Electronotes a year ago and still haven't gotten through it all yet. I'm definately going to look for the polygon filter. Thanks for the point in a direction.

-Ian
 
----------------------------------------
> From: lanterma at ece.gatech.edu
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Transistor Ladder question.
> Date: Sat, 30 Aug 2008 02:14:27 -0400
> 
> 
> On Aug 29, 2008, at 10:22 PM, Ian Smith wrote:
> 
>> What happens if you add more "rungs" (transistor pair and associated  
>> components) to the standard Moog ladder?
> 
> You get more "poles," which here essentially means the cutoff becomes  
> steeper. You'll also get different behavior as you add resonance.
> 
> There's a nice analysis of the general case somewhere in Electronotes,  
> under the name of "polygon filters" or "polygonal filters" or  
> something like that. The complete Electronotes collection is well  
> worth the $300 or whatever Bernie is charging for it now. That stack  
> is a goldmine.
> 
> - Aaron
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