[sdiy] 2164 Korgasmatron VCF

[Thomas Strathmann]

On 9/7/10 13:54 , cheater cheater wrote:
>> Looking at a transfer function as the product of some simple to
>> understand signal processing blocks (like integrator, differentiators, and
>> gain stages) for doing a sketch of the composed amplitude and phase response
>> gives you a more "intuitive" understanding.
>
> That's pretty cool. However I have a problem figuring out what the
> Laplace plane works like. I still don't feel it naturally. Maybe I
> should go and look at the transfer functions for some basic blocks,
> that could help make it easier. I wonder what the best things would be
> to start with.

For analog electronics and filters in particular probably the simple 
combinations of resistors, inductors, and capacitors in their first and 
second order passive filter configurations. This is also what's 
sometimes used as introductory example in systems theory when some EE 
background can be assumed.

> Control theory is a whole discipline :) What specifically do you recommend?

Something like control theory 101 for engineers or how one would call 
that. The systems theory aspect of a first year course: linear SISO 
systems, Laplace transform, integrators, differentiators, gain blocks, 
and their combinations, sketching a Bode plot given a transfer function 
in the s-plane (something like this: 
http://www.ijee.dit.ie/OnlinePapers/Interactive/Cheevers/EACWebPaper/index.html), 
perhaps root locus diagrams (poles plotted vs. gain -- let's you quickly 
see when and how a system becomes unstable). I'm probably forgetting 
some things that could also be of interest to you, but you will probably 
find them for yourself one you start digging through the suggested 
topics. Hope it helps a little.

	Thomas