ladder filter operation

[cyborg0 at GlobalEyes.net]

Christopher MacDonald wrote:

> BTW does anyone else out there spend hours listening to the same
> sawtooth wave while turning knobs, swapping components, and staring at
> an oscilloscope or have I just completely lost my mind?   :)
> 
yep. I do all the time ever since I got my scope..I also have gained
about 10lbs and am now horribly out of shape for someone who used to run
amateur triathalons a few years ago
.
I have also realized many wonderful and fantastic mods by taking a pot
and jumpering across certain key areas and looking at the output.. Some
of them being everything from pulse width modulation to increased env.
modulation to Filter modulation to beyond..

Also, I unfortunately do not do well with textual descriptions of whats
going on in a ladder filter..From what I gather, it seems to me like a
giant voltage slope dependent capacitance where you artificially set the
point at which the capacitance starts at by messing with the voltage
bias of the ladder, thereby nullifying the effects of some of the
capacitors therefore opening the filter..but im prolly way off base..
I have trouble understanding how the voltage bias and current bias work
together..I know that a constant current source nullifies the
exponential voltage change in a capacitive circuit.. but beyond that..


rob