[sdiy] Analysis of Buchla 259 principal oscillator...

[mark verbos]

Aaron Lanterman wrote:

> P.S. I thought the 20.7K might be 26.7 or something, as it's very smudgy 
> - but if you use that, you get, vtri = -2.8 for v- = 0, vtri = 3.1313 
> for v- = 5, and vtri = 2.2285 for v- = 4.29, again not really centered)
> 
are you looking at R154? because that is 28.7k. That should pull the 
signal down.

Incidentally, I don't think the resistors at the integrator really 
determine where the TRI wave is centered, the thresholds of the 
comparator do that. If you were to build the integrator all alone, then 
you may at some point feed it no input, THEN the + input would determine 
where it settles. I don't see how that matters in this case. Am I wrong?

Mark