[sdiy] What is a quadrature oscillator good for?

[jhaible at debitel.net]

http://www.till.com/articles/QuadTrapVCO/index.html

Great article, Don!

(And you obviously love to care about details, even down to
the a little graphic like this one:
http://www.till.com/articles/QuadTrapVCO/images/qthr.gif)

One question: You mentioned a jitter near 0Hz if the two halves
of the 3280 don't zero-cross precisely. Can you get this adjusted
so precisely that you don't mess up the tuning- and waveform-purity
when the VCO "just touches" the 0Hz region ?

JH.



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