[sdiy] VCO unstable in Spice, stable in real world

[David G. Dixon]

> Are you running two different oscillators with the same LM319? If so are
> you running into any accidental sync issues, with the behavior of one
> oscillator leaking into the other?

No, I just wanted an inverted version of the comparator output, but I did
not want to use an opamp inverter because I did not want to add any delay to
it.  Hence, I'm running two comparators in parallel from the same inputs,
but connected to the opposite input terminals.  Should work like a dream.