AW: CEM3340 sync results
Martin Czech
martin.czech at intermetall.de
Tue Jan 19 14:13:13 CET 1999
> Just two guesses: Trimming probably not required
> because of a clever circuit where drifting volatges cancel.
> (It's on one chip after all). Glitch probably smoothed with
> limited slew rate (rather than limited band width) stage.
>
> Just guesses - I never tried to investigate further because
> it is no problem in a practical VCO. If there are some
> remnants of a glitch it will hurt much less on a signal
> of high harmonic content (saw) than on a "dark" triangle.
>
I'm sorry, was in a hury in my first mail.
The reason for a closer look to the glitch is not audio,
but waveshaping, a/d converters etc. They could be disturbed by
even an inaudible glitch in the saw, which might cause very audible
artefacts in the waveshaper etc.
But perhaps it is better to use tri waves only for waveshapers,
in order to avoid the saw discharge glitch problems as well.
m.c.
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