VCO update

[Ian Fritz]

Jim --

Thanks for the reminder about the CEM3340. I went back and looked at their
literature and discovered that they used the same synchronization technique
(their "hard sync"). They even show the folded waveshapes I tried to
describe. As for saw converters, I think all techniques use some kind of
switched inverter. The other ones I tried produced bigger glitches at the
switching point, though.

  Ian

----- Original Message -----
>
>     I did something similar a long time ago.  I used a BJT for the switch,
and
> there was only one, but same idea, reversed the gain of an op-amp stage.
Even
> the BJT version worked pretty good.  Except I needed a pot to make sure
the two
> segments lined up.  Never had a triangle oscialtor since, so I never had
any
> need to re-visit that methode.  The CEM3340 does basically the same thing
as
> well.
>