[sdiy] VCO idea

[charlie lamm]

By flyback I take it you mean when the saw signal goes from its lowest
voltage (relative to ground) to the highest?  Yes, I guess this could be a
source of a lot of headaches.  I will know more when I start to breadboard
this I guess.  Now you guys are getting me really curious about how to
pull this off!

On Mon, 13 Jan 2003, Ian Fritz wrote:

> At 02:59 PM 1/13/2003, Theo wrote:
> >Problem with the LM3914 it that there are TWO leds/outputs active when
> >switching to the next stage. This may or may not be a problem with your
> >application.
> >For building a quantizer I tried adding positive feedback to pull the input
> >voltage out of the "two led" range. For my quantizer this was not a good
> >solution because it only worked ok with a rising input voltage. A falling
> >input voltage still made two outputs to be active at the transition points.
>
>
> The overlap is quite small (~ 1 mV) but might be noticable if you are using
> the output voltages for signals.  But if you are just using the outputs to
> fire S/H circuits, i.e., using separate voltages for the signals, then
> there is no problem. Watch the flyback, though!
>
>    Ian
>