[sdiy] VCO idea

[Ian Fritz]

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