[sdiy] voltage ladder with hysteresis

[mark verbos]

Hi there,

I built a ladder of 16 comparators on a sequencer. The CV goes  
through and inverting stage and thresholds are set with a string of  
resistors from ground to -15 volts, going to the non-inverting input.  
I found the transition points were blurry, and it needed some  
hysteresis. I added 1M resistors from the comparator outputs to the +  
inputs and this works fine on the lower stages, but I find that when  
I sweep the input with a saw wave, now the lower stages go slow and  
it moves faster as it goes to the right. All the way on the highest  
stages wouldn't even switch right until I upped the feedback resistor  
to 2M. Is there some standard way to figure this problem out?  Should  
I just put a 1M on stage 1 and a 2M on stage 16 and divide equally  
between?


hmmm..

Mark