albertson.ch...@gmail.com said: >> Hysteresis does nothing to eliminate jitter or temperature
> Maybe, but it is absolutely needed if there is any noise on the signal. A > perfect comparator with zero hysteresis would dither on every zero crossing. Hysteresis doesn't eliminate the dither from noise. Assume 5 volt CMOS logic with a switching point at 2.5 V. With hysteresis, the low-to high direction switches at (say) 3 V and the high-to-low direction switches at 2 V. If you have noise, whatever happens at 2.5 V without hysteresis happens at 3V with hysteresis. Actually, if you are working with a sine wave, shifting the switching point off center will make the problem worse since the slope will be reduced. Hysterssis will eliminate spikes or double pulses that are caused by noise on a signal with low rise time as long as the noise isn't too big. -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.