Hi all, I would like to design a precise comparator with precise hysteresis.
But I know the hystersis of a schmit trigger variates with supply voltage
variation. So what's the idea if I need a comparator used to compare a precise
VIH and VIL with hystersis function. The voltage difference between VIH and VIL
is 150mV.
Prof. Allen introduces two different types of comparator, internal and external
positive feedback. But both will variate with process or supply variation.