Compartor with precise VIH and VIL

[GDF]

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.

Any suggestion?
Thanks,

 

[sunking]

cmos analog circuit design
allen
P467-471

 

[GDF]

Prof. Allen introduces two different types of comparator, internal and external
positive feedback. But both will variate with process or supply variation.

 

[sunking]

use a adc

 

[Btrend]

refer to this
**broken link removed**