About the delay of hysteresis comparator

[threekingtiger]

P.E. Allen introduced some concept on hysteresis comparators in his book. However, he failed to give the calculation of delay time of this kind of closed-loop comparator. Is there any excellent method for evaluating the propagation delay of hysteresis comparators?
I think the delay calculation is of difference from open-loop comparators. Right?

 

[steve_guo]

Baically, open-loop comp's delay is limited by RC constant.
But, It's a different story for hysteresis comp where positive feedback is generally used.
U can try to find a small signal domain settling time by solving laplace equations.
Unfortunately,comp works in large signal condition most of time.

Steve Guo