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hysteresis of latch comparator?

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melodyseu

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comparator latch

Hi everybody
How to realize hysteresis to a latch comparator? Any good methord or any good paper are welcome

Thanks very much!
 

latch comparator

add hysteresis to the pre-amplify stage.
 

latch hysteresis circuit

In general, there are two ways to reach hysterises
the first approach is using a one-stage comparator ,Allen's book give an example.
the second is you can use a one or two stage comparator followed by a smitter.
 

hysteresis in a comparator

Make positive feedback loop .
Positive feedback is needed if your want hysterysis .
 
latching comparator

Thank you very much for your kind suggestions
But is there anyway to add hysteresis to the latch stage, for example the latch in the figure below?
 

hysteresis latch circuit

try to make the width-length ratio of M9 and m10 different.
two tips to form a hysteresis:
the first is positive feedback.
the second is that the circuits for two cases(vp>vn and vp<vn) are different.
 

latch hysteresis

But I think a latch comparator with a good preamplifer stage,then it is not a
hystersis comparator,it is q high speed comparator
 

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