Comparator Hysteresis

Dear Team,

This question is regarding comparator with internal hysteresis.

Let a comparator having an internal Hysteresis "X"mv.

  1. Does that mean the minimum achievable hysteresis is "Xmv" ?
  2. Is it possible to obtain a Hysteresis (Let it be "Y"mv) which is less than internal Hysteresis "X"mv using  external feed back resistor network.
  3. Will the external hysteresis set by the user will overwrite the internal Hysteresis or Does the internal and external Hysteresis will get added

Regards

Hari