[SI-LIST] Interpolative A/D

Hi All 
   I am not sure if this is the right List to post
this question. But I am hoping to get cluesd to my
doubts!
   An interesting property of Interpolative A/D is its
improved DNL. In case of Flash A/D, DNL can be even 1
LSB if one level of comparator makes wrong decision.
  Lets consider comparators A1, A2, A3. A1  & A2 make
correct decision with o/p '1'. If A3 makes wrong
decision with o/p '1' instead of '0', it leads to 1
LSB DNL.
  In case of interpolative A/D, decision levels are
introduced between each comparator. With same
decisions (From A1, A2 & A3) as above occuring in this
type, how does it reduce DNL?
Infact we will get sparkle codes if
in-between decision makers make correct decision

Thanks in Advance,

Regards,
Partha!


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