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INL is not DNL sum problem

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yefj

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Hello, In the ADC I have 2 bit system and Vref=1V with actual voltage shown as shown bellow.
I have transformed the actual into UNIFORM as shown bellow and i produced INL from it.
Bu when i started to calculate the DNL by the definition i see that the DNL's are far from following the rule of
INL(N)=DNL(0)+DNL(1)..+DNL(N-1)
Where did i go wrong?
Thanks.
1602190013992.png
 

Found the problem.
we need to start from 01 not 00. Thanks
 

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