yefj
Advanced Member level 4
Hello, I understand that DNL is measured as the standart deviation of subtraction of two voltages where each one is normal distributed.
for example:
if our step is from 6I to 7I then then its I4+I2 to I4+I2+I1 to 111 in binary weighted where as in thermometer it 6I1 to 7I1.
DNL of binary: stadrt diviation of subtraction of random number is sqrt of their power 2 sum)
sqrt(4+2 +0+4+2+1)= sqrt(13)
in thermometer our current distributions are corelated so we subrtaract and getting DNL of 1.
But the formula shown bellow is much more comlicated.how come we just subtract?
Thanks.
for example:
if our step is from 6I to 7I then then its I4+I2 to I4+I2+I1 to 111 in binary weighted where as in thermometer it 6I1 to 7I1.
DNL of binary: stadrt diviation of subtraction of random number is sqrt of their power 2 sum)
sqrt(4+2 +0+4+2+1)= sqrt(13)
in thermometer our current distributions are corelated so we subrtaract and getting DNL of 1.
But the formula shown bellow is much more comlicated.how come we just subtract?
Thanks.