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Analog and Digital Converters

Q1: The primary disadvantage of the flash analog-to digital converter (ADC) is that:

A it requires the input voltage to be applied to the inputs simultaneously

B a long conversion time is required

C a large number of output lines is required to simultaneously decode the input voltage

D a large number of comparators is required to represent a reasonable sized binary number

ANS:D - a large number of comparators is required to represent a reasonable sized binary number

The number of a comparator used in flash type ADC is 2^n-1.



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