Topic: Digital Circuits
The number of comparators needed in a 8-bit flash type A to D converter is
- A. 8
- B. 16
- C. 255
- D. 256
Answer: C. 255
Explanation: The number of comparators in n-bit flash type ADC is $=2^{n}-1$. For $n=8$, number of comparators $=2^{8}-1 = 255$.