Question:
Minimum number of comparators needed to handle a 64 channel A/D converter is
Minimum number of comparators needed to handle a 64 channel A/D converter is
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Flash ADC → Comparators = \(2^n - 1\)
Updated On: Jul 2, 2026
- 63
- 64
- 7
- 6
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The Correct Option is A
Solution and Explanation
Concept:
In a flash (parallel) ADC, comparators are used to compare input voltage with reference levels.
Step 1: Number of levels If there are \(N\) output levels, then number of comparators required is: \[ N - 1 \]
Step 2: Given channels Here, number of channels = 64
Step 3: Apply formula \[ \text{Comparators} = 64 - 1 = 63 \]
Step 4: Interpretation Each comparator corresponds to a threshold level between adjacent quantization levels.
Step 5: Conclusion \[ \boxed{63} \]
Final Answer: \[ \boxed{(A)} \]
Step 1: Number of levels If there are \(N\) output levels, then number of comparators required is: \[ N - 1 \]
Step 2: Given channels Here, number of channels = 64
Step 3: Apply formula \[ \text{Comparators} = 64 - 1 = 63 \]
Step 4: Interpretation Each comparator corresponds to a threshold level between adjacent quantization levels.
Step 5: Conclusion \[ \boxed{63} \]
Final Answer: \[ \boxed{(A)} \]
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