Question

Which of the following is untrue about Sigma-Delta ADC?

a.

fs>2fmax

b.

Zero crossing detector consists of a sample and hold circuit

c.

Aperture jitter is minimized due to integration

d.

The integrating filter is preceded by a zero crossing detector

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Answer: (b).Zero crossing detector consists of a sample and hold circuit Explanation:Sigma-Delta ADC does not require a sample and hold circuit. The zero-crossing detector can be implemented by threshold logic.

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Q. Which of the following is untrue about Sigma-Delta ADC?

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