# What is essential for a successive approximation Nbit ADC?

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What is essential for a successive approximation Nbit ADC?

(A) 2N clock pulses for conversion, an up-down counter and a DAC. (B) N clock pulses for conversion, a binary counter and a comparator. (C) 2N clock pulses for conversion and a binary counter only. (D) N clock pulses for conversion, an up-down counter and a DAC.

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