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Interfacing to the Analog World

Q1: What is the main disadvantage of the counter-ramp A/D converter?

A It requires a counter.

B The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage.

C It requires a precision clock in order for the conversion to be reliable.

D The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage. It requires a precision clock in order for the conversion to be reliable.

ANS:B - The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage.

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