Analog to Digital and Digital to Analog Converters 5

5. Filtering is important to DAC operation :

(a) because it adds noise to the output signal.
(b) because it returns the DAC output to a smooth continuous signal.
(c)  because it selects one frequency to pass on from the output.
(d) because it acts as a very high-frequency high-pass filter.

Answer : (b)

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