Analog to Digital and Digital to Analog Converters – Exercise – 1

1. The characteristics of a DAC, which are generally specified by the manufacturers :

(a) Linearity
(b) Resolution
(c) Accuracy
(d) All of the above

Answer
Answer : (d)
Explanation
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2. The number of resistors required for an N-bit DAC is 2N in the case of ……. ?

(a) Weighted resistor type DAC
(b) Binary weighted DAC
(c) Segmented DAC
(d) R-2R ladder DAC

Answer
Answer : (d)
Explanation
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3. The maximum conversion time for a SAR DAC is :

(a) 4n clock cycles.
(b) n clock cycles.
(c) 8n clock cycles.
(d) n/2 clock cycles.

Answer
Answer : (b)
Explanation
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4. The digit position current in the R/2R ladder DAC is :

(a) one half the current in the bit position to the left.
(b) one eighth the current in the bit position to the left.
(c) one fourth the current in the bit position to the left.
(d) equal to the current in the bit position to the left.

Answer
Answer : (a)
Explanation
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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
Answer : (b)
Explanation
No answer description available for this question. Let us discuss.
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