Digital Electronics - Interfacing to the Analog World

Exercise :: Interfacing to the Analog World - Filling the Blanks

1. 

There are many applications in which analog data must be digitized and transferred into a computer's memory. The process by which the computer acquires these digitized analog data is referred to as ________.

A. sampling
B. multiplexing
C. data acquisition
D. prescaling

Answer: Option C

Explanation:

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2. 

When analog inputs from several sources are to be converted, a(n) ________ technique can be used.

A. demultiplexing
B. multiplexing
C. R/2R
D. comparator

Answer: Option B

Explanation:

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3. 

The output of the circuit in the given figure (a) at point X on figure (b) will be ________.

A. 1.011 V
B. 2.75 V
C. –1.011 V
D. –2.75 V

Answer: Option D

Explanation:

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4. 

The stability of the ADC process can be improved by using a(n) ________ to hold the analog voltage constant while the A/D conversion is taking place.

A. sample-and-hold circuit
B. op-amp comparator
C. NPN amp
D. current loop

Answer: Option A

Explanation:

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5. 

The characteristic that a change of one binary step on the input of a DAC should cause exactly one step change on the output is called ________.

A. resolution
B. linearity
C. monotonicity
D. accuracy

Answer: Option C

Explanation:

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