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Digital Electronics - Interfacing to the Analog World

Exercise : Interfacing to the Analog World - General Questions
16.
The basic approach to testing D/A converters is to:
apply a sequence of binary codes covering the full range of input values to the circuit input while observing the output on an oscilloscope. The output should consist of a linear stairstep ramp.
single-step the device through its full input range while checking the output with a DMM.
check the output with zero input and then full input. The output of the converter should extend from zero to its maximum value. If so, then everything in between can be assumed to be operating properly.
apply the correct input to the analog terminal and then check to see if the proper binary code exists on the digital inputs.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.

What is the maximum output voltage for the circuit shown below?

–20 volts
–5 volts
–9.375 volts
–2.1775 volts
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
One major difference between a counter-ramp A/D converter and a successive-approximation converter is:
the counter-ramp A/D converter is much faster than the successive-approximation converter
with the successive-approximation converter the final binary result is always slightly less than the equivalent analog input, whereas with the counter-ramp A/D converter it is slightly more
with the successive-approximation converter the final binary result is always slightly more than the equivalent analog input, whereas with the counter-ramp A/D converter it is slightly less
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Which of the following characterizes an analog quantity?
Discrete levels represent changes in a quantity.
Its values follow a logarithmic response curve.
It can be described with a finite number of steps.
It has a continuous set of values over a given range.
Answer: Option
Explanation:
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20.
What is the resolution of a D/A converter?
the comparison between the actual output of the converter and its expected output
the reciprocal of the number of discrete steps in the D/A output
the deviation between the ideal straight-line output and the actual output of the converter
the ability to resolve between forward and reverse steps when sequenced over its entire range
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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