A simultaneous A/D converter is also known as a(n) ________ A/D converter. flash

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Question
A simultaneous A/D converter is also known as a(n) ________ A/D converter.
Options
A. flash
B. synchronous
C. comparator
D. asynchronous

Correct Answer

flash

Interfacing to the Analog World problems

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2. The quantization error in an analog-to-digital converter can be reduced by:
Options
A. increasing the number of bits in the counter and DAC.
B. decreasing the number of bits in the counter and increasing the number of bits in the DAC.
C. increasing the number of bits in the counter and decreasing the number of bits in the DAC.
D. decreasing the number of bits in the counter and DAC.

3. The output of a basic 4-bit input digital-to-analog converter would be capable of outputting:
Options
A. 16 different values of voltage or current that are not proportional to the input binary number
B. 16 different values of voltage or current that are proportional to the input binary number
C. 32 different values of voltage or current that are not proportional to the input binary number
D. 32 different values of voltage or current that are proportional to the input binary number

4. What is the major advantage of the R/2R ladder DAC as compared to a binary-weighted-input DAC?
Options
A. It has fewer parts for the same number of inputs.
B. It is much easier to analyze its operation.
C. It uses only two different resistor values.
D. The virtual ground is eliminated and the circuit is therefore easier to understand and troubleshoot.

5. Referring to the given figure, what appears to be wrong, if anything, with the D/A converter and what should be done to correct the problem?
Options
A. There is nothing wrong with the converter.
B. There is an offset error; if no provision is made for adjusting the offset, the op-amp may need to be changed.
C. There is a nonlinearity error; the op-amp must be changed.
D. The power supply voltage appears to be too high; adjust the power supply to the correct value.

9. What is the linearity of a D/A converter?
Options
A. It is the reciprocal of the number of discrete steps in the D/A output.
B. It is the comparison between the actual output of the converter and its expected output.
C. It is the converter's ability to resolve between forward and reverse steps when sequenced over its entire range of inputs.
D. It is the deviation between the ideal straight-line output and the actual output of the converter.

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