Interfacing to the Analog World - Practice Questions

Question 1

In a binary-weighted D/A converter the sum of all the currents from the binary weighted resistors flows through the operational amplifier.

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Question 2

An actuator is usually a device that:

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Question 3

What is the purpose of a sample-and-hold circuit?

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Question 4

What is the major advantage of the R/2R ladder DAC as compared to a binary-weighted-input DAC?

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Question 5

The process by which a computer acquires digitized analog data is referred to as ________.

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Question 6

When the analog input to a tracking A/D converter is at a constant level, the digital output will oscillate.

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Question 7

A test system using the GPIB is being used to monitor a potentially dangerous crash test from a distance of 200 feet. The engineer decides to have you fabricate a special cable, rather than order one, since all the materials are on hand and the tests are already behind schedule. When the tests are run, the test system is erratic and the data is almost useless. What has gone wrong?

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Question 8

Flash A/D converters depend on an input clock pulse to perform each conversion.

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Question 9

One way to determine the resolution of a DAC is to calculate the ratio of one step voltage to the maximum output voltage.

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Question 10

Which of the following describes the basic operation of a single-slope A/D converter.

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