Question 1

A multiplexer is used for _________

Accepted Answer

A multiplexer is a device that accepts multiple inputs and selects one of them to be sent to the output.

Question 2

The time required to complete the conversion of Analog to Digital is ________ the duration of the hold mode of S/H.

Accepted Answer

The time required to complete the conversion of Analog to Digital is typically less than the duration of the hold mode of Sample and Hold (S/H) to ensure that the analog signal is accurately captured and converted without changes during the conversion process.

Question 3

In A/D converter, what is the time relation between sampling period T and the duration of the sample mode and the hold mode?

Accepted Answer

The sampling period T in an A/D converter should be larger than the duration of the sample mode and the hold mode to ensure that there is enough time to accurately capture and convert the analog signal to a digital signal without overlap or interference between successive samples.

Question 4

During which period the op-amps output of sample and hold circuits is processed?

Accepted Answer

During the hold period, the output of the op-amp in sample and hold circuits is processed. This is because the circuit maintains the last sampled value, allowing for processing or conversion to occur without changes to the signal.

Question 5

Sample and hold circuit are used in

Accepted Answer

Sample and hold circuits are used in all the mentioned applications to maintain a stable voltage level for processing.

Question 6

The opamp in the Inverting circuit is in __________

Accepted Answer

In an inverting amplifier configuration, the operational amplifier (opamp) operates in the linear region to provide a stable, linear amplification of the input signal. This is essential for the opamp to accurately amplify the input signal without distortion.

Question 7

In an Inverting Amplifier circuit, the output voltage vo is expressed as a function of ____________

Accepted Answer

In an Inverting Amplifier circuit, the output voltage (vo) is primarily a function of the source voltage (input voltage), as the amplifier inversely amplifies the input signal voltage.

Question 8

In the non-inverting configuration of operational amplifier

Accepted Answer

In a non-inverting amplifier configuration, the positive terminal (non-inverting input) is connected to the input signal, which can be a power source or signal source, while the negative terminal (inverting input) is connected to the output through a feedback network.

Question 9

For ideal non-inverting operational amplifier

Accepted Answer

In an ideal non-inverting operational amplifier, the input resistance is considered infinite to ensure no current flows into the input terminals, and the output resistance is considered zero to allow the amplifier to drive loads without affecting the output voltage.

Question 10

Which is the best example of a single channel data acquisition system?

Accepted Answer

DPM (Digital Panel Meter) is the best example of a single channel data acquisition system because it is designed to measure and display a single parameter or input at a time, making it a single channel system.

Question 11

Which technique is most widely used in the single channel data acquisition system?

Accepted Answer

Successive approximation is the most widely used technique in single channel data acquisition systems due to its balance between speed and complexity, making it suitable for a wide range of applications.

Question 12

Multichannel data acquisition system has __________

Accepted Answer

A multichannel data acquisition system is designed to handle multiple channels, allowing it to collect data from several sources simultaneously.

Question 13

Multichannel Analog Multiplexed System is __________

Accepted Answer

Multichannel Analog Multiplexed Systems are generally considered slow because they involve the transmission of multiple signals over a single channel, which can lead to delays and lower transmission speeds compared to systems that use separate channels for each signal.

Question 14

Multichannel Analog Multiplexed System utilises time __________

Accepted Answer

Multichannel Analog Multiplexed Systems utilize time by using a multiplexer (mux) to combine multiple signals into one signal for transmission. A mux selects between several analog or digital input signals and forwards the selected input into a single line, making it essential for time-division multiplexing in analog systems.

Question 15

In a Multichannel Analog Multiplexed System __________

Accepted Answer

An A/D converter is used in a multichannel analog multiplexed system to convert the analog signals from multiple channels into digital form for processing or transmission.

Question 16

Many channels can be monitored at the same time by __________

Accepted Answer

Multiplexing is the process of combining multiple signals into one signal, over a shared medium, which allows for the monitoring of many channels simultaneously.

Question 17

What is the region after the stop band frequency in the magnitude frequency response of a low pass filter?

Accepted Answer

The stop band is the region of frequencies above the stop band frequency where the filter attenuates the signal.

Question 18

Which of the following is not correct for data loggers?

Accepted Answer

Data loggers are typically portable and small, designed for convenience and accessibility in various environments. However, they are not battery-less; they often require batteries to operate, especially when deployed in remote or unpowered locations.

Question 19

Which of the following devices are similar to electronic data loggers?

Accepted Answer

Chart recorders are similar to electronic data loggers as both are used for recording data over time. Chart recorders traditionally use paper to record data, while electronic data loggers record data digitally.

Question 20

Which of the following statement is false?

Accepted Answer

All data acquisition systems are not data loggers. Data acquisition systems can also be used for real-time data analysis and control.

Quiz 8: Data Acquisition and Signal Processing Techniques