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TAs: Deniz Aktas, Emine Bardakci

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The switch in the amplifier is software controlled. Closing and opening the switch yields two different possible gains.

2. Pre-Lab Quiz

  • Quiz Date: xxxxxx

  • XXXXXXXXXXXXXXXXXXXXXXXXX

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  1. Non-Inverting Amplifier

    Launch Instructions:

    • Connect both the output channel A/AO0 and A/AI0 to the input socket of the non-inverting amplifier (socket 15) on your measurement board. Note: The stimulus signal generated from channel A/AO0 is fed through the input of the amplifier. The same signal is read from the amplifier input using into channel A/AI0. This serves the dual purpose of generating the signal we want to pass through the amplifier on the board and reading that signal back into the NI ELVIS III to programmatically display it.

    • Connect B/AI0 to the output socket of the non-inverting amplifier (socket 16).

    • Connect AMP to analog ground.

    image-20240905-181028.png

    Run the main VI and from the amplifier configuration dropdown list, choose non-inverting amplifier x2 (low gain).

    image-20240905-181037.png

5. Post-Lab Report

  • Due Date: xxxxxx

The report for Procedure 1 is expected to include:

·       All the screenshots of Block Diagram and Front Panel

Part 1

1

Set the Sine Wave Frequency to 10 Hz. What is the amplitude of the Response signal?

Is the signal lower or higher than the cut-off, and is it getting passed or blocked? Put the screenshot.

 

2

Set the Sine Wave Frequency to 2.5 kHz. What is the amplitude of the Response signal? Put the screenshot.

 

3

Set the Sine Wave Frequency to 3.3 kHz. What is the amplitude of the Response signal? Put the screenshot.

 

4

Set the Sine Wave Frequency to 6 kHz. What is the amplitude of the Response signal? Put the screenshot.

Is the signal lower or higher than the cut-off, and is it getting passed or blocked?

 

Part 2

1

Set the Sine Wave Frequency to 10kHz. What is the amplitude of the Response signal? Put the screenshot.

Is the signal lower or higher than the cut-off, and is it getting passed or blocked?

 

2

Set the Sine Wave Frequency to 300Hz. What is the amplitude of the Response signal? Put the screenshot.

 

3

Set the Sine Wave Frequency to 80Hz. What is the amplitude of the Response signal? Put the screenshot.

 

4

Set the Sine Wave Frequency to 10Hz. What is the amplitude of the Response signal? Put the screenshot.

Is the signal lower or higher than the cut-off, and is it getting passed or blocked?

 

Part 3

1

Set the Stimulus Amplitude to 1V. Confirm from the Stimulus Voltage indicator that the value is 1V. What is the response Voltage? Put the screenshot.

 

2

What is the gain using the value you recorded in the previous question?

 

3

Choose inverting amplifier gain x10 (high gain) from the Amplifier Configuration dropdown list.

Set the Stimulus Amplitude to 1V. Confirm from the Stimulus Voltage indicator that the value is 1V. What is the response Voltage? Put the screenshot.

What is the gain using the value you recorded in the previous question?

 

4

Record the differences between the two gain values you obtained using the formulas and the two gain values you computed through the VI, low gain and high gain.

Based on the circuit schematic shown for the amplifier on the application board, explain in your own words why the gain changes.

 

Part 4

1

Set the stimulus amplitude to 1V. Confirm from the Stimulus voltage indicator that the value is 1V. What is the response Voltage? Put the screenshot.

 

2

Using the value you recorded in the previous question, what is the gain?

 

3

From the amplifier configuration dropdown list, choose non-inverting amplifier x10 (high gain)

Set the stimulus amplitude to 1V. Confirm from the Stimulus voltage indicator that the value is 1V. What is the response Voltage? Put the screenshot.

What is the gain using the value you recorded in the previous question?

 

4

Record the differences between the two gain values you obtained using the formulas and the two gain values you computed through the VI, low and high gain.

 

Additional Resources:

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Responsible TAs: