Objectives:

1. To connect operational amplifier as na non-inverting amplifier

2. To measure voltage gain of an non-inverting amplifier

3. To connect operational amplifier as an inverting amplifier

4. To measure voltage gain of an inverting amplifier

Equipments and Componenents:

1. Resistor : 1kΩ and 10kΩ

2. Op-Amp : 741

3. Breadboard

4. DC Voltage supply

5. Function generator

6. Oscilloscope

7. Multimeter

8. Connecting wires.

Procedures:

a) Non-inverting Amplifier

1. Assemble circuit as in diagram on breadboard.

2. Switch on the voltage power supply Vi and set its frequency to 1kHz and voltage

amplitude 40mVpp

3. Switch on the power supply

4. Using an oscilloscope, measure Vi and Vo voltages

5. Calculate the voltage gain of a non-inverting amplifier

6. Draw graph Vi and Vo versus time obtained from an oscilloscope.

7. Discuss your observations accordingly

b) Inverting Amplifier

1. Assemble circuit as diagram on breadboard.

2. Switch on the voltage power supply Vi and set its frequency to 1kHz and voltage

amplitude 40mVpp

3. Switch on the power supply

4. Using an oscilloscope, measure Vi and Vo voltages

5. Calculate the voltage gain of an inverting amplifier

6. Draw graph Vi and Vo versus time obtained from an oscilloscope.

7. Discuss your observations accordingly

Result:

a) Non-inverting Amplifier

1. Voltage gain

2. Graph Vi and Vo versus time

b) Inverting Amplifier

1. Voltage gain

2. Graph Vi and Vo versus time

Discussion:

Suggestions for further work in the future:

1. Prepare the electrical and electronic components which in good condition.

2. Do not use red maker while writing on the whiteboard because it is unclear.

3. Use LCD projector to show how to do the experiment.

4. Use microphone to give the explanation.

Conclusions:

1. The voltage output of the amplifier in greater than voltage input

2. The voltage output of non-inverting amplifier is the same phase as the voltage

input

3. The voltage output of inverting amplifier is 180° out of phase of the voltage input

References:

1. J. David Irwin, Basic Engineering Circuit Analysis, (7th Edition), John Wiley and

Sons Inc,2002

2. David E. Johnson, John L. Hilburn, Johnny R. Johnson, Peter D. Scott, Basic

Electric Circuit Analysis, (5th Edition), Prentice Hall, 1995

3. Robert J. Herrick, DC/AC Circuits and Electronics: Principles & Applications,

Theorem Delwan Learning, New York, 2003

4. Thomas L. Floyd, Principles Of Electric Circuits: Electron Flow Version, (3rd

Edition), Macmillan Publishing Company, New York, 1993

5. Thomas L. Floyd, Principles Of Electric Circuits: Conventional Current Versions,

(8th Edition), Pearson Prentice Hall, New Jersey, 2007