Lab: Operational Amplifiers Part #1 Non-Inverting …inc.kmutt.ac.th/course/inc223/LabOpamp_1_60.pdf3 Part #2 Inverting Amplifier Circuit Objectives 1. Study basic concept of inverting

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Lab: Operational Amplifiers Part #1 Non-Inverting Amplifier Circuit Objectives

1. Study basic concept of non-inverting amplifier 2. Can explain the characteristic of non-inverting amplifier circuit.

Equipment

1. Digital Multimeter 1 set 2. Oscilloscope 1 set 3. Op-amp experimental board 1 set 4. Cable 1 set

Procedures

Figure 1.1 Non-Inverting Amplifiers

1. From figure 1.1, carefully wire cable to build non-inverting amplifier circuit on Op-amp experimental board. Don’t connect power supply to experimental board.!!!

2. Power on a dual power supply then adjust DC voltage to +12 VDC and -12 VDC for each channels. Power off dual power supply.

3. Connect outputs of a dual power supply to the supply of op-amp. Please carefully check polarities of power supply input of op-amp.

4. Set CH1 and CH2 of oscilloscope to 0.5 Volt/div. and time base to 1 ms/div. Connect probes of CH1 at input of non-inverting amplifier circuit and CH2 at output of this circuit.

5. Set the function generator to generate sine wave output at frequency of 400 Hz with amplitude 1 Vp-p.

6. Power on a dual power supply. Measure signal at input and output of non-inverting amplifier. Observe the difference between the input and output signals on display of oscilloscope.

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7. Record waveforms of input and output signals and calculate peak-peak voltage value.

Volt/Div : ………………………. Volt/Div : ………………………. Time/Div : ………………………. Time/Div : ………………………. Vp-p : ………………………. Vp-p : ……………………….

8. Calculate the voltage gain from the theory.

9. Adjust RB by values given in table 1.1, compare the output voltage value obtained from

the experiment with the calculated value using equation.

Table 1.1

RB VO(p-p) from experiment AV from experiment AV from theory

20KΩ

27KΩ

47KΩ

68KΩ

Experimental Discussion

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Part #2 Inverting Amplifier Circuit Objectives

1. Study basic concept of inverting amplifier 2. Can explain the characteristic of inverting amplifier circuit.

Equipment


Procedures

Figure 2.1 Inverting Amplifiers

1. From figure 2.1, carefully wire cable to build inverting amplifier circuit on Op-amp experimental board. Don’t connect power supply to experimental board.!!!


3. Connect outputs of a dual power supply to the supply of op-amp. Please carefully

check polarities of power supply input of op-amp.

4. Set CH1 and CH2 of oscilloscope to 0.5 Volt/div. and time base to 1 ms/div. Connect probes of CH1 at input of inverting amplifier circuit and CH2 at output of this circuit.

5. Set the function generator to generate the sine wave output at frequency of 500 Hz

with amplitude 1 Vp-p.

6. Power on a dual power supply. Measure signal at input and output of inverting amplifier. Observe the difference between the input and output signals on display of oscilloscope.

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7. Record waveform and voltage peak-peak value of input and output signals.


8. Calculate the voltage gain from the theory.

9. Adjust RB by values given in table 2.1, compare the output voltage value obtained from the experiment with the calculated value from equation.

Table 2.1

RB VO(p-p) from experiment AV from experiment AV from theory

20KΩ

27KΩ

47KΩ

68KΩ


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Part #3 Voltage Follower Amplifier Circuit Objectives

1. Study basic concept of voltage follower amplifier. 2. Can explain characteristic of voltage follower amplifier circuit.

Equipment


Procedures

Figure 3.1 Voltage Follower Amplifiers

1. From figure 3.1, carefully wire cable to build voltage follower amplifier circuit on Op-

amp experimental board. Don’t connect power supply to experimental board.!!!




4. Set CH1 and CH2 of oscilloscope to 0.5 Volt/div. and time base to 1 ms/div. Connect probes of CH1 at input of voltage follower amplifier circuit and CH2 at output of this circuit.

5. Set the function generator to generate sine wave output at frequency 500 Hz with

amplitude 1.5 Vp-p.

6. Power on a dual power supply. Measure signal at input and output of voltage follower amplifier. Observe the difference between the input and output signals on display of oscilloscope.

7. Record results of experiment

7.1 Shape of waveform

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Volt/Div : ………………………. Volt/Div : ………………………. Time/Div : ………………………. Time/Div : ……………………….

7.2 Maximum output voltage : Vout(max) = ………… Vp-p

8. Increase amplitude of input waveform to 5 Vp-p. Record results of experiment. 8.1 Shape of waveform

Volt/Div : ………………………. Volt/Div : ………………………. Time/Div : ………………………. Time/Div : ………………………. 8.2 Maximum output voltage : Vout(max) = ………… Vp-p

9. Calculate voltage gain by using


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Part #4 Summing Amplifier Circuit

Objectives

1. Study basic concept of summing amplifier. 2. Can explain the characteristic of summing amplifier.

Equipment


Procedures

Figure 4.1 Summing Amplifiers

1. From figure 4.1, carefully wire cable to build summing amplifier circuit on Op-amp experimental board. Don’t connect power supply to experimental board.!!!





5. Set the function generator to generate sine wave output at frequency of 300 Hz with

amplitude 1 Vp-p.

6. Power on a dual power supply. Measure signal at input and output of voltage follower amplifier. Observe the difference between input and output signals on display of oscilloscope.

7. Measure output voltage

7.1 Output voltage of voltage follower : V2 = ……………………….. Vp

7.2 Output voltage of summing amplifier : Vout = ……………………….. Vp

8. Calculate summing output voltage by using

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= ……………………….. Vp

Compare output voltage from the calculation with experimental result (from procedure 7.2)

9. Record signal waveform of Vin, V2, and Vout


Volt/Div : ………………………. Time/Div : ………………………. Vp-p : ……………………….

10. Power off a dual power supply. Build a non-inverting amplifier and re-place the voltage follower amplifier (figure 4.2) in figure 4.1.

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Figure 4.2 Non-Inverting Amplifiers

11. Power on a dual power supply. Measure 11.1 Output voltage of non-inverting amplifier : V2 = ……………………….. Vp




Volt/Div : ……………………….

Time/Div : ……………………….

Vp-p : ……………………….

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13. Power off a dual power supply. Build an inverting amplifier and re-place the voltage follower amplifier (figure 4.3) in figure 4.1.

Figure 4.3 Inverting Amplifiers

14. Power on a dual power supply. Measure

14.1 Output voltage of inverting amplifier : V2 = ……………………….. Vp




Volt/Div : ……………………….

Time/Div : ……………………….

Vp-p : ……………………….

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Part #5 Integrator Circuit

Objectives

1. Study basic concept of Integrator circuit using Op-Amp. 2. Can explain characteristic of Integrator circuit using Op-Amp.

Equipment


Formula

1. Output Voltage : Procedures

Figure 5.1 Integrator Circuit

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5. Set the function generator to generate the square wave output at frequency of 10 kHz

with amplitude 1 Vp-p.

6. Power on a dual power supply. Measure signal at input and output of the circuit. Observe the difference between the input and output signals on display of oscilloscope.


Vp-p : ………………………. Vp-p : ……………………….

7. Change the frequency of square wave to 100 Hz. Measure and record signals at input and output of the circuit. Observe the difference between the input and output signals on display of oscilloscope.

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Vp-p : ………………………. Vp-p : ………………………. Experimental Discussion

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Part #6 Differentiator Circuit

Objectives

1. Study basic concept of Integrator circuit using Op-Amp. 2. Can explain characteristic of Integrator circuit using Op-Amp.

Equipment


Formula

1. Output Voltage : Procedures

Figure 5.1 Differentiator Circuit





11. Set the function generator to generate triangle wave at frequency of 400 Hz with amplitude 1 Vp-p.

12. Power on a dual power supply. Measure and record signals at input and output of

the circuit. Observe the difference between the input and output signals on display of oscilloscope.

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Vp-p : ………………………. Vp-p : ……………………….

13. Change the frequency of triangle wave to 1 kHz. Measure and record signals at input and output of the circuit. Observe the difference between the input and output signals on display of oscilloscope.


Vp-p : ………………………. Vp-p : ……………………….

14. Change the frequency of triangle wave to 30 kHz. Measure and record signals at input and output of the circuit. Observe the difference between the input and output signals on display of oscilloscope.

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Vp-p : ………………………. Vp-p : ………………………. Experimental Discussion

Documents

Lab: Operational Amplifiers Part #1 Non-Inverting …inc.kmutt.ac.th/course/inc223/LabOpamp_1_60.pdf3 Part #2 Inverting Amplifier Circuit Objectives 1. Study basic concept of inverting