# 1 Lab: Operational Amplifiers Part #1 Non

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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.
2.
3.
4.
Digital Multimeter
Oscilloscope
Op-amp experimental board
Cable
1 set
1 set
1 set
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 and voltage peak-peak value of input and output signals.
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….
8. Calculate the voltage gain by
9. Adjust RB by values given in table 1.1, compare the output voltage value obtained from
the experiment with the calculated value from equation.
Table 1.1
RB
VO(p-p) from experiment
20KΩ
27KΩ
47KΩ
68KΩ
Experimental Discussion
AV from experiment
AV from calculation
3
Part #2 Inverting Amplifier Circuit
Objectives
1. Study basic concept of inverting amplifier
2. Can explain the characteristic of inverting amplifier circuit.
Equipment
1.
2.
3.
4.
Digital Multimeter
Oscilloscope
Op-amp experimental board
Cable
1 set
1 set
1 set
1 set
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.!!!
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 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.
4
7. Record waveform and voltage peak-peak value of input and output signals.
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….
8. Calculate the voltage gain by
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
20KΩ
27KΩ
47KΩ
68KΩ
Experimental Discussion
AV from experiment
AV from calculation
5
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
1.
2.
3.
4.
Digital Multimeter
Oscilloscope
Op-amp experimental board
Cable
1 set
1 set
1 set
1 set
Procedures
Figure 3.1 Voltage Follower Amplifiers
1. From figure 3.1, carefully wire cable to build voltage follower amplifier circuit on Opamp 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 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
6
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
Experimental Discussion
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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
1.
2.
3.
4.
Digital Multimeter
Oscilloscope
Op-amp experimental board
Cable
1 set
1 set
1 set
1 set
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.!!!
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 voltage follower amplifier circuit and CH2 at output of this
circuit.
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
7.2
:
Output voltage of summing amplifier :
8. Calculate summing output voltage by using
V2
= ……………………….. Vp
Vout = ……………………….. Vp
8
= ……………………….. Vp
Compare output voltage from the calculation with experimental result (from procedure
7.2)
9. Record signal waveform of Vin, V2, and Vout
10.
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
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.
12.
Power on a dual power supply. Measure
11.1 Output voltage of non-inverting amplifier :
V2
11.2 Output voltage of summing amplifier
Vout = ……………………….. Vp
:
= ……………………….. Vp
Record signal waveform of Vin, V2, and Vout
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….
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13.
Volt/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
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
:
14.2 Output voltage of summing amplifier :
15.
V2
= ……………………….. Vp
Vout = ……………………….. Vp
Record signal waveform of Vin, V2, and Vout
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….
11
Volt/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Experimental Discussion
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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
1.
2.
3.
4.
Digital Multimeter
Oscilloscope
Op-amp experimental board
Cable
1 set
1 set
1 set
1 set
Formula
1. Output Voltage
:
Procedures
Figure 5.1 Integrator Circuit
1. From figure 5.1, carefully wire cable to build summing 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 voltage follower amplifier circuit and CH2 at output of this
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.
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
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.
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….
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Part #6
Differentiator Circuit
Objectives
3. Study basic concept of Integrator circuit using Op-Amp.
4. Can explain characteristic of Integrator circuit using Op-Amp.
Equipment
5.
6.
7.
8.
Digital Multimeter
Oscilloscope
Op-amp experimental board
Cable
1 set
1 set
1 set
1 set
Formula
2. Output Voltage
:
Procedures
Figure 5.1 Differentiator Circuit
8. From figure 5.1, carefully wire cable to build summing amplifier circuit on Op-amp
experimental board. Don’t connect power supply to experimental board.!!!
9. Power on a dual power supply then adjust DC voltage to +12 VDC and -12 VDC for each
channels. Power off dual power supply.
10. Connect outputs of a dual power supply to the supply of op-amp. Please carefully
check polarities of power supply input of op-amp.
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.
15
13.
14.
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….
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.
Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….
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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Volt/Div
: ……………………….
Volt/Div
: ……………………….
Time/Div
: ……………………….
Time/Div
: ……………………….
Vp-p
: ……………………….
Vp-p
: ……………………….