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YILDIRIM BEYAZIT UNIVERSITYECE-206 ELECTRONICS I LAB 7

OPERATIONAL AMPLIFIER EXPERIMENT

PRE LAB1. Show the relation of output and input voltage of the following circuit is

differentiation.

Figure 1 The Differentiator

2. Show the relation of output and input voltage of the following circuit isintegration.

Figure 2 The Integrator

EXPERIMENT

1. Inverting AmplifierThe configuration and pin diagram of the opamp is given Figure 3 .

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Figure 3 The LM741 opamp pin diagram and schematic

a. Build the circuit shown in Figure 4 . Ri=1k and Rf=10k. Dontforget to connect pin 4 to -15 V and and pin 7 to +15 V. Do not turnon the supply yet. You can leave pin 1,5, and 8 unconnected.

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Figure 4 The Inverting Amplifier

b. Switch on the power supply and apply different voltages in therange 0- 1.5V in steps of 0.2 V at the inverting terminal (Vin). Payattention to give input from the inverting input.

c. Measure the corresponding output voltages with the multimeterand calculate gain Vo/Vin. Note the sign of the output voltage.

d. Give a sinusoidal input to the amplifier using the function generator.Apply 1 kHz, 0.5 Vpp sine wave and observe the output withoscilloscope. Plot input and output waveforms and calculate thegain. What is the phase shift between input and output waveforms?

e. Increase the amplitude of the sine wave and observe when there isclipping. Write the amplitude when you see the clipping and explainthe reason in the report.

2. Noninverting Amplifiera. Build the circuit shown in Figure 5 . R1=10k and R2=1k. Dont

forget to connect pin 4 to -15 V and and pin 7 to +15 V. Do not turnon the supply yet. You can leave pin 1,5, and 8 unconnected.

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Figure 5 The Noninverting Amplifier

b. Switch on the power supply and apply different voltages in therange 0- 1.5V in steps of 0.2 V at the inverting terminal (Vin). Payattention to give input from the noninverting input.

c. Repeat step c,d,e from the first part.

3. Differentiatora. Build the circuit shown in Figure 6 . Take R=5k and C=0.1F. Dont

forget to connect pin 4 to -15 V and and pin 7 to +15 V. Do not turnon the supply yet. You can leave pin 1,5, and 8 unconnected.

Figure 6 The Differentiator

b. Apply 500Hz, 0.5 Vpp triangular wave from the input. Observe theoutput with oscilloscope. Plot input and output waveforms.

c. Add DC offset to the input signal, is there any change on the outputsignal? Why?

4. Integratora. Build the circuit shown in Figure 7 . R=5k and C=0.1F. Dont forget

to connect pin 4 to -15 V and and pin 7 to +15 V. Do not turn on thesupply yet. You can leave pin 1,5, and 8 unconnected.

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Figure 7 The Integrator

b. Apply 60Hz, 0.5 Vpp square wave from the input. Observe theoutput with oscilloscope. Plot input and output waveforms.

c. Change the function generator back to a sine wave input, sweepfrequency from 100Hz to 100kHz and observe the change of thegain with frequency.