Savitribai Phule Women’s Engineering college, Aurangabad.
Sub: Electronics Devices & Circuits
Class: SE (ECT)
Unit-1- Special Purpose Diodes
(2 marks)
1) What are the applications of Tunnel Diode?
2) What is Gunn effect?
3) Show that Gunn diode offers negative resistance?
4) What is tunneling?
5) Explain the principal of Laser Diode?
(8 marks)
1) Explain Laser Diode in detail?
2) Write short note on.
i)
Schotty Diode
ii)
Tunnel Diode
3) Explain Gunn Diode in detail?
4) Explain Tunnel Diode in detail?
5) Explain read diode in detail?
6) Explain CCD’s in detail?
7) Write short notes on.
i)
IMPATT Diode
ii)
TRAPATT Diode
iii)
BARITT Diode.
Unit-2 Power Amplifier
(2 marks)
1) Give the function of heat sink?
2) What is heat sink?
3) List the applications of power amplifier?
4) What is cross over distortion?
5) Define efficiency of a power amplifier?
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Sub Teacher: Prof. K.S.Ingle
Department: EC/ECT
Savitribai Phule Women’s Engineering college, Aurangabad.
Sub: Electronics Devices & Circuits
Class: SE (ECT)
6) Give the difference between voltage amplifier and power amplifier?
7) Compare class B push-pull and complementary symmetry configuration.
8) What is the difference between class B and class AB operation?
9) What is the advantage of using the output transponder for class A amplifier?
10) Why the efficiency of class A amplifier is the lowest of all the power amplifier?
(8 marks)
1) Draw and explain class A power amplifier?
2) What are different distortions observed in a power amplifier? Explain?
3) Prove that, for an idea class-B amplifier, the wax conversion efficiency is 78.5%.
4) Write short notes on
i)
Heat sink
ii)
Class AB power amplifier
iii)
Classification of power amplifier
5) Explain class B push-pull power amplifier in detail.
6) Show, that the maximum collector efficiency of class A power amplifier is 50%.
7) Explain Class-C power amplifier.
8) Explain complementary symmetry push-pull amplifier.
Unit- 3- Differential Amplifier
(2 marks)
1. Define CMRR
2. State types of Differential Amplifier.
3. State the important feature of differential amplifier.
4. Why Op-amp is named as operational amplifier.
5. Draw the symbol of Op-Amp & lable the terminals of the same.
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Sub Teacher: Prof. K.S.Ingle
Department: EC/ECT
Savitribai Phule Women’s Engineering college, Aurangabad.
Sub: Electronics Devices & Circuits
Class: SE (ECT)
6. List any four Advantages of Op-Amp.
7. Write any six application of Op-Amp .
8. Draw the equivalent circuit of operational amplifier.
9. Draw the block diagram of operational amplifier.
10. State the ideal characteristics of Op-Amp.
11. Draw ideal & practical transfer characteristics of Op-Amp.
12. Define Op-Amp Parameter.
i)
Slew rate
ii)
I/P bias current
13. Draw the circuit diagram of differential amplifier with constant source.
Unit- 4- Wave Shaping Circuits
(2 marks)
1. List the linear and non linear wave shaping circuits?
2. Define clamper circuit and give its types?
3. Define clipper and give its types?
4. Draw the circuit diagram of differentiator.
5. Draw the circuit diagram of RC Integrator.
6. State conditions for differentiation.
7. State conditions for Integration.
8. State any two application of clipper and clampers.
9. Draw the response of integrator circuit to sine wave input.
Unit-4- Wave Shaping Circuits
(8 marks)
1. Explain RC Differentiator?
2. What is clamper circuit? Explain their types?
3. Explain RC integrator circuit?
4. Draw and explain RC differentiator circuit? What condition must be satisfied to achieve
good differentiation?
5. Draw thr circuit diagram of a diode clipper to clip a 5v sine wave input signal at +3v .
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Sub Teacher: Prof. K.S.Ingle
Department: EC/ECT
Savitribai Phule Women’s Engineering college, Aurangabad.
Sub: Electronics Devices & Circuits
Class: SE (ECT)
6. Write short notes on.
i)
Clipping Circuit
ii)
Diode Clamper
iii)
RL Integrator
Unit- 5- Multiviabrator
(2 marks)
1. Define duty cycle state the duty cycle of all A stable Multivibrator.
2. Draw the waveforms at collector of both transistor for A stable Multivibrator.
3. Give two difference between A stable, Mono stable and Bi-stable Multivibrator.
4. Give to difference between astable, monosatble and bi-stable multivibrator.
(8 marks)
1. Draw & explain astable multivibrator.
2. Draw & explain the various triggering schemes used in multivibrator circuits?
3. Draw & explain monastable multivibrator
4. Draw & explain Bi-stable Multivibrator
5. Explain Asymmetrical triggering method in bi-stable multivibrator.
6. Determine the value of capacitors to be used in as astable multivibrator to provide a train
pulse of 1 µsec. wide at a repetion rate of 100khz. Assume R1= R2=100kΩ.
7. Write short notes on.
i)
Speed-up capacitors
ii)
Schmitt trigger
Unit- 6- Blocking Oscillators and Time Based Generator
(2 marks)
1) Define the terns with respect to a time base signal
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Sub Teacher: Prof. K.S.Ingle
Department: EC/ECT
Savitribai Phule Women’s Engineering college, Aurangabad.
Sub: Electronics Devices & Circuits
Class: SE (ECT)
i)
Sweep time
ii)
Sweep speed
2) Draw output waveform of UJT relaxation oscillator?
3) Draw miller sweep generator
4) What are the general consideration of miller and bootstrap time base circuit?
5) Draw a neat sketch of a time base signal.
(8 marks)
1. Explain the miller sweep generator?
2. Explain push pull operation of astable blocking oscillator?
3. Explain Boot-strap sweep generator?
4. Explain UJT sweep generator?
5. Explain current time base generator?
6. What is blocking Oscillator? Explain push-pull operation of astable blocking oscillator.
7. What is time base generator? What are the various errors associated with it? Explain.
8. Write short on
i)
Current sweep generator
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Sub Teacher: Prof. K.S.Ingle
Department: EC/ECT