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Electronic Devices and Circuits 1 Question Paper - May 18 - Electronics Engineering (Semester 3) - Mumbai University (MU)
written 4.9 years ago by gravatar for teamques10 teamques10 ★ 64k
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written 4.9 years ago by gravatar for teamques10 teamques10 ★ 64k

Electronic Devices and Circuits 1 - May 18

Electronics Engineering (Semester 3)

Total marks: 80
Total time: 3 Hours INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

Solve any four:

1.a. What happens when pn junction diode is made forward bias, explain considering any suitable application.
(5 marks) 00

1.b. Explain how CC configuration of BJT gives voltage gain less than 1
(5 marks) 00

1.c. Explain with the help of construction that MOSFET gives more input resistance than JFET
(5 marks) 00

1.d. What is varactor Diode, also state its applications.
(5 marks) 00

1.e. Compare C, L and LC filters.
(5 marks) 00

2.a. Draw Energy band diagram of pn junction diode under:

  1. Zero Bias.

  2. Forward Bias.

  3. Reverse Bias.

(10 marks) 00

2.b. For the given circuit find Steady State DC Parameters Icq and Vceq. Given $\beta = 100$ and VBE = 0.7 V, also state in which region the circuits is working.

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(10 marks) 00

3.a. For the given MOSFET amplifier, Determine IDq, VGSq and VDS.

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(10 marks) 00

3.b. Explain working principle, characteristics and applications of Photodiode.
(10 marks) 00

4.a. What is the need of Filters, Explain L filter circuit?
(10 marks) 00

4.b. For the voltage divider biased BJT amplifier without bypass capacitor circuit derive equation of input resistance, Voltage gain, current gain and output resistance.
(10 marks) 00

5.a. Design Single Stage CE amplifier for the given specifications $ Av \geq 100, S = 10, Vo = 3 V, fL = 20 HZ $, use transistor BC 147 B. Use coupling and bypass capacitor as $C1 = C2 = 10\mu F$ and $CE = 100\mu F$
(15 marks) 00

5.b. What is clamping circuit, explain with neat input and output waveforms for negative Clamping circuit.
(5 marks) 00

6.a. For the voltage divider biased E MOSFET circuit derive equation of input Resistance, Voltage gain and output resistance.
(10 marks) 00

6.b. Derive equation of input resistance, Current gain and Voltage gain for CC amplifier.
(10 marks) 00

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