**EC6202 Electronic Devices and Circuits Important Questions**

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Important Part A , Part B 16 Mark Questions – DOWNLOAD PDF >>

**Anna University Exams Nov / Dec 2017 – Regulation 2013**

**Important Questions – 3rd Semester BE/BTECH**

**EC6202 Electronic Devices and Circuits**

**Semester:**03

**Department**: Electrical and Electronics Engineering (EEE)

**Year**: Second Year (II Year)

**Regulation**: 2013

**Subject Code**: EC6202

**Subject Name**: Electronic Devices and Circuits

**Content**:EC6202 Electronic Devices and Circuits – Important Part B 16 Mark Questions

**By**: www.exammain.com

__Unit 1__

1.Explain the working of PN junction diode along with its VI characteristics.

2. Explain the operation of bridge rectifier with neat diagram.Derive the ripple factor, TUF and efficiency.

3. How zener diode can be used as shunt regulator.?

4. Explain the working of laser diode.

5. Explain the working of zener diode.

**Unit 2**

1. Explain the construction and working of SCR

2. With neat sketch, explain the input and output characteristics of CE configuration.

3.Explain the different types of biasing in BJT.

4. Compare CC,CE and CB configuration.

5. With neat sketch, describe the construction and working of n-channel JFET.

**UNIT 3**

1.Derive the h-parameters for CC amplifier.

2.A common source FET amplifier uses load resistance Rd=100kΩand an unbypassed resistor Rs in the source circuit.

The FET has drain resistance Rd=200KΩ nad μ=20.compute the voltage gain and output impedance Ro, for Rs=10KΩ.

3.Draw the small signal equivalent circuit of FET amplifier in CS connection and derive the equations for voltage gain,

input impedance and output impedance.

4.Using the hybrid equivalent model, analyze and deduce the expression for the parameters using the circuit sketch.

what is the significance of this approach

5. For a CB amplifier driven by a voltage source of internal resistance Rs = 1200 Ω, the load impedance is a resistor

RL= 1000Ω. The h-parameters are hib= 22Ω, hrb =3 x 10-4 ,hfb= -0.98 and hob= 0.5 µA/V. Compute the current gain

Ai, input impedance Ri, voltage gain Av, overall current gain Ais, overall voltage gain Avs, and output impedance Zo.

**Unit 4**

1.Derive the equation for differential mode gain and common mode gain of a differential amplifier

2.Draw the single tuned amplifier and explain the frequency response

3.Explain in detail classification of power amplifier.

4.With the neat diagram explain the class A, class B and class AB amplifier and derive its efficiency.

5.explain in detail about cascaded amplifiers

**Unit 5**

1.Draw the block diagram of voltage series feedback amplifier and derive the equation for input impedance output

impedance and the voltage gain. Calculate the voltage gain ,input and output resistance of a voltage series feedback

amplifier having AV=300,Ri=1.5k Ω ,Ro=50k Ω and β=1/15

2.Discuss the various topologies of feedback amplifier

3.Draw the circuit diagram and explain the principle of operation of the following oscillators: i)RC phase shift

oscillator(8) ii) Any one LC oscillator

4.Explain the effects of negative feedback in amplifiers

5.Draw the circuit of Hartley oscillator and explain its working. Derive the expressions for frequency oscillation and

condition for starting of oscillation.

Questions Are Expected for University Exams This May or may Not Be Asked for Exams

EC6202 Electronic Devices and Circuits –Important Questions – DOWNLOAD PDF >>

Important Part A , Part B 16 Mark Questions –DOWNLOAD PDF>>

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