Posted Date: 05 Jul 2016      Posted By:: Krishna Teja Yeluripati    Member Level: Gold  Points: 3 (Rs. 3)

# 2014 Acharya Nagarjuna University B.Tech - Semester 5 - Bapatla Engineering College - Electronic Circuits II - April 2014 Question paper

 Course: University/board: Acharya Nagarjuna University

Are you searching for the old question papers of Electronic Circuits II - Bapatla Engineering College - B.Tech? This is the original question paper from the B.Tech third year first semester exam conducted by Bapatla Engineering College in April 2014. Feel free to make a copy and use it to prepare for your upcoming exams.

III/IV B.Tech Degree Examinations, April 2014

First Semester

Electronic Circuits II

Time : 3 hours

Maximum Marks : 60

Answer ONE question from each Unit

1. Briefly explain following [12 x 1 = 12M]
a) Given transistor Ic = 26 m A. Find the value of gm at room temperature.
b) What is the relation between fβ and fT?
c) What is the value of CE short circuit current gain at signal frequency f = fβ?
d) Write the formula for emitter diffusion capacitance Ce in terms of gm and fT.
e) Draw the small signal model of FET
f) What are the advantages of SMPS over conventional power supplies?
g) Compare series and shunt voltage regulators.
h) Write the formula for overall upper 3 dB frequency of n cascaded stages.
i) In low frequency region the amplifier acts as which filter?
j) Write the formula for bandwidth of parallel resonant circuit.
k) Mention the applications of Tuned amplifiers.
l) Draw the frequency response of double tuned amplifier.

UNIT - I [1 x 12 = 12M]

2. a) Draw the circuit of hybrid-π CE transistor model and define the components.
2. b) The following low-frequency parameters are known for a given transistor at Ic = 10 m A, Vce = 10 V at room temperature. hie = 500 ohms, hoe = 4x10-5 A/V, hfe = 100 and hre = 10-4 at the same operating point, fT = 50 M Hz and Cob = 3 pF. Compute the values of all the hybrid-π parameters. (OR)
3. a) Derive the expression for CE current gain with resistive load using equivalent circuit.
3. b) Given the germanium p-n-p transistor whose base width is 10-4 cm. At room temperature and for dc emitter current of 2 mA, find the emitter diffusion capacitance and fT.

UNIT - II [1 x 12 = 12M]

4. a) Draw the equivalent circuit of common source (CS) amplifier at high frequencies and Explain.
4. b) Derive the expressions for voltage gain, input admittance and input capacitance of CS amplifier at high frequencies. (OR)
5. a) Explain the operation of SMPS with neat block diagram.
5. b) Explain design of Shunt regulator with example.

UNIT - III [1 x 12 = 12M]

6. a) Derive the low frequency response and high-frequency response of RC-coupled amplifier with expressions and graph.
6. b) Explain distortions in amplifiers. (OR)
7. a) Derive the expressions for over all band pass of cascaded stages.
7. b) Three identical cascaded stages have individual upper 3 dB frequency of 100 kHz and lower 3 dB frequency of 100 Hz. What is overall fH and fL?

UNIT - IV [1 x 12 = 12M]

8. a) Draw the Parallel-Resonant circuit and explain with Impedance function and bandwidth.
8. b) Draw the circuit of single tuned amplifier and explain its operation with frequency response. (OR)
9. a) Draw the circuit of double tuned transformer coupled amplifier and explain its operation with frequency response.
9. b) Draw the circuit of tuned secondary amplifier and explain its operation.

### Related Question Papers:

• Elements of Mechanical Engineering - Bapatla Engineering College - B.Tech 2nd Year - 2nd Semester - June 2014

• Bapatla Engineering College - Electrical and Electronic Measurements - B.Tech 2nd Year - 2nd Semester - June 2014

• B.Tech 2nd Year - 2nd Semester - Bapatla Engineering College - Electronic Circuits I - June 2014

• B.Tech 2nd Year - 2nd Semester - Data Structures using C - Bapatla Engineering College - June 2014

• Signals and Systems - Bapatla Engineering College - II/IV B.Tech - 2nd Semester - June 2014

• ### Categories

Submit Previous Years University Question Papers and make money from adsense revenue sharing program

Are you preparing for a university examination? Download model question papers and practise before you write the exam.

 Join Group

Top Contributors
TodayLast 7 Daysmore...

### Subscribe to Email

• Get Jobs by Email
• Forum posts by Email
• Articles by Email
• ### Online Members

Jintosebastian
Joyshree
SHWETA BARA
More...