Rajiv Gandhi Proudyogiki Vishwavidyalaya 2010 B.E Electronics & Communication Engineering ec-404 electronic circuit s - Question Paper

R.G.P.V. BHOPAL M.P.
B.E.(4TH SEMESTER) exam – JUNE 2010
ELECTRONIC CIRCUIT (EC-404)
Time:3 Hours Max Marks:100 Min Marks: 35
UNIT-1
Q.1: (a)Explain Self Biased Circuit with suitable example and also compute the Stability
Factor?[10]
(b)What do you mean by Q-Point And Load Line?Explain with suitable example?[10]
OR
Q.2:(a)What do you mean by H-parameter? compute current gain ,Voltage gain andinput impedance?[10]
(b)Explain working of transistor at high frequency? [10]
UNIT-2
Q.3 (a)Define the effect of negative feedback on gain?[10]
(b)Explain the working of RC-Phase Shift Oscillator?[10]
OR
Q.4: (a) Differentiate ranging from positive and negative feedback?[5]
(b)Explain the condition for sustained oscillation?[5]
(c)Explain the working of Wein Bridge Oscillator?[10]
UNIT-3
Q.5:(a)Explain the working of Push-Pull Amplifier?Also compute the formula for efficiency?[10]
(b)Explain the working of Transformer Coupled Amplifier?[10]
OR
Q.6: (a) What do you mean by Tuned Amplifier? Also write its application in short?[10]
(b) discuss the working of Complementary Symmetry Amplifier?[10]

UNIT-4
Q.7: (a)What is the effect of cascading on Bandwidth? [10]
(b) discuss the working of direct Coupled Amplifier?[10]
OR
Q.8: (a) Write short note on Bootstrapping circuit?[10]
(b) Write short note on Constant Current source and Current Mirror circuit?[10]

UNIT-5
Q.9:(a)What is Operational-Amplifiers? Also write down the characteristics of ideal OP- AMP? [10] (b)What are the important parameters of an Operational-Amplifier?Explain every parameter in detail?[10]
OR
Q.10(a)Write short notes on: (Any3) [15]
(i) Logarithmic Amplifiers
(ii) Instrument Amplifiers
(iii) Function Generators
(iv) Square Wave generators
(v) Integrator or Differentiator .
(b)Sketch the circuit of summing amplifier using OP-AMP[5]
Vout = -V1+2V2-3V3

Earning:   Approval pending.