Applied Electronics EE-204 PTU 4th Sem B.Tech EE April 2013 Paper
Download Previous Year PTU Question Papers of Analog Electronics 4th Sem April 2013 Paper
Total No. of Questions : 09Â Â Â Â Â Â Â Â Â Â Total No. of Pages : 02
          B.Tech. (EE/EEE) (Sem.–4th)                        APPLIED ELECTRONICS
Subject Code : EE-204Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Paper ID : [A0408]
  Time : 3 Hrs.                                            Max. Marks : 60
  INSTRUCTION TO CANDIDATES :
   INSTRUCTION TO CANDIDATES :
  1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO      marks each.
  2. SECTION-B contains FIVE questions carrying FIVE marks each and            students has to attempt any FOUR questions.
  3. SECTION-C contains THREE questions carrying TEN marks each and          students has to attempt any TWO questions.
Analog Electronics 4th Semester April 2013 Paper
                        SECTION-A
Q1.Write briefly :Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 10×2=120
  (a) What is a linear amplifier?
  (b) Which transistor configuration behaves as constant current source and        why?
  (c) What is Class-AB operation?
  (d) What is loading effect in multistage transistor amplifier?
  (e) How is distortion minimized in power amplifiers?
  (f) What is the importance of unity gain frequency in an amplifier?
  (g) The upper 3 dB frequency is 20 KHz and the gain at this frequency is 150.       Calculate the gain at frequency of 50 KHz.
  (h) Define thermal runaway.
  (i) What is the purpose of feedback circuit in an oscillator and what type of       feedback does it use?
  (j) What is the difference between series and shunt regulator?
                   SECTION-B
  Q2. Attempt any FOUR questions.                               4×5=30
   2. Describe the amplifying action of a transistor.
   3. The upper and lower 3dB frequencies of a single stage amplifier are 18         KHz and 30 KHz respectively. Find the frequency range over which the        voltage gain is dropped by less than 1.5 dB of its midband value.
   4. What are the factors that affect the frequency stability of oscillators?          Explain.
   5. Draw the circuit of phase inverter. Explain its utility in power amplifiers.
   6. Describe the operation of SMPS.
                   SECTION-C
Q3. Attempt any TWO questions.                            10×2=20
   7. Describe the graphical method of obtaining h-parameters for CE               transistor configuration.
   8. Design a phase shift oscillator to oscillate at 100 Hz. 9. Write short notes       on the following :
     i) Difference amplifiers
     ii) OPAMP voltage regulator
Linear amplifier
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Explain Which transistor configuration behaves as constant current sourceÂ
Class-AB operation
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Loading effect in multistage transistor amplifier
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Explain How is distortion minimized in power amplifiers
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Importance of unity gain frequency in an amplifier
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Upper 3 dB frequency is 20 KHz and the gain at this frequency is 150. Calculate the gain at frequency of 50 KHz.
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Thermal runaway.
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Purpose of feedback circuit in an oscillator and what type of feedback does it use
Difference between series and shunt regulator
FALSE
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 Analog Electronics 4th Sem April 2013 PTU Solved Paper Click Here
Amplifying action of a transistor.
Upper and lower 3dB frequencies of a single stage amplifier are 18 KHz and 30 KHz respectively. Find the frequency range over which the voltage gain is dropped by less than 1.5 dB of its midband value.
Factors that affect the frequency stability of oscillators
Circuit of phase inverter.
Explain its utility in power amplifiers.
Operation of SMPS
 Analog Electronics 4th Sem April 2013 PTU Paper Click Here
Graphical method of obtaining h-parameters for CE transistor configuration.
Design a phase shift oscillator to oscillate at 100 Hz.Â
Short notes on the following :
i) Difference amplifiers
ii) OPAMP voltage regulator
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