Electronics Circuits SPPU Endsem Question Paper May 2025

Questions

1. Q1

   1. a)

      Enlist the advantages and disadvantages of SMPS over linear power supply. Draw the block diagram of SMPS and explain each block in detail.

      [8]
   2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]
   OR

2. Q2

   1. a)

      Draw the block diagram of a regulated DC power supply and explain the function of each block in detail.

      [9]
   2. b)

      Explain the following performance parameters of DC power supply i) Load regulation ii) Line regulation, iii) Ripple rejection and iv) Efficiency. 2

      [8]

3. Q3

   1. a)

      Explain the following op-amp parameters: i) Input offset Voltage ii) CMRR iii) Slew Rate iv) Unity gain bandwidth.

      [8]
   2. b)

      What is current minor circuit? Draw and explain working of differential amplifier with current mirror circuit. Why current mirror circuit is used in Op Amp?

      [6]
   3. c)

      State the values of all ideal parameters of Op Amp.

      Also asked:Dec 2025 ·May 2024

      [3]
   OR

4. Q4

   1. a)

      Draw block diagram of Op-Amp. Explain the functions of each block in detail.

      Also asked:Dec 2025 ·May 2024

      [8]
   2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]
   3. c)

      Explain how to improve CMMR in Op Amp.

      [3]

5. Q5

   1. a)

      What are the limitations of ideal integrator? How these are overcome in practical integrator? Draw the circuit diagram of practical integrator and its frequency response. Write equation for output voltage Vo and explain its operation.

      [9]
   2. b)

      Draw an inverting summing amplifier with three inputs. Derive an expression for its output voltage.

      [6]
   3. c)

      Draw square wave generator using Op Amp with relevant waveforms 3

      Also asked:May 2024

      [3]
   OR

6. Q6

   1. a)

      Explain with a neat circuit diagram, working of inverting symmetric Schmitt trigger with its input output waveform and hysteresis plot.

      [9]
   2. b)

      Enlist the requirements of instrumentation amplifier. Draw and explain instrumentation amplifier using three Op Amp.

      Also asked:Dec 2025

      [6]
   3. c)

      Draw full wave precision rectifier with relevant waveforms.

      [3]

7. Q7

   1. a)

      Draw circuit diagram and explain successive approximation ADC.

      [6]
   2. b)

      Explain the following characteristics of DAC i) Resolution, ii) Accuracy and iii) Settling time.

      [6]
   3. c)

      Draw the block diagram of PLL and explain each block in detail.

      [6]
   OR

8. Q8

   1. a)

      Draw and explain circuit diagram for 3- bit weighted resistor D/A converter, and give output voltage equation for the same.

      [6]
   2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]
   3. c)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]