Electronics Circuits SPPU Insem Question Paper Oct 2024

Questions

1. Q1

   1. a)

      Draw and explain transfer and drain characteristics of E-MOSFET.

      [5]
   2. b)

      Define Threshold Voltage, Pinch-off Voltage, Ohmic Region, Drain Resistance, Trans-conductance of E-MOSFET.

      [5]
   3. c)

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

      [5]
   OR

2. Q2

   1. a)

      Draw the common source E-MOSFET amplifier and explain frequency response with diagram.

      [5]
   2. b)

      Explain any two non-ideal current-voltage characteristics of E-MOSFET.

      [5]
   3. c)

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

      [5]

3. Q3

   1. a)

      Explain advantages of negative feedback in amplifiers.

      [5]
   2. b)

      Explain effect of negative feedback on i) Input impedance ii) Output impedance iii) Gain iv) Bandwidth v) Gain stability

      [5]
   3. c)

      Identify topology of feedback and determine A vf , Rif, Rof for the amplifier 3 shown in Figure [3]. For the MOSFET, gm = 2mA/V, rd = 40K.

      [5]
   OR

4. Q4

   1. a)

      Explain MOSFET as Resistor.

      [5]
   2. b)

      Draw circuit diagram of RC phase shift oscillator and calculate the operating frequency, if R = 10 K  and C = 5nF.

      [5]
   3. c)

      Compare different types of feedback topologies with respect to different parameter. … … …

      [5]