Engineering BE Electronics and Telecommunication Sem 3 December 2022 2022 Electronics Devices And Circuits Question Paper - Mumbai University | munotes
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Questions asked in this paper
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Q1 Solve any Four 5 marks each A Explain the operation of a semiconductor pn junction diode with the help of B Explain Miller’s capacitance theorem C Compare BJT CE amplifier and CS amplifier D What is crossover distortion in Class B power amplifiers? E Let Vpp = 5V, = 1V, = and R = 1KQ. What should be (W/L), needed for creating = 1mA? What should be (W/L), if
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Q2 10 marks each A Design a feedback bias circuit for n-channel E-MOSFET with operating drain current of 0.5 mA. Given: Vpp = 5 V, k’, = 100 W wm, L = 180 nm, = 1 V, Use a standard resistor value for Rp and recalculate Ip and Vp. Refer fig. 2 Paper Subject Code: 51222 Electronics Devices and Circuits B Draw a small signal equivalent circuit of an E-MOSFET CS amplifier given in fig. 3 and derive the expression for voltage gain, input resistance and output resistance A Explain construction and working of n-channel E-MOSFET 5 marks B What is thermal runaway and how it can be avoided? 5 marks C Calculate low cutoff frequencies due to coupling and bypass capacitors of the circuit given in fig. 4 10 marks A Determine fg and fr for the given circuit. Assume Ig = 1.65 mA. Refer Fig Paper Subject Code: 51222 Electronics Devices and Circuits B Draw and explain high frequency model for BJT in CE configuration C Draw and explain a series fed class A power amplifier with the help of neat diagram and waveforms and derive the expression of power efficiency A Design a voltage divider bias circuit to operate at the given conditions Calculate the stability factors S(Ico), S(VBE), Refer Fig.6 10 Marks B Determine the input impedance, output impedance, voltage gain and current gain for the given circuit. Refer fig. 7 10 Marks Paper Subject Code: 51222 Electronics Devices and Circuits A Derive the equation of CMRR for the MOS differential pair amplifier. 10 Marks B Write short note on:
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Q1 E-MOSFET as a differential amplifier li) Zener diode as a voltage regulator 5 Marks 5 marks
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