University Questions with Answers (Long Answered Questions)

University Questions with Answers

(Long Answered Questions)

(Regulation 2008)

Dec.-11

Q.1 Draw the functional diagram of astable multivibrator using IC 555 timer and explain its operation and derive the expression for the frequency. [Section 4.1] [16] 

Q.2 Explain the bistable operation of IC 555 with necessary waveforms. [Section 4.1]

Q.3 Show that the lock-in range of a PLL is given by Δf_L = ± 7.8 f_o / V where the symbols used have the usual meaning. [Section 4.4] [8]

Q.4 What is PLL ? Explain its application as a frequency multiplier. [Section 4.5] [8]

May-12

Q.5 Perform the closed loop analysis of PLL. [Section 4.3]     [8]

Q.6 Explain AM demodulation using PLL. [Section 4.5]         [8]

Q.7 Explain the applications of PLL as frequency translator and FM demodulator. [Section 4.5]          [8]

Dec.-12

Q.8 Draw the functional diagram of astable multivibrator using IC 555 timer and explain its operation and derive the expression for the frequency. [Section 4.1] [16]

Q.9 Explain the applications of PLL as frequency translator and FM demodulator. [Section 4.5] [8]

Q.10 What is PLL ? Explain its application as a frequency multiplier. [Section 4.5] [8]

Q.11 Explain, with necessary equations, the basic circuits of 'Linearized transconductance multiplier' and differential V-I converter' Hence explain the 'Four quadrant variable transconductance multiplier' circuit. [Section 4.9] [10]

May-13

Q.12 Explain the operation of square wave generator using IC 555 by drawing capacitor and output voltage waveforms. [Section 4.1]      [16]

May-14

Q.13 With the help of schematic circuit explain the operation of 566 voltage controlled oscillator. State the expression for the output frequency. Discuss any two applications. [Section 4.2]   [16]

(Regulation 2013)

Dec.-14

Q.14 Explain, with necessary equations, the basic circuits of 'Linearized transconductance multiplier' and differential V-I converter' Hence explain the 'Four quadrant variable transconductance multiplier' circuit. [Section 4.9] [10]

May-15

Q.15 With the help of neat internal function diagram explain the working cf IC 555 as a astable multivibrator. [Section 4.1]      [8]

Q.16  Explain the working of voltage controlled oscillator. [Section 4.2]    [6]

Q.17  Explain how frequency multiplication is done using PLL. [Section 4.5] [8]

Dec.-15

Q.18  Draw and explain the functional diagram of IC 555 timer. [Section 4.1] [8]

Q.19  Discuss the operation of FSK generator using 555 timer. [Section 4.1]       [6]

Q.20  Draw the block diagram of VCO and explain its operation. [Section 4.2] [8]

Q.21  Explain how to measure the phase difference between two signals. [Section 4.8]  [4]

May-16

Q.22 With the help of schematic diagram, explain the operation of IC-566 VCO. Also derive an expression for the output frequency. [Section 4.2] [16]

Q.23 Explain the operation of astable operation of IC 555 with necessary waveform. [Section 4.1.3]          [10]

Dec.-16

Q.24 With the help of schematic diagram, explain the operation of IC 566 VCO and derive its output frequency. [Section 4.2]          [13]

Q.25 What is PLL ? How frequency multiplication is done in PLL ? [Sections 4.3 and 4.5.1]          [13]

May-17

Q.26 Briefly explain the functional block diagram of NE565 PLL-IC to operate as a frequency divider. [Sections 4.4, 4.5.1 and 4.5.2]       [13]

Q.27 Explain the functional block diagram of 555 timer IC. [Section 4.1.1]         [8]

Q.28 Design a monostable multivibrator with pulse duration of 1 msec using 555 timer IC. [Example 4.1.2]    [5]

Dec.-17

Q.29 Briefly explain the difference between the two operating modes of 555 timer. [Sections 4.1.2 and 4.1.3]   [7]

Q.30 List the important feature of 555 timer. [Section 4.1.6]   [6] 

Q.31  Write a note on : i) Analog multipliers [Section 4.6] ii) VCO [Section 4.2] 18+5]

May-18     

Q.32  Narrate the process of FSK demodulation using PLL. [Section 4.5.4]         16]

Q.33  Describe the working principle of the variable trans-conductance analog multiplier. [Section 4.7.3]      [13]

Note  All the examples asked in the previous university papers are solved and included in the chapter.