AU Solved Paper - set 8

AU Solved Paper [40993]

May-2018

Linear Integrated Circuits and Applications

Semester - III (EEE)

Regulation 2013 

 

Time : Three Hours]     [Maximum Marks : 100

Answer ALL questions.

PART A - (10 x 2 = 20 Marks)

 

Q.1 Define the term photolithography in IC fabrication.

(Refer Two Marks Q.28 of Chapter - 1)

Q.2 The slew rate of an op-amp is 0.6 V/micro sec. What is the maximum undistorted sine-wave that can be obtained for a 10 V peak and 1 V peak ?

(Refer Two Marks Q.83 of Chapter - 2)

Q.3 Compare the ideal and practical op-amp characteristics.

(Refer Two Marks Q.18 of Chapter - 2)

Q.4 How an op-amp can be used as a voltage follower ?

(Refer Two Marks Q.48 of Chapter - 2)

Q.5 Draw the diagram of a sample and hold circuit.

(Refer Two Marks Q.73 of Chapter - 3)

Q.6 Enlist the applications of comparators.

(Refer Two Marks Q.34 of Chapter - 3)

Q.7    Define the terms lock range and capture range with respect to PLL.

(Refer Two Marks Q.38 and Q.39 of Chapter - 4)

Q.8 Mention the applications of analog multipliers.

(Refer Two Marks Q.26 of Chapter - 4)

Q.9 What is an isolation amplifier ?

(Refer Two Marks Q.47 of Chapter - 5)

Q.10  List the features of opto - coupler ICs.

(Refer Two Marks Q.48 of Chapter - 5)

 

PART B - (5 × 13 = 65 Marks)

Q.11 a) Describe the steps involved in the fabrication of monolithic IC transistors.

(Refer section 1.15)       [13]

b) Elaborate the fabrication of MOS ICs with suitable diagram.

(Refer section 1.14)       [13]

Q.12 a) i) Explain the working principle of emitter coupled differential amplifier.

(Refer section 2.5)         [7]

ii) How common mode rejection ratio can be increased using constant current source ?

(Refer section 2.8.6)      [6]

OR

b) i) Draw the inverting amplifier circuit of an op-amp in closed loop configuration. Obtain the expression for the closed loop gain.

 (Refer section 2.21) [7]

ii) For a non-inverting amplifier using an op-amp assume R1 = 470 ohm and R2 = 4.7 kohm. Calculate the closed loop voltage gain of the amplifier.

(Refer example 2.22.2) [6]

Q.13 a) i)Design a weinbridge oscillator for a frequency of 5 kHz. Assume C - 0.01 micro farad.

(Refer example 3.18.1) [4]

ii) Explain the operation of a triangular waveform generator using op-amp.

(Refer section 3.20)       [9]

OR

b) i) Discuss the operation of successive approximation type A/D converter.

(Refer section 3.26.2.2) [11]

ii) What are the advantages of continuous type A/D converter over counter type A/D converter ?

 (Refer section 3.26.2.5)          [2]

Q.14 a) i) Explain the functional block diagram of NE565 phase locked loop.

(Refer section 4.4.1)       [7]

ii) Narrate the process of FSK demodulation using PLL.

(Refer section 4.5.4)      [6]

OR

b) Describe the working principle of the variable trans-conductance analog multiplier.

(Refer section 4.7.3)      [13]

Q.15 a) i) Explain the working principle of basic linear voltage regulator using op-amp.

(Refer section 5.5)         [7]

ii) Explain the operation of a monolithic IC Class - A audio power amplifier LM380.

(Refer section 5.14)        [6]

OR

b) Write a detailed note on switching regulators. (Refer section 5.12)          [13]

 

PART C - (1 × 15 = 15 Marks)

Q.16 a) What are the new trends in integrated circuit technologies and explain about its scope for future generation ? (Refer section 1.14) [15]

OR

b) Write a note on recent fabrication methods of diode and capacitance for industrial applications.

(Refer section 1.15)       [15]