AU Solved Paper - set 3

AU Solved Paper

December-2015

Linear Integrated Circuits and Applications

Semester - III (EEE) 

 

Time : Three Hours]      [Maximum Marks : 100

Answer ALL questions.

PART A - (10 × 2 = 20 Marks)

 

Q.1 Classify ICs on the basis of application, device used and chip complexity.

(Refer Two Marks Q.3 of Chapter-1)

Q.2 Mention different available IC package configurations.

(Refer Two Marks Q.45 of Chapter-1)

Q.3 What are the ideal characteristics of an OP-AMP ?

(Refer Two Marks Q.9 of Chapter-2)

Q.4 In circuit shown in below figure, calculate V_o, A_CL load current i_L and output current I_o.

(Refer Two Marks Q.119 of Chapter-3)

 

Q.5 Draw the circuit of a log amplifier using two op-amps.

(Refer Two Marks Q.120 of Chapter-3)

Q.6 Calculate the value of the LSB, MSB and full scale output for an 8-bit DAC for the 0 to 12 V range.

(Refer Two Marks Q.112 of Chapter-3)

Q.7 In the monostable multivibrator of below figure circuit R x -100 kO and the time delay T - 100 ms. Calculate the value ofC r

(Refer Two Marks Q.59 of Chapter-4)

Q.8 Define capture range and Lock-in range.

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

Q.9 Define line regulation and load regulation

(Refer Two Marks Q.14, 15 of Chapter-5)

Q.10 What is the purpose of using an external pass transistor with an IC voltage regulator.

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

 

PART B - (5 × 16 = 80 Marks)

Q.11 a) i)  Explain the various steps involved in fabrication of a typical transistor into monolithic ICs.

(Refer section 1.15)       [16]

OR

b) What is thin and thick film technology ? Explain various methods used for deposition of thin film technology.

(Refer section 1.14)       [16]

Q.12 a) i) What is Slew rate ? List the causes of the slew rate and explain its significance in applications.

(Refer example 2.13.2) [10]

ii) Briefly explain the methods used for frequency compensation.

(Refer section 2.33) [6] 

OR

b) i) Draw and explain the operation of a current to voltage converter.

(Refer section 2.26)       [8]

ii) What are the limitations of an ordinary op-amp differentiator ? Draw the circuit of a practical differentiator that will eliminate these limitations.

(Refer section 2.30.3 and 2.30.4)     [8]

Q.13 a) i) Design a second order butterworth low pass filter having upper cut-off frequency of 1 kHz.

(Refer example 3.7.1)   [12]

ii) Explain how to measure the phase differene between two signals.

(Refer sections 4.6.2.5)  [4]

OR   

b) i) Draw a sample and hold circuit and explain its operation.       

(Refer section 3.24) [8]

ii) Design a circuit of a clipper which will clip the input signal below a reference voltage.

(Refer section 3.21.2)    [8]

Q.14 a) i) Draw the explain the functional diagram of 555 timer.

(Refer section 4.1.1)      [10]

ii) Discuss the operation of a FSK generator using 555 timer.

(Refer section 4.1.3.4)   [6]

OR   

b) Draw the block diagram of a VCO and explain its operation.

(Refer section 4.2.1)      [16]

Q.15 a) i) Draw and explain the functional diagram of 723 IC regulator.

(Refer sections 5.7.2)     [8]

ii) Explain fold back characteristic of 723 1C regulator.

(Refer sections 5.8.3)     [8]

OR   

b) i) Draw the circuit diagram of a LM 380 power audio amplifier and explain its operation.

(Refer section 5.14.3)    [12]

ii) What are the applications of LM 380 power amplifier 1

(Refer section 5.14.4)    [4]