AU Solved Paper - set 7

AU Solved Paper [50475]

December-2017

Linear Integrated Circuits and Applications

Semester - III (EEE)

Regulation 2013 

 

Time : Three Hours]     [Maximum Marks : 100

Answer ALL questions.

PART A - (10 × 2 = 20 Marks)

 

Q.1 State the limitations of IC technology.

(Refer Two Marks Q.2 of Chapter - 1)

Q.2 Distinguish between dry etching and wet etching.

(Refer Two Marks Q.62 of Chapter - 1)

Q.3 A 100 pF capacitor has maximum charging current of 100 micro-ampere. Calculate its slew rate.

(Refer Two Marks Q.76 of Chapter - 2)

Q.4 What is the drawback of IC 741 ?

(Refer Two Marks Q.82 of Chapter - 2)

Q.5 What is the use of sample and hold circuit ?

(Refer Two Marks Q.72 of Chapter-3)

Q.6    Write any two applications of clipper and clamper.

(Refer Two Marks Q.125 of Chapter - 3)

Q.7 Define PULL time of PLL.

(Refer Two Marks Q.42 of Chapter-4)

Q.8 Where is the analog multiplier circuit used 1

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

Q.9 What is an isolation amplifier 1

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

Q.10  List the characteristics of opto coupler.

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

 

 

PART B - (5 × 13 = 65 Marks)

Q.11 a) Explain the basic process used in silicon planar technology with neat diagram.

(Refer section 1.14) [13]

OR

b) Write a note on classification of IC and IC packages.

(Refer sections 1.2 and 1.13)  [13]

Q.12 a) Explain the following terms in an OP-AMP :

i) Bias current (Refer section 2.11)   [3]

ii) Thermal drift (Refer section 2.14.1)       [3]

iii) Input offset voltage and current (Refer section 2.11) [4]

iv) Virtual ground (Refer section 2.20.2)    [3]

OR

b) Draw the circuit of a symmetrical emitter coupled differential amplifier and derive for CMRR.

(Refer section 2.8)         [13]

Q.13 a) With neat diagram, explain the working principle of

i) R-2R ladder type DAC (Refer section 3.25.2.3)          [7]

ii) Weighted resistor DAC (Refer section 3.25.2.1)        [6]

OR

b) Draw and explain the circuit of a second order Butterworth low pass filter and derive its transfer function.

(Refer section 3.7)         [13]

Q.14 a) i)Briefly explain the difference between the two operating modes of 555 Timer.

(Refer sections 4.1.2 and 4.1.3)       [7]

ii) List the important feature of 555 Timer. (Refer section 4.1.6)        [6]

OR

b) Write a note on :

i) Analog multipliers (Refer section 4.6)      [8 + 5]

ii) VCO (Refer section 4.2)

Q.15 a) Briefly explain the working principle of switch mode power supply with necessary circuit diagrams and waveforms.

(Refer section 5.12)       [13]

OR

b) Write short notes on :

i) LM 380 Power Audio Amplifier (Refer section 5.14)  [6]

ii) JCL 8038 Function generator IC. (Refer section 5.15)       [7]

 

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) Explain in detail the recent fabrication methods of diode and capacitance for industrial applications. (Refer section 1.15)       [15]