AU Solved Paper - set 2

AU Solved Paper

May-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 What is ion implantation ? Give its advantages.

(Refer Two Marks Q.36 of Chapter-1)

Q.2 List the advantages of integrated circuits over discrete component circuit.

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

Q.3 What do you mean by input offset current and offset voltage.

(Refer Two Marks Q.ll, 12 of Chapter-2)

Q.4 Define CMRR.

(Refer Two Marks Q.67 of Chapter-2)

Q.5 What is a zero crossing detector ?

(Refer Two Marks Q.16 of Chapter-3)

Q.6 Calculate the number of comparators required for realizing an 8-bit flash A/D converter.

(Refer Two Marks Q.121 of Chapter-3)

Q.7 Define duty cycle in astable multivibrator using IC 555.

(Refer Two Marks Q.13 of Chapter-4)

Q.8 List the applications of PLL.

(Refer Two Marks Q.47 of Chapter-4)

Q.9 What are the limitations of the three terminal regulator ?

(Refer Two Marks Q.37 of Chapter-5)

Q.10 How current boosting is achived in a 723 IC ?

(Refer Two Marks Q.2 of Chapter-5)

 

PART B - (5 × 16 = 80 Marks)

a) i) Describe the Epitaxial growth process.

(Refer section 1.6)         [8]

ii) Explain the different types of IC packages.

(Refer section 1.13)       [6]

OR

b) Briefly explain the various process involved in fabrication monolithic IC which integrates diode capacitance and FET. (Refer section 1.15)  [16]

Q.12 a) i) Design an op-amp circuit to give an output voltage

V_o = 4V₁ - 3V₂ + 5V₃ - V₄ where V₁, V₂, V₃ and V₄ are inputs.

(Refer example 2.28.1) [8]

ii) Explain voltage to current converter using operational amplifier. Also explain the application of OP-Amp as integrator.

(Refer sections 2.25 and 2.29) [8]

OR

b) i) Explain in detail about the methods of frequency compensation used in operational amplifiers.

(Refer section 2.33)       [10]

ii) What is slew rate and how it can be improved ?

(Refer example 2.13.2) [6]

Q.13 a) i) Discuss the second order high pass filter with its frequency response and design the circuit with the cut off frequency of 5 kHz.

(Refer section 3.9 and Example 3.9.1)      [8]

ii) With a neat circuit diagram, explain the working of Schmitt trigger using op-amp.

 (Refer section 3.28)      [8]

OR

b) i) Explain the working of instrumentation amplifier.

(Refer section 3.1.2)      [8]

ii) With neat circuit diagram explain the operation of R-2R D/A converter

(Refer section 3.25.2.2) [8]

Q.14 a) i) With the help cf neat internal function diagram explain the working cf IC 555 as a astable multivibrator.

(Refer section 4.1.3)      [10]

ii) In the astable multivibrator using 555 timer, RA = 2.2 kD, R^ = 6.8 kD, and C = 0.01 µF. Calculate t_HIGH, t_LOW' free running  frequency and duty cycle.

(Refer example 4.1.4)   [6]

OR

b) i) Explain the working of a voltage controlled oscillator.

(Refer section 4.2) [8]

ii) Explain how frequency multiplication is done using PLL.

(Refer section 4.5.1)      [8]

Q.15 a) i) Explain the working of series voltage regulator.

(Refer sections 5.5) [8]

ii) Explain the working principle of IC 8038 function generator.

(Refer sections 5.15)      [8]

OR

b) i) What is the principle of switch-mode power supplies ? Discuss its advantages and disadvantages.

(Refer section 5.12)       [8]

ii) With a neat diagram explain the operation of LM 380 power amplifier.

(Refer section 5.14.3)    [8]