PTU B.Tech EE Engineering 5th Semester May 2019 70547 LINEAR INTEGRATED CIRCUITS Question Papers

PTU Punjab Technical University B-Tech May 2019 Question Papers 5th Semester Electrical and Electronics Engineering (EEE)-EE-Electrical Engineering

Roll No.
Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(Electronics Engg.) (2012 Onwards) (Sem.?5)
B.Tech.(ECE)/(Electronics & Computer Engg.)/(ETE)
(2011 Onwards)
LINEAR INTEGRATED CIRCUITS
Subject Code : BTEC-503
M.Code : 70547
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.

SECTION-A
1.
Answer briefly :

a. An operational amplifier has slew rate of 2V/s. If peak output voltage is 12 volts, what

is the bandwidth of operational amplifier?

b. Differentiate between the open and closed frequency response.

c. How the input impedance of an ac voltage follower can be increased significantly?

d. Draw a circuit to find V0 = (V1 + V2) ? (V3 + V4).

e. What is log amplifier? Draw the circuit of basic log amplifier.

f. Why we go for higher order filters.

g. What is VCO?

h. Define resolution of D/A converter.

i. List the applications of 555 timer in monostable mode of operation.

j. What is the working principle of switching regulator?
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SECTION-B
2.
What is level translator circuit? Why is it used with cascaded differential amplifier?
3.
What is the effect of variation in power supply voltages on offset voltage?
4.
How does negative feedback affect the performance of an inverting amplifier?
5.
Draw and explain circuit diagram of voltage-to-current converter. Also explain any two
applications of this converter.
6.
Discuss with circuit diagram operation of square wave generator.

SECTION-C
7.
a. Explain how 555 timer used as Schmitt trigger.

b. Draw and explain circuit diagram of an integrator circuit. Derive an expression for the

output voltage.
8.
What is the operating principle of PLL? Explain its applications.
9.
Write a note on voltage regulators.









NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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