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Anna University
LINEAR INTEGRATED CIRCUITS and Applications (LICA)
Important Questions
Semester
4
EEE
Department
UNIT-I
1. Explain the process
of fabricating Resistor, capacitor, diode & FET.
2. Discuss in detail
about masking
3. Write short notes
on etching
4. Explain in detail
about diffusion process
5. Explain the various
processes involved in the preparation of silicon wafer
6. With a neat sketch
explain epitaxial grouth
7. Explain the various
steps involved in the fabrication of a typical monolithic IC
UNIT -II
1. List out the
characteristic of ideal op amp
2. Discuss the dc
characteristic of an op amp (Input bias current ,Input offset current)
3. Explain the ac
characteristic of an op amp
4. Explain in detail
about the voltage series feedback amplifer
5. Explain in detail
about the operation of voltage shunt feedback amplifier
6. Explain the
operation of differential amplifier using op amp.
7. Explain the
frequency compensation techniques in detail.
8. Draw the circuit of
integrator and explain. Derive the expression for output voltage
9. Draw the circuit of
summing amplifier using op-amp and explain
10. Draw the circuit
of differential and explain. Derive the expression for output voltage
UNIT-III
1. Explain the
operation of Instrumentation amplifier
2. Write short notes
on clamper using op-amp
3. With the help of op-amp how V/I conversion made and vice versa
4. Explain the
operation of positive & negative clipper circuit
5. Draw the sample and
hold circuit using op-amp and explain its function
6. Explain the working
of regenerative compactor or Sch-mitt trigger
7. Explain the
applications of compactor
8. Draw and explain
the operation of a triangular wave generator and derive an expression for its
frequency of oscillation.
9. Draw the circuit of as-table multi-vibrator and explain. Also derive the expressions for the
expression the total time period ( using op-amp)
10. Draw the circuit
of mono-stable multi-vibrator and explain. Also derive the expressions for the
expression the total time period ( using op-amp)
11. Explain the working
of a saw tooth waveform generator. Explain the methods to obtain asymmetric
square wave. (5 Marks)
12. With neat
sketches, explain the response of I order active Low Pass Filter.
Derive an expression
for the critical frequency. (5 Marks)
13. With neat sketches,
explain the response of II order active Low Pass Filter.
Derive an expression
for the critical frequency.
14. With neat
sketches, explain the response of I order High Pass Filter. Derive an
expression for the critical frequency. (5 Marks)
15. With neat
sketches, explain the response of II order High Pass Filter. Derive an
expression for the critical frequency.
16. What output
voltage would be produced by a DAC whose output range is 0 to 10
V and whose input
binary number is 1011 1101 (for a 8 bit DAC)
17. With a neat
sketch, explain the operation of R-2R ladder DAC.
18. With a neat
sketch, explain the operation of weighted resistor DAC.
19. With a neat
sketch, explain flash type ADC.
20. With a neat
sketch, explain Dual slope type ADC.
21. With a neat
sketch, explain successive approximation ADC.
UNIT-IV
1. Explain the
operation of 555 timer IC in mono-stable mode. And explain any one application
in this mode
2. Draw & explain
the functional diagram of 555 timers.
3. With neat sketches
of circuit diagram and wave-forms, explain the operation of
555 Timer wired as an as-table multi-vibrator.
4. Discuss any 2
applications of as-table multi-vibrator using 555 Timer in detail.
5. Discuss any 2
applications of mono-stable multi-vibrator using 555 Timer in detail.
6. Draw the basic
block schematic of PLL IC & explain. And define the terms lock- in-range,
capture range & pull – in time.
7. Explain the
operation of VCO with respective block diagram
8. Explain any 2
application of PLL
UNIT-V
1. Draw the functional
diagram for a low voltage regulator using 723 IC & explain.
2. Design an
adjustable voltage regulator ( 3 volts to 28 volts) with a short circuit limit
of 60mA using a 723 regulator
3. Explain the working
of LM 317 IC.
4. Discuss about the
operation of MA 7840 IC
5. Draw the functional
diagram of ICL 8038 function generator IC
6. Draw the schematic
diagram of LM 380 power amplifier and explain. And explain its application as
an audio power amplifier
7. Explain about the
operation of Isolation amplifier
8. Write short notes
on opto coupler & opto electronic IC
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