Jawaharlal Nehru Technological University Kakinada 2007 B.Tech Electronics and Communications Engineering LINEAR IC APPLICATIONS - Question Paper

from 10 Hz to about 1KHz. If a sine wave of 1V peak at 1000 Hz is applied
to this differentiator draw the output waveforms.
(b) Why active differentiator circuits are not used in analog computer to solve
differential equations. [10+6]
4. (a) Derive the expression of the output voltage of an antilog amplifier using op -
amp.
(b) Design a saw tooth wave form generator using op - amp and plot the waveforms
for the provided specifications frequency: 5kHz, Vsat = ± 15V (Assume necessary
data). [8+8]
5. (a) For the all pass filter, determine the phase shift f ranging from the input and output
at f = 2kHz. To find a phase shift f , what changes are necessary in
the circuit?
(b) Derive the expression for the transfer function of second order High pass filter.
[8+8]
6. (a) discuss the operation of Monostable multivibrator using 555 timer. Derive
the expression of time delay of a Monostable multivibrator using 555 timer.
(b) Design monostable multivibrator using 555 timer to produce a pulse width of
100 m sec. [10+6]
7. (a) elaborate the basic blocks preceding an Analog to Digital converter in a typical
application like digital audio recording?
(b) With the help of a neat circuit diagram and waveforms, discuss the operation
of a dual slope ADC. elaborate its special features? [6+10]
8. Write short notes on:
1 of 2
Code No: R05310401 Set No. 3
(a) IC 1496 and its applications
(b) Sample and hold circuit. [16]
? ? ? ? ?
2 of 2
Code No: R05310401 Set No. 4
III B.Tech I Semester Regular Examinations, November 2007
LINEAR IC APPLICATIONS
(Electronics & Communication Engineering)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks
? ? ? ? ?
1. (a) explain the differences ranging from the differential amplifiers used in the 1st two
stages of op - amp.
(b) Compare and contrast an ideal op - amp and practical op - amp.
(c) Draw an ideal voltage transfer curve of an op - amp. [8+5+3]
2. (a) elaborate the 3 factors that effect the electrical parameters of an op - amp
(b) Compare and contrast an ideal op - amp and practical op - amp.
(c) elaborate the features of 741 op - amp and also draw the pin diagram.[3+6+7]
3. (a) Draw the circuit diagram of a 2 input non-inverting kind summing amplifier
and derive the expression for the output voltage.
(b) Briefly discuss why negative feedback is desirable in amplifier applications.
(c) How does negative feedback affect the performance of an inverting amplifier?
[7+5+4]
4. (a) Derive the expression of the output voltage of an antilog amplifier using op -
amp.
(b) Design a saw tooth wave form generator using op - amp and plot the waveforms
for the provided specifications frequency: 5kHz, Vsat = ± 15V (Assume necessary
data). [8+8]
5. (a) List the conditions for oscillation in all the 3 kinds of oscillators, namely,
RC phase shift, Wien - bridge and quadrature oscillators.
(b) Design an op ? amp based relaxation oscillator and derive the frequency of
oscillation. [8+8]
6. (a) Draw the circuit of PLL as frequency multiplier and discuss its working.
(b) discuss with neat diagram how 555 timers can be used as a Schmitt trigger.
[8+8]
7. (a) Sketch and discuss the transfer characteristic of a DAC with necessary equa-
tions.
(b) LSB of a nine - bit DAC is represented by 19.6mv. If an input of nine zero bits is
represented by 0 volts.
i. obtain the output of the DAC for an input 10110 1101 and 01101 1011.
ii. What is the Full scale studying (FSR) of this DAC? [8+8]
1 of 2
Code No: R05310401 Set No. 4
8. (a) define the operation of 4 quadrant multiplier with neat diagram.
(b) discuss the operation of IC 1496 as mixer circuit. [8+8]
? ? ? ? ?
2 of 2

Earning:   Approval pending.