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GTU Electronics and Communication Engineering (Semester 5)
Integrated Circuit And Application
June 2014
Integrated Circuit And Application
June 2014
1 (a) (i)
Op-amp (741) IC with an open loop gain equal to 2 ×105is used in open loop mode. Supply voltage is + 15V. Find out output voltage if (a) Vid = -20 mV, and (b) Vid = 50 μV. Vid is input differential voltage across positive and negative input terminals of op-amp.
and (d) Output voltage swing.
4 M
1 (a) (ii)
Define following terms for op-amp: (a) CMRR, (b) SVRR, (c) Slew Rate
3 M
1 (b)
Design non-inverting op-amp (741) based amplifier which has feedback
Resistance (RF) equal to 10 kΩ and closed loop gain of 11. For this circuit, calculate RiF,RoF,FF and V∞T (total output offset voltage with feedback).
7 M
2 (a)
Draw two op-amp based differential amplifier and derive expression for its
gain, input and output resistances, and bandwidth.
7 M
2 (b)
Discuss design steps for input offset voltage compensating network.
7 M
2 (c)
For an inverting amplifier with a gain equal to -100 and feedback resistance of
47 kΩ, determine maximum possible output offset voltage due to (1) input
offset voltage of 6 mV, and (2) Input bias current of 500 nA. What value of
R OM is needed to reduce offset voltage effect due to the effect of input bias
current?
7 M
3 (a)
Draw schematic of single supply based op-amp AC inverting amplifier.
Explain its working along with necessary input and output waveforms.
7 M
3 (b)
Design a practical op-amp based integrator such that peak gain is 20 dB and
the gain is 3 dB down from its peak value at w equal to 10,000 rad/s. Use
capacitance of 0.01 μF
7 M
3 (c)
Describe the operation of differential instrumentation amplifier which uses
resistive transducer in a bridge circuit. Show that the output voltage is
directly proportional to the change in resistance value of a transducer.
7 M
3 (d)
Draw and explain working of basic differentiator circuit. What are the
limitations of this circuit? How it can be corrected?
7 M
4 (a)
Explain working of op-amp based Schmitt trigger circuit along with
schematic and input/output waveforms.
7 M
4 (b)
Illustrate operation of op-amp based triangular wave generator circuit with
necessary waveforms as well as mathematical steps.
7 M
4 (c)
Draw op-amp based full wave rectifier (absolute-value) circuit. Explain its
working with necessary input/output waveforms.
7 M
4 (d)
Discuss operation of op-amp based saw-tooth wave generator circuit with
relevant diagram and waveforms.
7 M
5 (a)
Describe operation of each block of phase locked loop. List out PLL
Applications.
7 M
5 (b)
Draw Sallen-key low-pass filter circuit and obtain its transfer function.
7 M
5 (c)
Draw 555 timer block diagram. Explain its working and its use as a
monostable multivibrator.
7 M
5 (d)
Sketch Delyiannis-Friend circuit and obtain its transfer function.
7 M
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