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GTU Electronics and Communication Engineering (Semester 5)
Integrated Circuit And Application
December 2014
Integrated Circuit And Application
December 2014
1 (a)
Design a Biquad band-pass filter circuit with a center frequency (ω0)at 1000 rads/s, a banadwidth of 200 rad/s,and maximum gain of 1. Use magnitude scaling factor (Km of 10,000 to get partical values for the components.
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1 (b)
Draw Sallen and Key low-pass filter circuit and obtain its transfer function.
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2 (a)
Determine the output voltage in each of the following case for the open-loop
differential amplifier constructed using 741 with Vin 1applied at non-inverting terminal and Vin 2 at inverting terminal.
a. Vin1 = 5 μV dc, Vin2 = -7 μV dc
b. Vin1 = 10 mV rms, Vin2 = 20 mV rms
a. Vin1 = 5 μV dc, Vin2 = -7 μV dc
b. Vin1 = 10 mV rms, Vin2 = 20 mV rms
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2 (b)
What are the drawbacks of single op-amp based differential amplifier? Draw two
op-amp based differential amplifier circuit and obtain expression for its
differential gain.
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2 (c)
An inverting amplifier is nulled when supply voltage is + 10 V. Assume that negative supply voltage remains constant and positive supply voltage varies between +8 to +12 V. SVRR of op-amp IC is 96 dB. Gain of inverting amplifier is -100 when nulled. Assume feedback resistance (RF ) to be 100 kΩ. Determine (a) the change in the output offset voltage caused by the change in the supply voltage mentioned above, and (b) the total output voltage if Vin = 10 mV.
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3 (a)
What are the different factors which contribute to output offset voltage in op-amp? Explain in detail the approach used to compensate one of these factors.
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3 (b)
Sketch op-amp based basic integrator circuit. Derive expression for output
voltage to justify its operation of integration. What are the problems associated
with this circuit? Suggest possible solution.
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3 (c)
Draw op-amp based peaking amplifier circuit along with its frequency response.
Explain its working. Write expressions for the frequency at which gain peaks as
well as maximum (peak) gain.
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3 (d)
Sketch op-amp based basic differentiator circuit. Derive expression for output
voltage to justify its operation of differentiation. What are the problems
associated with this circuit? Suggest possible solution.
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4 (a)
Discuss op-amp based triangular wave generator circuit. Obtain expression for
frequency of oscillation for the same.
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4 (b)
Describe operation of op-amp based peak detector circuit with essential
Diagrams.
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4 (c)
What are the different important parameters of comparator circuit? Describe
operation of op-amp based voltage limiter circuit with suitable diagrams.
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4 (d)
What do you understand by precision rectifier circuit? Illustrate op-amp based
full-wave rectifier circuit with its complete functionality.
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5 (a)
Describe application of 555 timer as an astable multivibrator circuit. Obtain
expressions for frequency of operation and duty cycle.
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5 (b)
List the different types of voltage regulators. Describe the operation of basic
switching regulator.
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5 (c)
Draw block diagram of basic PLL and explain operation of each of the blocks.
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5 (d)
Enumerate characteristics of ideal op-amp, and describe following parameters of
op-amp: 1. CMRR, 2. SVRR, 3. Slew rate, and 4. Output voltage swing.
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