GTU Integrated Circuit And Application - December 2014 Exam Question Paper

GTU Electronics and Communication Engineering (Semester 5)
Integrated Circuit And Application
December 2014

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

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 (K_m of 10,000 to get partical values for the components.

7 M

1 (b) Draw Sallen and Key low-pass filter circuit and obtain its transfer function.

7 M

2 (a) Determine the output voltage in each of the following case for the open-loop differential amplifier constructed using 741 with V_{in 1}applied at non-inverting terminal and V_{in 2} at inverting terminal.
a. V_in1 = 5 μV dc, V_in2 = -7 μV dc
b. V_in1 = 10 mV rms, V_in2 = 20 mV rms

7 M

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.

7 M

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 (R_F ) 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 V_in = 10 mV.

7 M

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.

7 M

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.

7 M

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.

7 M

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.

7 M

4 (a) Discuss op-amp based triangular wave generator circuit. Obtain expression for frequency of oscillation for the same.

7 M

4 (b) Describe operation of op-amp based peak detector circuit with essential Diagrams.

7 M

4 (c) What are the different important parameters of comparator circuit? Describe operation of op-amp based voltage limiter circuit with suitable diagrams.

7 M

4 (d) What do you understand by precision rectifier circuit? Illustrate op-amp based full-wave rectifier circuit with its complete functionality.

7 M

5 (a) Describe application of 555 timer as an astable multivibrator circuit. Obtain expressions for frequency of operation and duty cycle.

7 M

5 (b) List the different types of voltage regulators. Describe the operation of basic switching regulator.

7 M

5 (c) Draw block diagram of basic PLL and explain operation of each of the blocks.

7 M

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.

7 M

More question papers from Integrated Circuit And Application

SPONSORED ADVERTISEMENTS