JNTU Kakinada B-Tech 3-1 RT31026 I LINEAR and DIGITAL IC APPLICATIONS R13 April 2018 Question Paper

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Code No: RT31026
III B. Tech I Semester Supplementary Examinations, May -2018
LINEAR & DIGITAL IC APPLICATIONS (Electrical and Electronics Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
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PART ?A
1 a) List the advantages of ICs over discrete components? [3M]
b) Define input offset current and input offset voltage [4M]
c) Give the important features of an instrumentation amplifier. [4M]
d) Define capture range and lock range? [4M]
e) Draw the circuit of first order active filter. [3M]
f) Compare successive approximation ADC with dual slope ADC. [4M]
PART -B
2 a) What is a differential amplifier? Mention the classification of differential amplifier
with neat diagrams.
[8M]
b) Explain ac analysis of dual input balanced output differential amplifier configuration.
[8M]
3 a) What is an operational amplifier? Give its symbol and also draw its electrical
equivalent circuit.
[8M]
b) An op-amp has a slew rate of 2V/?s. What is the maximum frequency of an output
sinusoid of peak value 5V at which the distortion sets in due to the slew rate limitation?
[8M]
4 a) With a neat sketch explain the instrumentation amplifier [8M]
b) Draw the circuit of a voltage to current converter if the load is i) floating and
ii) Grounded. Are there any limitations as the size of the load when grounded?
[8M]
5 a) Draw the block diagram of NE/SE565 PLL and explain the operation with the help of
waveforms.
[8M]
b) What is meant by VCO? Explain in detail and state the applications of VCO? [8M]
6 a) Plot and explain frequency response of
i) Low pass Butter worth filter ii) High pass filter iii) Band pass filter
iv) Band Reject filter
[8M]
b) Design a second order Low Pass Filter at a high cut off frequency of 2 KHz. Draw the
frequency response and the circuit with all components.
[8M]
7 a) Compare different types of A-D converters [8M]
b) Find the voltage at all nodes 0, 1, 2 ? and at the output of a 5-bit R-2R ladder DAC.
The LSB is 1 and all other bits are equal to ?0?. Assume V
R
= -10V and R = 10 kO
[8M]
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R13
SET – 1