JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III IC APPLICATIONS Previous Question Paper (August/September - 2024 - R13)
Note: i) Question paper consists of Part A, Part B.
ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions.
iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Why inductors are difficult to fabricate as an ICs?
Answer
Inductors are difficult to fabricate on an IC because they require large surface areas for high inductance values and suffer from low quality factors (Q) due to the high series resistance of thin-film metal traces. Furthermore, they cannot be easily integrated using standard planar semiconductor manufacturing processes.
Classify the ICs based on the application, device and chip complexity.
Answer
ICs are classified as follows:
- Application: Linear (Analog) ICs and Digital ICs.
- Device: Monolithic ICs and Hybrid (Thin/Thick film) ICs.
- Chip Complexity: Small Scale Integration (SSI), Medium Scale Integration (MSI), Large Scale Integration (LSI), Very Large Scale Integration (VLSI), and Ultra Large Scale Integration (ULSI).
List the characteristics of ideal op-amp.
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How input offset voltage is compensated?
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What are the advantages of active filters?
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State two conditions of oscillator and why these are needed?
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Define lock range in PLL.
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What is VCO? With reference to this, define voltage to frequency conversion factor.
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Which one is fastest ADC? State the reason.
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What output would be produced by a 2-bit D/A converter whose output range is 0 to 10V and whose input binary number is 10.
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Part B
What is the advantage of open collector output in TTL and explain the working of standard TTL NAND gate functionality with neat circuit diagram.
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How TTL gate drive the CMOS gate?
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What is tristate TTL? Explain its working with neat diagrams.
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Explain the general stages of op-amp with neat block diagram.
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Explain the terms CMRR and slew rate of op-amp.
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Draw and explain the circuit of voltage to current converter.
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What are the different features of 741 op amp?
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Design a second order active low pass filter and derive the equation for its transfer function and also draw its frequency response.
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Design a wien bridge oscillator using op-amp, to oscillate at 100Hz and draw its circuit diagram.
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Draw the pin diagram of 555 timer and write its applications.
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In the Astable multivibrator of 555 timer RA=6.6kΩ, RB=3.3kΩ and C=0.1μF. Calculate tH, tL free running frequency and duty cycle.
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Draw the block diagram of PLL and explain the function of each block.
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Explain Inverted R-2R ladder DAC with suitable circuit diagram and discuss its advantages and disadvantages.
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Explain how dual slope ADC is used to convert analog input to digital output with neat circuit diagram and compare its performance with other ADCs.
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