Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III IC APPLICATIONS Previous Question Paper (May/June - 2019 - R13)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
Define Integrated circuit.
Answer
An Integrated Circuit (IC) is a small semiconductor wafer, typically made of silicon, on which thousands or millions of electronic components such as transistors, resistors, and capacitors are fabricated and interconnected to perform a specific electronic function.
What is propagation Delay in a gate?
Answer
Propagation delay is the time interval between the application of an input signal and the resulting change in the output signal of a logic gate. It is typically measured between the 50% points of the input and output voltage transitions.
Define Supply voltage rejection ratio in Op-Amp.
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What is Slew rate of Op-Amp?
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What is Cutoff frequency in low pass filter?
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Write about the pass band and transition band in filters.
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What is Quasi stable state in 555 timer?
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What is Lockin Frequency in PLL?
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Define Conversion Time of DAC.
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What is meant by resolution in ADC?
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Part B
What is meant by Tri-static logic? Draw the circuit of Tri-state TTL logic and explain its functions.
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Compare the TTL and CMOS logic families.
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Explain sinking current and sourcing current of TTL output. Which of the above parameters decide the fan-out and how?
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With a neat diagram explain about the TTL NAND gate.
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Design an op-amp differentiator to differentiate an input signal that varies in frequency from 10Hz to about 1 KHz.
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Draw the general block diagram of 741 and explain.
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What are the disadvantages of using zero crossing detector? How it can be overcome using Schmitt trigger?
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Draw and Explain the response curve of practical Op-amp based Integrator.
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An ideal low pass filter having fH=5 kHz is cascaded with high pass filter having fL=4.8 kHz. Sketch the frequency response of the cascaded filter.
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Design a first order active high pass filter with cutoff frequency of 2KHz with op-amp. Why this is called Active filter?
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Design a Triangular wave generator with f0= 1.5 KHz and V0 (P-P) = 5V.
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List out the merits and demerits of active filters over passive filters.
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Explain the monostable operation of the 555 timer.
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Derive the expression for the period of a pulse generated by the Timer in the above case.
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Draw the block diagram for PLL and explain in detail.
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Explain two of the following applications for which PLL is used: i) AM detector ii) FM demodulator
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Draw a schematic diagram of a D/A converter. Use resistance values whose ratios are multiples of 2. Explain the operation of the converter.
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Give the schematic circuit of integrating type A/D converter and explain the operation of this system and derive expression for output voltage Vo.
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With neat block diagram, explain successive approximation type A/D converter in detail.
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Explain the operation of a weighted resistor type DAC.
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