JNTU
JNTU B.Tech III ANALOG AND DIGITAL IC APPLICATIONS Previous Question Paper (November/December - 2018 - R16)
Note: This question paper contains two parts A and B. 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
List the classification of IC.
Answer
Integrated circuits are primarily classified based on the manufacturing process as Monolithic ICs, Thin-film ICs, Thick-film ICs, and Hybrid ICs. Based on the level of integration, they are classified as SSI (Small Scale Integration), MSI (Medium Scale Integration), LSI (Large Scale Integration), VLSI (Very Large Scale Integration), and ULSI (Ultra Large Scale Integration).
Draw ideal op amp and equivalent circuit and also give its output voltage.
Answer
An ideal op-amp is represented as a voltage-controlled voltage source with infinite input impedance, zero output impedance, and infinite open-loop gain. The equivalent circuit shows two input terminals (inverting and non-inverting) and a dependent voltage source at the output. The output voltage is given by:
where AOL is the open-loop gain, V+ is the non-inverting input voltage, and V- is the inverting input voltage.
Write the significance of upper and lower threshold voltages in Schmitt trigger circuit.
Answer
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Describe the operation of wein bridge oscillator.
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Define capture range and pull in time of PLL.
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The basic step of a 9 bit DAC is 10.3mv. If 000000000 represents 0v. What output is produced if the input is 101101111?
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Draw a standard TTL NAND gate logic diagram.
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Mention the applications of decoder and demultiplexers.
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Design a 3-bit synchronous counter using JK flip-flop.
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Explain the differences between SRAM and DRAM.
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Part B
Derive the voltage gain of non inverting amplifier.
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Derive common mode and difference mode gain of differential amplifier.
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Derive the output voltage Vo of instrumentation amplifier.
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Explain the application of op amp as Multiplier.
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Explain Astable multivibrator for square wave generation.
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Describe the operation of VCO.
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Design a second order Butterworth high pass filter with a lower cut off frequency of 1 KHz.
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Illustrate the process of triangular wave generation.
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Explain the operation of PLL system.
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Define Duty cycle.
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Explain R-2R ladder DAC process in detail.
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What output voltage would be produced by a DAC whose output voltage is 0 to 10 v and whose input binary number is i) 10 (for 2- bit DAC) ii) 0110(for a 4-bit DAC) iii) 10111100 (for a 8- bit DAC)
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Explain CMOS transmission gate.
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When a TTL NAND gate drives five inputs, find total source current and total sink current?
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Design a 8- input multiplexer and explain the process.
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Explain 4-bit magnitude comparator.
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Design a 4- bit serial in serial out shift register.
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Design a 4 bit BCD decade counter.
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Explain internal ROM organization.
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List the classification of ROM.
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