Engineering BE Electronics and Telecommunication Sem 4 December 2018 2018 Linear Integrated Circuits Question Paper - Mumbai University | munotes

Questions asked in this paper

• (3) Figures to the right indicate full marks
• (4) Assume suitable data if necessary and mention the same in answer sheet

1. Q1 Attempt any 4 questions:
   • (a) With neat circuit explain the working of comparator circuit. 5
   • (b) Write short note on: Bi FET and Bi MOS differential amplifier circuit. 5
   • (c) Design a circuit with Op Amp, resistors and a capacitor that simulates an 5
   • (d) For a regulated dc power supply the output voltage varies from 12 Vto when the load current is varied from 0 to 100 mA which is the maximum value of IL. If the ac line voltage and temperature are constant, calculate the load regulation, % load regulation and output resistance of the power supply
   • (e) How can the true RMS value of voltage signal to measured using analog 5
   • (a) Design an adjustable output voltage regulator circuits using IC 317 to to 12 volts at L=1 Amp. Given; wA and let
   • (b) Explain the operation of single slope integrating ADC and state its advantages,
2. Q3 (a) Draw aneat circuit diagram of a RC phase shift oscillator using op-amp. Derive its frequency of oscillation. What are the values of R and C for frequency of oscillation to be 1 kHz?
   • (b) Explain the working principle of successive approximation type ADC. 10
3. Q4 (a). With the help of a neat diagram, input and output waveforms and voltage transfer characteristics explain the working of non-inverting Schmitt trigger. Derive the expressions for its threshold levels.Explain how these levels can be varied?
   • (b) Design a differentiator to differentiate an input signal that varies in frequency from 10 Hz to about 500 Hz. Draw its frequency response. If a sine wave of 2 V peak at 500 Hz is applied to the differentiator, write expression for its output and
   • (a) Draw the circuit diagram of a square and triangular waveform generator using amp. With the help of waveforms at suitable points in the circuit explain its working. Explain how duty cycle can be varied?
   • (b) Analyze the circuit given in Fig. 5(b). Draw the waveforms at output terminal vo — and across the capacitor C. Comment on the duty cycle of output waveform. Take diode D as an ideal diode and assume Ra is equal to 10
4. Q6 Short notes on: (Attempt any four)

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