Engineering BE Electronics and Telecommunication Sem 4 December 2019 2019 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 the questions
   • a) In the circuit given in Fig. 1(a) if the voltage V+ and V- are to be amplified by the same factor, the value of R should be
   • i) 3.3k 330 Q iv) None of these
   • b) If the input to the ideal comparator shown in Fig. 1(b) is a sinusoidal signal of 8 volt peak to peak without any DC component, then the duty cycle of the output comparator is ‘
2. Q1 33.33% iii) 20% None of these
   • c) What is the frequency of IC 555 astable multivibrator shown in Fig. 1(c)?
   • d) An amplifier using OPAMP with slew rate SR = 1 V/us has a gain of 40 dB. If this amplifier has to amplify sinusoidal signal of 20 kHz faithfully without any slew rate induced distortion, then the input signal must not
3. Q1 mV
4. Q2 a) Sketch the implementation of an instrumentation amplifier using three — opamps and explain its operation 10 marks
   • b) Compare ideal and practical opamp. 5
   • c) Explain current foldback protection in voltage regulators. 5
   • a) Design a Schmitt trigger circuit to convert 5V, 1kHz sinusoidal signal to square wave using 741IC, Vur = 0.8 V, V and V Draw its transfer characteristics, input and output waveforms
   • b) With the help of circuit diagram, derive the expression of output analog voltage for a weighted resistor DAC 10
5. Q4 Design an IC 555 astable multivibrator for an output frequency 1 kHz duty cycle of 60%
   • b) With the help of a functional block diagram explain the working of voltage regulator LM317 to give an output voltage variable from 6 V to 12 V to handle maximum load current of 500 mA
   • a) Design a Wein Bridge oscillator using opamp to oscillate ata frequency of 965 Hz and explain the working of Wein bridge oscillator
   • b) List and explain the various performance parameters of DAC. 10
6. Q6 Short notes on: (Attempt any four) 20 marks
   • a) Comparison of linear and switching regulators
   • c). Precision rectifiers
   • e) current source

Read from the scan above, so a character or two may differ. The scan is the original.