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Linear Integrated Circuits Question Paper - May 18 - Electronics And Telecomm (Semester 4) - Mumbai University (MU)
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Linear Integrated Circuits - May 18

Electronics And Telecomm (Semester 4)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

Q1 Attempt any 4 Questions:

a) How precision rectifiers are differnt than simple diode rectifiers?
(5 marks) 00

b) Compare ideal op-amp with practical op-amp.
(5 marks) 00

c) Find $v_n$, $v_p$ and $v_o$ in the circuit of Fig. 1(c) if $v_s$ is 9V,
(5 marks) 00

d) Design a circuit for $V_o$ = 2$V_1$ - 3$V_2$ using single op-amp and few resistors.
(5 marks) 00

e) Explain how a resistor can be simulated bu a switch capacitor circuit.
(5 marks) 00

Q2

a) Design a voltage regulator using IC 723 to give $V_o$ = -4V to 32V and output current of 2A.
(10 marks) 00

b) Explain R-2R ladder type digital to analog convertor.
(10 marks) 00

Q3

a) Explain analog to digital conversion using successive approximation method.
(10 marks) 00

b) Draw a neat 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?
(10 marks) 00

Q4

a) What is an instrumentation amplifier? Draw a neat circuit of an instrumentation amplifier using 3 op-amps. Derive its output voltage equation.
(10 marks) 00

b) With the help of a neat diagram and voltage tranfer characteristics explain the working of an inverting schmit trigger. Derive the expressions for its threshold levels.
(10 marks) 00

Q5

a) Draw the circuit diagram of a square and triangular waveform generator using op-amp and explain its working with the help of waveforms
(10 marks) 00

b) Analyze the circuit given in Fig. 5(b). Draw the waveforms an output terminal $v_o$ and across the capacitor C. Comment on the duty cycle of output waveforms. Take diode D as an ideal diode and assume $R_A$ is equal to $R_S$.
(10 marks) 00

Q6 Short notes on: (Attempts any four)

a) Sample and hold circuits.
(5 marks) 00

b) Three terminal fixed voltage regulator
(5 marks) 00

c) Monolithic switching regulator
(5 marks) 00

d) XR2206 waveform generator.
(5 marks) 00

e) Wilson current source
(5 marks) 00

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