Question Paper: Integrated Circuits Question Paper - May 2016 - Electronics and Telecom Engineering (Semester 5) - Mumbai University (MU)
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## Integrated Circuits - May 2016

### MU Electronics and Telecom Engineering (Semester 5)

Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

### Solve the following (any five)

1(a) Compare open loop & configuration of operational amplifier. 4 marks

1(b) Draw the diagram of a floating load voltage to current converter and derive the expression for the output current. 4 marks

1(c) Differentiate between inverting & non-inverting comparators. 4 marks

1(d) Explain the functional block diagram of timer 555. 4 marks

1(e) Explain current fold-back protection in voltage regulators. 4 marks

1(f) Draw the waveforms for the ouputs of IC 7490 with respect to the clock when it is used as a bi-quinary decade counter. 4 marks

2(a) Draw a neat diagram for an instrumentation amplifier using three op-amp & derive the expression for its gain. Explain how the gain can be varied. 4 marks

2(b) Draw a neat diagram of a Wien bridge oscillator using op-amp. Derive its frequency of oscillation. What are the values of R & C is its frequency of oscillation = 1 Khz? 4 marks

3(a) With the help of a neat diagram & voltage transfer characteristics explain the working of a non-inverting Schmmit trigger. Derive the expressions for the threshold levels & explain how they can be varied. 4 marks

3(b) Draw the circuit diagram for a square and triangular waveform generator using operation amplifier. With the help of waveforms at suitable points in the circuit explain its working. Explain how the duty cycle can be varied. 4 marks

4(a) Design a voltage regulator using IC 723 to give output voltage of 15 V and output current of 1.5 A. 4 marks

4(b) With the help of neat diagram explain how IC LM 317 can be used as a variable voltage regulator. 4 marks

4(c) Differentiate between linear regulator & switching regulator. 4 marks

5(a) Draw the diagram for an astable multivibrator using timer 555. Design the same for a frequency of 5 Khz with duty cycle 70%. Draw the waveforms across the charging cpacitor and at the output. 4 marks

5(b) With the help of a neat circuit diagram explain the working of universal shift register IC 74194 as a 4 bit, 4 state ring counter with single circulating 'zero'. 4 marks

### Write short notes on any Four

6(a) Frequency to voltage converter 4 marks

6(b) Waveform generator XR 2206 4 marks

6(c) Voltage controlled oscillator 566 4 marks

6(d) Synchronous counter 74163 4 marks

6(e) Arithmetic logic unit 74181 4 marks