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Pune University - Sem - I : Electronics, April 2010

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Total No. of Questions : 7] P881 [Total No. of Pages : 2 [3722]-102 M. Sc. PHYSICS PHY UTN - 502 : Electronics (New Course) (Sem. - I) Time : 3 Hours] [Max. Marks : 80 Instructions to the candidates : 1) Question No. 1 is compulsory. Attempt any four questions from the remaining. 2) Figures to the right indicate maximum marks. 3) Draw neat diagrams wherever necessary. 4) Use of logarithmic tables and calculator is allowed. Q1) Attempt any four of the following : a) State atleast four parameters of Op.Amp. and explain any two in detail. [4] b) Design a wide band reject filter having fh = 400 Hz and fl = 2 kHz with pass band gain as 2. Choose C = 0.1 F. [4] c) Design a 5V regulated power supply using LM317. Assume value of [4] R1 = 240 and Iadj = 100 A. d) What is 7490 IC? Design a divide-by-20 counter using ICs 7490. e) Design a function generator using IC 8038 to generate wave form of frequency of 5 kHz. Assume duty cycle is 50%. [4] f) Draw logic diagram of 2 line to 1 line multiplexer and explain its working. [4] Q2) a) Given the logic equation Y = ABC + BCD + ABC make a truth table. Simplify using Karnaugh-map and sketch the necessary logic diagram. [8] b) Draw the circuit diagram of Instrumentation Amplifier using Op.Amp. and explain its working. Explain how gain can be adjusted using single resistance. [8] Q3) a) Draw the block diagram of counter type ADC and explain its working in detail. What is the resolution of an 8 bit ADC whose max. input voltage range is 10V. [8] [4] P.T.O.

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Additional Info : M.Sc. PHYSICS, PHY UTN - 502 : Electronics (New Course) (Semister - I), Pune University
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