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2003 Course Electronic Product Design

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Total No. of Questions : 12] P1351 [Total No. of Pages : 3 [3764]-242 B.E. (Electronics) ELECTRONIC PRODUCT DESIGN (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidate: 1) All questions are compulsory. 2) Answers to the two sections should be written in separate answer books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of electronic pocket calculator is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) With the help of a suitable example, explain steps taken to arrive at technical specification of a product to be manufactured on large scale. Explain how techno-commercial feasibility of a product is judged subsequently. [10] b) Draw a sketch of front panel of a Digital Multimeter and explain how ergonomic and aesthetic design considerations are taken care of in the same. [8] OR Q2) a) For following established practices of reducing Electromagnetic Interference, explain with the help of neat sketches the exact mechanism by which EMI is reduced - i) Twisted pair of wires, ii) Transzorb, iii) Shielding. [12] b) A Multivibrator circuit uses 2 transistors, 8 resistors, 2 capacitors and 2 diodes. It is followed by a buffer circuit consisting of one transistor and three resistors. If the failure rates of various components are as given below, find MTTF of the circuit in years. [6] Component Resistor Diode Capacitor Transistor Failure rate per 106 hours 0.6 0.2 0.6 0.65 P.T.O. 1

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