JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD I St B.Tech Supplementary Examinations June – 2009 SEMICONDUCTORS AND DEVICES AND CIRCUITS (Common to EEE,ECE,CSE,CSIT,EIE,BME, E.CONT.E,ETM ,ECC and CSSE) Max Marks: 80 Answer any FIVE Questions. All Questions carries equal marks. -----
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Time: 3 hours
Define deflection sensitivity for electrostatic and magnetic deflections. What are the application of C.R.O. Explain them clearly.
2.a) b)
Explain about forward and reverse bias V-I characteristics of pn junction diode? Explain clearly about avalanche and zener breakdown phenomena.
3.a) b)
Compare and contrast CE,CB and CC configuration of BJT. What are h-parameters? Define them. Draw the h-parameters model of BJT.
4.a)
What are the characteristics of FET. Why the FET is called voltage controlled devices? Give the constructional features of UJT and draw it V-I characters tics.
5.a) b) 6.a) b) 7.a)
What are the advantages and disadvantages of negative feedback? What are the conditions for sustained oscillators? Draw the colpitts oscillators circuit and in that C2=10nF, L=110µF. Find feedback factors and operating frequency.
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b)
What is biasing? What are different types? Draw the circuit of self bias circuit and explain. Derive the expressions for AI and A of CE amplifier circuit. In a CE amplifier circuit, Re=5kΩ, RS=1.2Ω, ufe=100, hie=1.1kΩ, hoe=25µ . Find Ri, Ai, Ai, and RO. Define fα,fβ,fT and gain bandwidth product of HF model of a transistor.
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b)
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Compare class A,B and C power amplifiers. Explain the principles of push-pull power amplifier.
5. a) Define i)cycle, ii) circuit and iii) path. b) What is the chromatic number of i) Tree ii) wheel graph iii) complete graph Kn and · iv) complete bipartite graph Km, ...
Ae · Ï · Ï · â · = · where' A' and 'a' are real positive constants is · applied to the input of an LTI system with h(t)= · where b is real positive · constant. Find the PSD ...
b) Explain the treatment of water for drinking purpose? [8+8] ... b) A sample of hard-water from an underground reservoir in Warangal, A.P., · showed the ...
b) What is oxygen Effect? [10+6] · 6.a) Describe the protective measures .... 5.a) Explain the principles of Radio therapy. b) Explain briefly about the normal tissue ...
b) Represent the decimal number 8620 in binary. c) How do you convert an RS flip-flop into a T-flip-flop? d) Distinguish between Truth table and excitation table.
Explain the importance of concurrent Engineering in product development. [16] ... the traditional product development cycle and Product development using.
6.a] Explain different types of floors in brief. b] Explain what is DPC and what are the different materials used. [8+8] · 7. Write short notes on: · i.] Scaffolding.
Explain the following with examples · a) Exception Handler · b) Disabling an exception ... 3.a) What are the design issues for character string types? b) What array initialization feature is available in ... b) What are the disadvantages of designing
II Year B.Tech. CE -I Sem. L T/P/D C. 4. -/-/-. 4. MATHEMATICS - II. Objectives: The objective is to find the relation between the variables x and y out of the given data (x,y). The aim to find such relationships which exactly pass through data
b) Determine how many carriers can access an 80 MHz transponder in the FDMA mode, · given that each carrier requires a bandwidth of 6 MHz, allowing for 6.5 ...
energy, photosynthetic reaction centres, Hill reaction, PS I & PS II, ...... Growing energy needs, renewable and non-renewable energy sources use of alternate ...
random process and two or more random processes. Markov process, Markov chain, classification of states â. Examples of Markov Chains, Stochastic Matrix. TEXT BOOKS: www.jntuworld.com || www.android.jntuworld.com || www.jwjobs.net || www.android.jwj
(CIVIL ENGINEERING) · Time: 3 hours · Max. Marks.80 · Note:- Answer any one question · Assume suitable data if necessary · --- · 1. Design and draw plan and ...
7) a) With the help of P-V and T-S diagrams, show that for the same maximum · pressure and temperature of the cycle and the same heat rejection thermal.
Identity the distributing aspect of science of fiction and examine how this problem can · be resolved. [16] · 3. Do you justify that the story of Silent Spring is a fable for tomorrow? [16] · 4. In what ways does chemical pollution affect the structu
(Common to Information Technology, Computer Science and Systems ... candidates of particular constituency, their bio-data, address of the polling booths, · etc.
[16] · 6. Explain the role played by Small Industries Service Institute (SISI) in promoting ... f. National Small Industries Corporation (NSIC). g. Small Scale ...
