I B.Tech Supplementary Examinations, November/December 2005 SEMICONDUCTOR DEVICES & CIRCUITS ( Common to Electrical & Electronic Engineering,Electronics & Communication Engineering,Computer Science & Engineering,Electronics & Instrumentation Engineering,Bio-Medical Engineering,Information Technology,Electronics & Control Engineering,Computer Science & Systems Engineering,Electronics & Telematics and Electronics & Computer Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
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1. (a) Explain with a block diagram the details of each and every block in CRT.
(b) In a cathode ray tube having magnetic deflection system, the screen is 26 cms away from the centre of the deflection coils. The length of the uniform magnetic field along the axis is 4 cms. If a deflection of 4 cms is required on the screen, what is the amount of magnetic flux density required for the final anode voltage of 1500V. [10+6] 2. (a) Explain various applications of pn- junction diode.
(b) Explain the principle of Tunneling phenomena using energy level diagrams. [6+10]
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3. (a) Explain i/p and o/p characteistics of BJT in CE configuration using a relevant circuit. (b) Compare the performance of BJT transistor in CE, CB, CC configuration with reference to Ri, Ro, Av and Ai . [8+8] 4. What is the need for biasing a transistor? What are various methods of biasing? Compare their performances. [16]
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5. (a) Prove that emitter follower circuit proves very high input resistance and very low o/p resistance. (b) Derive the expression for β - cutoff frequency of hybrid-π CE amplifier. [8+8]
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6. (a) What are the advantages of negative feedback? Prove that the negative feed back improves the Bandwidth and reduces the gain of an amplifier circuit. (b) Derive an expression for voltage gain of voltage series feed back amplifier. [10+6]
7. (a) Distinguish between an oscillator and an amplifier. (b) Derive an expression for frequency of oscillation of Hartlely oscillator with a circuit diagram. [6+10]
8. (a) Classify large signal amplifiers and compare them. 1 of 2
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(b) Derive an expression for conversion efficiency of class B pushpull amplifier circuit. [8+8]
the following (with comments and indentation) · a) To read the ... OR. Develop a complete COBOL program with indentation and comments to do the · following:.
... shown below. Take node 4 as reference · node. 7.a) Obtain the relation between Y and Z parameters. b) Find A B C D parameters of the network shown below.
10 kVA at 0.8 pf lagging, load B draws 15 kW at a 0.5 pf lagging and load C · dissipates 5 kW at unity pf. (i) Find active power, reactive power and line current.
potential and muscle contraction. 2.a) With a neat ... b) Explain the origin of ECG from the heart muscles. ... 4.a) What are the different types of muscles? Explain ...
... plate capacitor is · equal to the conduction current in the leads. b) Investigate the vector magnetic potential for the infinite, straight, current element · L in free space. 3. Find the magnetic field intensity due to the presence of a finite st
2.a) With a neat sketch explain the operation of a cupola, its charge composition and · control of the melt composition. b) Briefly explain the pressure die casting ...
b) Explain heat treatment given to high speed tool steels. 7. Explain structure, properties and applications of any THREE of the following: · (a) Al-Si alloys (b) ...
Polynomials in single variable are stored in the form of linked lists. Each · structure has space for one coefficient and one exponent and a link. Assume.
armature and field resistances are 0.03 ohm. And 60 ohm ... 6.a) Explain with the help of diagrams how a rotating magnetic field is produced in · the air gap of a ...
Explain in detail gas liquid contact in mechanically agitated vessels. ... b) Derive the expression for height of a water cooling tower by using HTU and NTU.
Explain determinants and use of determinancy diagram. 2.a) ... Draw the E/R model representation of many-to-many relationship and · superfluous entity tables.
b) Give the steps of a registry-based algorithm for finding and using idle · workstations. 4.a) With reference to distributed file system implementation explain i) ...
b) State the method of manufacturing and special qualities of the following bricks. (i) sand â lime bricks (ii) Fly ash bricks (iii) Stabilised bricks. c) Explain briefly ...
c) What is the difference between the BSA instruction and the interrupt cycle? 8. Write short notes on any two: · a) RISC and CISC Processors. b) Priority interrupt ...
Explain about harmonics generated in e.m.f of a synchronous machine. ... A â 3 â Phase star connected, 4- pole, 50Hz. Alternator develops an open circuit.
Code No: 210853. II-B.Tech. I-Semester Supplementary ... b) How is Quinoline obtained by Skraup synthesis? 8.a) What are dyes? b) How they are classified?
1. a) Define the role of each of the following components in the operation of an ... b) Compare and contrast the vertical and horizontal micro instructions.
Briefly discuss about Reflections and cross talk problems that affect digital PCBs. 6. Sketch the geometry of a screen fabric and explain about Monofile polyester.
b) The average zinc contrition recovered from a sample of zinc measurements in 36 · different locations is found to be 2.6 grams per milliliter. Find the 95% and ...
1.a) Mercury thermometer is a first order system â Say âTrueâ or âFalseâ. b) Prove your answer by deriving the transfer function of this system. c) How will this ...
