Semiconductor Devices Department of Technical Education Diploma Programme SECOND SEMESTER SUBJECT : SEMICONDUCTOR DEVICES Common to E&C & EI&C Hrs / Week -- 4 Total Hrs - 64

GENERAL OBJECTIVES: At the end the semester the student will be able to 1 Understand the theory of semiconductors 2 Study the working and applications of various semiconductor diodes. 3 Understand the working principle and applications of Bipolar Transistors, Field Effect Transistors and other Semiconductor Devices 4 Familiarization of fabrication of Integrated circuits

TIME ALLOCATION: TOPICS Contact Hrs UNIT-1 25 SEMICONDUCTOR THEORY 15 OTHER SEMICONDUCTOR DEVICES 12 UNIT-2 19 BIPOLAR TRANSISTORS 12 LASER & MASER 3 INTEGRATED CIRCUITS 4 UNIT-3 20 FIELD EFFECT TRANSISTORS 12 OPTO ELECTRONIC DEVICES 6 TOTAL 64

CONTENTS: 1 SEMICONDUCTOR THEORY 13 Atomic structure, Neil bohr's Atomic theory,Conductors, Insulators and Semiconductors, Energy level diagrams, Semiconductors - Intrinsic and extrinsic, Doping -- Trivalent and pentavalent dopants,P-type and N-type Semiconductors, Majority and Minority carriers,PN junction, Depletion region, Barrier potential, Effect of Temperature on Barrier voltage, biasing of PN junction, V-I characteristics of Semiconductor diode, Reverse current, Reverse Breakdown, Temperature Effect, Knee voltage, Maximum forward current, Peak Inverse voltage, Maximum power rating, equivalent circuit of Ideal diode, applications of Semiconductor diode Switch and Rectifier, working principle of Zener diode, V-I characteristics, applications- Zener diode --Voltage Regulator 2 BIPOLAR TRANSISTORS 12 Working principle of PNP and NPN transistor, Transistor in CB, CE CC Configuration, current amplification factor ' α'and ' β' , relation between them, Input and output characteristics of transistor in CB And CE configuration, Comparison of CB, CE, CC configurations, applications of Transistor --Switch and Amplifier in CE configuration, Thermal runaway, Heat sinks and Selection of Heat sinks 3 FIELD EFFECT TRANSISTOR 12

Introduction and classification of FET, Construction and operation of P-channel and N- channel JFET, characteristics of JFET, FET parameters rd, gm, u and their relationship, Comparison of JFET and BJT, advantages and applications of JFET, MOSFET, Types of MOSFET, Construction and working of P-channel and N-channel, Depletion and Enhancement MOSFET, advantages of MOSFET over JFET, CMOS Inverter, low power consumption feature of CMOS, applications of CMOS 4 OTHER SEMICONDUCTOR DEVICES 12 Basic working principle , characteristics and applications of following semiconductor devices: Unijunction Transistor, SCR, DIAC, TRIAC, varactor diode, tunnel diode, Gunn Diode, Pin diode, Step recovery diode, Schottky diode, IMPATT diode, TRAPPAT diode 5 OPTO ELECTRONIC DEVICES 8

Page 1 of 3 Semiconductor Devices Photoemissivity, Photoconductivity,photovoltaic effect, working principles and Application of Photodiode, phototransistor, LED, Opto coupler, Solar cell 6 INTEGRATED CIRCUITS 4 Introduction to Ics, advantages and disadvantages of Ics, classification of ICs by Scale of Integration, by Structure, by Function, fabrication of Monolithic Ics, fabrication of Transistor, Diode, Capacitor 7 Semiconductor LASER & MASER 3 Working & application of diode LASER and MASER

SPECIFIC OBJECTIVES:

1 SEMICONDUCTOR THEORY 1.1 Explain the Atomic structure, Neil bohr's Atomic theory 1.2 Explain Conductors, Insulators and Semiconductors in terms of Energy level diagrams. 1.3 Discuss the types of Semiconductors - Intrinsic and extrinsic 1.4 Doping -- Trivalent and pentavalent dopants 1.5 Explain the formation of P-type and N-type Semiconductors 1.6 Differentiate Majority and Minority carriers 1.7 Describe the formation of PN junction, Depletion region, Barrier potential, Effect of Temperature on Barrier voltage 1.8 Explain forward and reverse biasing of PN junction 1.9 Explain V-I characteristics of Semiconductor diode under forward and reverse bias 1.10 Discuss Reverse current, Reverse Breakdown, Temperature Effect, Knee voltage, Maximum forward current, Peak Inverse voltage, Maximum power rating 1.11 Analyse the equivalent circuit of Ideal diode 1.12 Illustrate the applications of Semiconductor ---- Switch and Rectifier 1.13 Explain the working principle of Zener diode--Zener and Avalanche breakdown 1.14 Explain V-I characteristics of zener under forward and reverse bias 1.15 Illustrate the applications of Zener diode --Voltage Regulator

2 BIPOLAR TRANSISTORS 2.1 Explain the construction & working principle of PNP and NPN transistor 2.2 Discuss the Transistor in CB, CE CC Configuration 2.3 Define current amplification factor 'Alpha'and 'Beeta' , relation between them 2.4 Study of Input and output characteristics of transistor in CB And CE configuration 2.5 Comparison of CB, CE, CC configurations 2.6 Explain the applications of Transistor --Switch and Amplifier in CE configuration 2.7 Define Thermal runaway 2.8 z

3 FIELD EFFECT TRANSISTOR 3.1 Introduction and classification of FET 3.2 Explain the Construction and operation of P-channel and N-channel JFET 3.3 Describe the characteristics of JFET 3.4 Define FET parameters rd, gm ,u and derive their relationship 3.5 Comparison of JFET and BJT 3.6 List the advantages and applications of JFET 3.7 Define MOSFET, Types of MOSFET 3.8 Explain the Construction and working of P-channel and N-channel Depletion and Enhancement MOSFET 3.10 List the advantages of MOSFET over JFET 3.11 CMOS Inverter 3.12 Explain the low power consumption feature of CMOS 3.13 List the applications of CMOS

Page 2 of 3 Semiconductor Devices

4 OTHER SEMICONDUCTOR DEVICES Explain the basic working principle , characteristics and applications of following semiconductor devices 4.01 Unijunction Transistor 4.02 SCR 4.03 DIAC 4.04 TRIAC 4.05 Varactor diode 4.06 Tunnel diode 4.07 Gunn diode 4.08 PIN diode 4.09 Step recovery diode 4.10 Schottky diode 4.11 IMPATT diode 4.12 TRAPPAT diode

5 OPTO ELECTRONIC DEVICES 5.1 Define Photoemissivity, Photoconductivity,photovoltaic effect 5.2 Explain working principles and Application of 5.2.1 Photodiode 5.2.2 phototransistor 5.2.3 LED 5.2.4 Opto coupler 5.2.5 Solar cell

6 INTEGRATED CIRCUITS 6.1 Introduction to ICs 6.2 List the advantages and disadvantages of ICs 6.3 Study the classification of ICs by Scale of Integration, by Structure, by Function 6.4 Describe the fabrication of Monolithic ICs 6.5 Study the fabrication of Transistor, Diode, Capacitor

7 Semiconductor LASER & MASER 7.1 Explian working & application of diode LASER 7.2 Explian working & application of MASER

TEXT BOOKS:

1 Electronic Principles- Malvino 2 Semiconductor Devices By V K Veeranna & Janaki V S, Sapna Publications 3 Electronic Devices and Circuit Theory- Robert Boylestead and Louis Nashelsky 4 Electronic Devices, circuits and applications- Mathur, Kulsheshta, Chadha REFERENCE BOOKS: 1 Electronic Devices and Circuits - Millman and Halkias 2 Electronic Devices and Circuits - Allan Mottershed 3 Electronic Devices - Floyd 4 Electronic Circuits and System - Bapat 5 Semiconductor circuit Approximations--- Malvino (iv Edition) 6 Electronic Devices and circuits -David .A.Bell 7 Principles of Electronics - V.K. Mehtha

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