In the name of Allah, the Most Gracious the Most Merciful

Prepared By : Engr KSK 1

ELECTRONIC DEVICES

& CIRCUIT -II

Prepared By : Engr KSK 2

Course Objective

This course covers the different aspects of Amplifier circuit

Design and in-depth analysis of these circuits.

Frequency response

Internal design of Operational Amplifiers.

Design of special electronic circuits.

Prepared By : Engr KSK 3

Course Outline

Prepared By : Engr KSK 4

Frequency response of different single stage amplifier configurations of

BJTs and MOSFETs. Millers theorem

Internal design of operational amplifiers, input stage, current source,

output stage

Differential and Multistage Amplifiers

Feedback configurations

Active Filters, Signal generators (RC oscillator, multivibrators)

Integrated circuit timers (different modes of 555)

CMOS Logic gates and relay drive circuits

Recommended Books

1. Electronic Devices by Floyd, latest Edition, Prentice hall

2. Principles of Electronic Devices and Circuits by Malvino, Latest

Edition.

3. Electronic Devices and Circuits: Conventional Flow Version, Pearson/

Prentice Hall, by Michael Hassul and Donald E Zimmerman, Latest

Edition.

4. Electronic Devices & Circuits by Boylested, Nashelsky,9th Edition

5. Microelectronic Circuits by Sedra. A.S, Smith. K.C

Prepared By : Engr KSK 5

Grading Policy

Sessionals (30%)

Class assignments

Chapter end problems

Quizzes

Project

Mid-Semester Exam (20%)

End-Semester Exam (50%)

Lab Sessionals (15%)

Lab Viva (10%)

(75 %)

(25 %)

Prepared By : Engr KSK 6

Prepared By : Engr KSK

FET AMPLIFIER

Monday, February 24, 2014

CHAPTER NO. 08

7

Prepared By : Engr KSK 8

Describe the amplification properties of a FET

Explain and analyze the operation of common-source FET amplifiers

Explain and analyze the operation of common-drain FET amplifiers

Explain and analyze the operation of common-gate FET amplifiers

Chapter Objectives

Prepared By : Engr KSK 9

Unipolar device i. e. operation depends on only one type of chargecarriers (h or e)

Voltage controlled Device (gate voltage controls drain current)

Very high input impedance (109-1012)

Source and drain are interchangeable in most Low-frequencyapplications

Low Voltage Low Current Operation is possible (Low-powerconsumption)

Less Noisy as Compared to BJT

No minority carrier storage (Turn off is faster)

Self limiting device

Very small in size, occupies very small space in ICs

Low voltage low current operation is possible in MOSFETS

Advantages of FET over conventional Transistors

Prepared By : Engr KSK 10

FET Amplification

Describe the amplification properties of a FET

Discuss FET parameters using an equivalent circuit

Discuss the voltage gain of a FET

Describe the effect of internal drain-to-source resistance on the voltage gain

Describe the effect of external source resistance on the voltage gain

Prepared By : Engr KSK 11

FET Equivalent Circuit

Prepared By : Engr KSK 12

FET Voltage Gain

Prepared By : Engr KSK 13

Example No# 8.1

Solution

NASIRHighlight

Prepared By : Engr KSK 14

Effect of r'ds on Voltage Gain

NASIRHighlightinternal drain-to-source resistance effect

Prepared By : Engr KSK 15

Example No# 8.2

NASIRHighlight

Prepared By : Engr KSK 16

Solution

Prepared By : Engr KSK 17

Effect of External Source on Voltage Gain

NASIRHighlight

Prepared By : Engr KSK 18

Example No# 8.3

Prepared By : Engr KSK 19

Solution

Prepared By : Engr KSK

COMMON SOURCE AMPLIFIER

Monday, February 24, 201420

Prepared By : Engr KSK 21

JFET Common Source Amplifier

Prepared By : Engr KSK 22

Graphical Analysis: JFET CS Amplifier

Prepared By : Engr KSK 23

DC Analysis: JFET CS Amplifier

Prepared By : Engr KSK 24

Calculation of ID: JFET CS Amplifier

Prepared By : Engr KSK 25

DC Analysis: JFET CS Amplifier

Prepared By : Engr KSK 26

AC Equivalent Circuit: JFET CS Amplifier

Prepared By : Engr KSK 27

Voltage Gain: JFET CS Amplifier

Prepared By : Engr KSK 28

Example # 8.4

Prepared By : Engr KSK 29

Solution

Prepared By : Engr KSK 30

Effect of an AC Load on Voltage Gain

Prepared By : Engr KSK 31

Example # 8.5

Solution

Prepared By : Engr KSK 32

Input Resistance: JFET CS Amplifier

Prepared By : Engr KSK 33

Example # 8.6

Prepared By : Engr KSK 34

Solution

Prepared By : Engr KSK 35

D-MOSFET Amplifier Operation

Prepared By : Engr KSK 36

D-MOSFET Amplifier Operation

Prepared By : Engr KSK 37

Example # 8.7

Prepared By : Engr KSK 38

Solution

Prepared By : Engr KSK 39

E-MOSFET Amplifier Operation

Prepared By : Engr KSK 40

E-MOSFET Amplifier Operation

Prepared By : Engr KSK 41

Example # 8.8

Prepared By : Engr KSK 42

Solution

Prepared By : Engr KSK 43

E-MOSFET Amplifier Operation

Prepared By : Engr KSK 44

Example # 8.9

Prepared By : Engr KSK 45

Solution

Prepared By : Engr KSK

COMMON DRAIN AMPLIFIER

Monday, February 24, 201446

Prepared By : Engr KSK 47

JFET Common Drain Amplifier

Prepared By : Engr KSK 48

Voltage Gain: JFET Common Drain Amplifier

Prepared By : Engr KSK 49

Input Resistance: JFET Common Drain Amplifier

Prepared By : Engr KSK 50

Example # 8.10

Prepared By : Engr KSK 51

Example # 8.10 (Data Sheet)

Prepared By : Engr KSK 52

Solution

Prepared By : Engr KSK

COMMON GATE AMPLIFIER

Monday, February 24, 201453

Prepared By : Engr KSK 54

JFET Common Gate Amplifier

Prepared By : Engr KSK 55

Voltage Gain: JFET Common Gate Amplifier

Prepared By : Engr KSK 56

Input Resistance: JFET Common Gate Amplifier

Prepared By : Engr KSK 57

Example # 8.11

Prepared By : Engr KSK 58

Example # 8.11 (Data Sheet)

Prepared By : Engr KSK 59

Solution