This document summarizes a student project presentation on CE, CB, and CC transistor amplifiers. It includes introductions to diodes, transistors, and the three basic transistor amplifier configurations. For each amplifier type, it provides a brief description of the configuration and key features, along with experimental output waveforms. It also includes Protel circuit design diagrams and software simulations of the three amplifier circuits on Proteus. The project aims to explain the basic workings and characteristics of common emitter, common base, and common collector transistor amplifier circuits.

1. MINI PROJECT PRESENTATION ON
CE, CB, CC AMPLIFIERS
Guide: Mr. S.Sravana Kumar
Asst. Professor
Adithya.R ………………..….11E31A0401[ECE-A IV Year]
A.Sindhu Reddy………….…11E31A0402[ECE-A IV Year]
Anirudh Kulkarni…………..11E31A0403[ECE-A IV Year]
A.Bhanuteja………………….11E31A0404[ECE-A IV Year]
B.Bharath Kumar Reddy…11E31A0405[ECE-A IV Year]

2. CONTENTS
 INTRODUCTION
 DIODE
 POWER SUPPLY
 COMPONENTS OF POWER SUPPLY
 TRANSISTOR
 BIPOLAR TRANSISTOR
 CE APMLIFIER
 CB AMPLIFIER
 CC AMPLIFIER
 SOFTWARE DIAGRAMS

3. INTRODUCTION
 An amplifier is an electronic device that increases the voltage, current, or power of a
signal.
 There are four basic types of electronic amplifier:
• Voltage amplifier
• Current amplifier
• Transconductance amplifier
• Transresistance amplifier

4. Diode
 Diodes are basic unidirectional Semiconductor Devices.
 It has an exponential I-V relationship.
 Diodes are manufactured using Doping Technique

5. Resistivity Chart

6. POWER SUPPLY
 The main aim of this power supply is to convert the 230V AC into 5V DC.
 In this process we are using a step down transformer, a bridge rectifier, a smoothing
circuit and the RPS.
Functional block diagram

7. Components in Power supply
 1.Step-down Transformer- To step down 230V A.C to 5V A.C .
 2.Rectifier- used to convert A.C to pulsating D.C.
 3.Filter- Converts Pulsating DC into Pure D.C.
 4.Voltage Regulator-7805-used to supply a stable voltage.

8. Bridge rectifier
 A bridge rectifier is an arrangement of four or more diodes in a bridge circuit
configuration which provides the same output polarity for either input polarity.
 It is used for converting an alternating current (AC) input into a direct current (DC)
output.

9. TRANSISTOR
 A transistor is a semiconductor device.
 It can be used as an Amplifier or as a Switch.
 Transistors are the basic elements in integrated circuits (ICs).
 The Major types of transistor are:
• BJT
• JFET
• MOSFET
• UJT

10. Bipolar Junction Transistor
 Two junction, three terminal device formed by joining together two individual signal
diodes back-to-back.
 The three terminals are known as
• The Emitter ( E )
• The Base ( B )
• The Collector ( C )

11.  Transistor has Three basic configurations:
• Common Emitter Configuration – has both Current and Voltage Gain.
• Common Base Configuration – has Voltage Gain but no Current Gain.
• Common Collector Configuration – has Current Gain but no Voltage Gain.
 Bipolar Transistors have the ability to operate within three different regions:
• Active Region – the transistor operates as an amplifier and Ic = β.Ib
• Saturation – the transistor is “Fully-ON” operating as a switch
• Cut-off – the transistor is “Fully-OFF” operating as a switch

12. Output Characteristics Curves of a Typical Bipolar Transistor

13. Common Emitter Amplifier
 a common emitter amplifier is typically used as a voltage amplifier
 Input is applied to base ,output is taken across collector and the emitter is grounded.
 Features:
• Moderate /high input impedance.
• Moderate output impedance.
• High Voltage Gain
• High Currant Gain.
• Output is Inverted

14. Experimental Output of CE
Amplified output
Signal Input

15. Common base amplifier
 A common base also known as grounded-base amplifier is typically used as
a voltage amplifier.
 In this circuit
• The emitter terminal serves as the input
• The collector as the output
• The base is connected to ground, or "common”.
 Features:
• Low input impedance.
• Moderate/High output impedance.
• High Voltage Gain
• Unity Current Gain.
• Non-inverting amplifier.
The Common base amplifier circuit

16. Experimental Output of CB Amplifier
Signal Input
Amplified output

17. Common collector
 Common collector amplifier also known as an emitter follower typically used as
a voltage buffer.
 In this circuit
• The base terminal serves as the input,
• The emitter is the output
• The collector is common.
 Features:
• Moderate/high input impedance.
• Low output impedance.
• Low (unity) voltage gain.
• High Current Gain.
The CC amplifier circuit

18. Experimental Output of CC Amplifier.
Signal Input
Signal output

19. PROTEL Circuit Design Diagram.

20. SOFTWARE PROTEUS CIRCUITS

21. CE Amplifier

22. CB Amplifier

23. CC Amplifier

24. Completed Circuit Board

25. Thank you