MINI PROJECT PRESENTATION ONCE, 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]

CONTENTS

INTRODUCTION

DIODE

POWER SUPPLY

COMPONENTS OF POWER SUPPLY

TRANSISTOR

BIPOLAR TRANSISTOR

CE APMLIFIER

CB AMPLIFIER

CC AMPLIFIER

SOFTWARE DIAGRAMS

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

Diode

Diodes are basic unidirectional Semiconductor Devices.

It has an exponential I-V relationship.

Diodes are manufactured using Doping Technique

Resistivity Chart

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

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.

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.

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

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 )

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

Output Characteristics Curves of a Typical Bipolar Transistor

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

Experimental Output of CE

Amplified output

Signal Input

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

Experimental Output of CB Amplifier

Signal Input

Amplified output

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

Experimental Output of CC Amplifier.

Signal Input

Signal output

PROTEL Circuit Design Diagram.

SOFTWARE PROTEUS CIRCUITS

CE Amplifier

CB Amplifier

CC Amplifier

Completed Circuit Board

Thank you