bipolar junction tranisistor full detailed ppt

1. BIPOLAR JUNCTION TRANSISTOR(BJT)
DEPARTMENT OF ECE
𝓝.𝓗𝓐𝓡𝓢𝓗𝓐 𝓥𝓐𝓡𝓓𝓗𝓐𝓝(21701A0451)

2. TRANSISTOR:
What is a Transistor?
A transistor is a type of a semiconductor device that can be used to both conduct
and insulate electric current or voltage. A transistor basically acts as a switch and
an amplifier. In simple words, we can say that a transistor is a miniature device
that is used to control or regulate the flow of electronic
signals.

3. ENERGY BANDS(⚡️):

4. DEVELOPED IN THE
YEAR 1947
 John Bardeen
 Walter Brattain
 William Shockley

5.  TABLE OF CONTENTS
PARTS OF A TRANSISTOR
TYPES OF TRANSISTORS
HOW DO TRANSISTORS WORK?
CHARACTERISTICS OF TRANSISTOR
ADVANTAGES OF TRANSISTOR

6. PARTS OF A TRANSISTOR
• A typical transistor is composed of three layers of semiconductor materials or more
specifically terminals which helps to make a connection to an external circuit and carry the
current. A voltage or current that is applied to any one pair of the terminals of a transistor
controls the current through the other pair of terminals. There are three terminals for a
transistor.
Base: This is used to activate the transistor.
Collector: It is the positive lead of the transistor.
Emitter: It is the negative lead of the transistor

8. WORKING PRINCIPLE:
• Well, the very basic working principle of a transistor
is based on controlling the flow of current through
one channel by varying intensity of a very smaller
current that is flowing through a second channel.
• Also Read:
• Transistor as a Switch
• Transistor as Amplifier

9. TYPES OF TRANSISTORS:

10. THERE ARE THREE TYPES OF CONFIGURATION
In Common Base (CB) configuration the base
terminal of the transistor is common between
input and output terminals.
In Common Collector (CC) configuration the
collector terminals are common between the
input and output terminals.

11. In Common Emitter (CE) configuration the emitter terminal is common between the input
and the output terminals

12. ADVANTAGES & LIMITATIONS OF TRANSISTOR
Advantages:
• Lower cost and smaller in size.
• Smaller mechanical sensitivity.
• Low operating voltage.
• Extremely long life.
• No power consumption.
• Fast switching.
• Better efficiency circuits can be
developed.
• Used to develop a single integrated
circuit.
Limitations:
• Transistors lack higher electron
mobility.
• Transistors can be easily damaged
when electrical and thermal events
arise. For example, electrostatic
discharge in handling.
• Transistors are affected by cosmic
rays and radiation.

13. CONCLUSION:
A single NPN BJT was used to drive this differential
amplifier. The collector current entering the NPN BJT will be
the current source driving the differential amplifier. The
transistor is good component to get amplified current using a
very small current.