Mr.Akkarapon Soottara (1)

TTE
DEPARTMENT

Transistor
E-book


PRESENTED BY KMUTNB

Mr.Akkarapon Soottara

TTAABBLLEE
OOFF

CCOONNTTEENNTTSS

1.WHAT IS TRANSISTOR
2.TRANSISTOR CONSTRUCTION
3.TRANSISTOR SYMBOL
4.TYPE OF TRANSISTOR
5.TRANSISTOR APPLICATION

WHAT IS TRANSISTOR

A transistor is a semiconductor device used to
amplify or switch electrical signals and power.
The transistor is one of the basic building blocks
of modern electronics.

It is composed of semiconductor material,
usually with at least three terminals for
connection to an electronic circuit.

A voltage or current applied to one pair of the
transistor's terminals controls the current
through another pair of terminals. Because
the controlled (output) power can be higher than
the controlling (input) power, a transistor can
amplify a signal.

Some transistors are packaged individually, but
many more are found embedded in integrated
circuits.

TRANSISTOR CONSTRUCTION

Working of NPN Transistor

The input voltage to the NPN transistor is to
supply negative power to pin E compared to supply to
pin B and supply positive power to pin C.
Compared to the negative power supplied to Pin B,
there are both positive and negative lights, but the
Forward potential is only compared between Pin B and
Pin E.
This causes pin B which is substance P to receive
forward voltage which is positive voltage compared to
pin E only as shown in the figure.

TRANSISTOR CONSTRUCTION

Working of a PNP Transistor

Voltage is applied to a PNP transistor by supplying
positive power to the E pin as opposed to the negative
power supplying to the B pin and negative power supply.
into pin C compared to the positive power supplied to
pin B, causing pin B to have both negative and positive
lights, causing pin B, which is substance N, to receive
forward bias, Negative with respect to pin E only, shown
in the figure.

TRANSISTOR SYMBOL

TYPE OF TRANSISTOR

A transistor is a semiconductor device used to
amplify or switch electronic signals. Transistors are
broadly divided into three types: bipolar transistors
(bipolar junction transistors: BJTs), field-effect
transistors (FETs), and insulated-gate bipolar
transistors (IGBTs).

Bipolar Transistor (npn) Insulated-Gate Bipolar


Transistor
IGBT

Insulated-Gate Field-Effect Transistor MOSFET
(N-channel)

TRANSISTOR APPLICATION

Various Applications and Uses of Transistor

The core use of transistors includes switching
applications or both amplification and switching.
There is a kind of transistors that produce
current flow depending on the amount of light
shined upon them; those are known as
phototransistors.
Bipolar Junction Transistors(BJT) can cause a
greater current flow from the emitter to the
collector when a small amount of current is
passed through the base.