transistor definition and function

transistor definition and function. transistors are active components of semiconductors that the transistor function as current amplifiers. transistors can be met in the amplifier, tone control, preamp, and so forth

The physical shape of the transistor is to have 3 feet each named base, collector, and emitter

transistors consist of 2 types of NPN (negative negative negative) and PNP (positive positive positive)

NPN and PNP transistors work in reverse. Also read the basic difference between PNP and NPN transistors

Read also an article How to prevent heat on the transistor

transistors are divided into 2 types of unipolar transistors and bipolar transistors

Unipolar transistors are often referred to as FET (field effect transistor)

unipolar transistors use a load-carrying semiconductor in the manufacture of either a N-type semiconductor or a P-type semiconductor

Unipolar or FET transistors have 3 legs namely gate (G), drain (D), and source (S)

This type of transistor is rarely used because most electronics circuits use bipolar type transistors

Bipolar transistor or often called by the name of transistor Dwi pole is a transistor using 2 pieces of carrier in the making

Therefore, in bipolar transistors will be known by 2 types of NPN (negative negative negative) and PNP type (positive positive positive)

In this article I will explore more about bipolar transistors only because these transistors are often used in electronic circuits

In bipolar transistors NPN and PNP transistors work in reverse

the legs on a bipolar transistor

What are the legs of bipolar transistors? In bipolar transistors will be known as the base foot, collector, and emitter

what are the leeg transistor functions?

base

The base foot is the leg of the transistor that serves to regulate the flow of electrons that will flow from the emitter’s feet to the collector’s feet

the magnitude of the electron current is regulated through this foot. Keep in mind that the electron current is different from the electric current

collector

collector foot is the leg of the transistor that serves as a gathering place of electrons after previously arranged by the base foot

emitter

The emitter leg serves as a gathering place for electrons before being regulated by the base leg

transistor definition and function

The physical shape of the transistor is like the following picture

transistor definition and function
transistor

Transistor symbol

Npn Transistor Symbols

The npn transistor symbol is marked with an outward arrow on the emitter foot. An example of an NPN transistor is TIP 31, TIP 41, 2N3055

npn transistor symbol's
npn transistor symbol’s

Symbol of Pnp Transistor

The symbol of a Pnp transistor is indicated by an incoming arrow on the emitter leg. Examples of PNP transistors are TIP 32, TIP 42, MJ2955

pnp transistor symbol's (transistor function)
pnp transistor symbol’s

The ways to distinguish between PNP and NPN transistors are as follows

You must know the position of base feet, collectors, and emitter first

Types of transistors

Characteristics of NPN transistors

By looking at the arrangement of the legs of transistors in the circuit then my friend can determine the type of transistor

For npn type transistors then the foot arrangement is as follows

  • The emitter foot is usually toward the negative pole or lower voltage than the collector’s
  • collector voltage usually towards positive or higher voltage than the emitter voltage
  • if the base is given negative current then the transistor dies if given positive current then the transistor is alive

Transistors are mostly found in radio amplifiers

Characteristics of PNP transistors

Until pnp transistor then how to determine it is

  • the emitter leg is usually toward the positive pole or higher voltage of the collector
  • The collector’s feet are usually toward the negative or lower voltage of the emitter
  • if the base is given a positive current then the transistor dies if it is given with a negative live transistor

The most commonly used transistors are c945, a733, tip 31, tip 32, tip 41, tip 42, 2n3055, mj2955

For the transistor the final amplifier (2n3055 and mj2955) is usually installed cooling and resistors that serve to prevent damage due to heat

read also an article about what is crystal how does it work

the function of transistor

The most important transistor function is as a current amplifier and as a switch. Transistors as current amplifiers are often used in amplifiers while transistors as switches are often found in automatic light circuits

Here’s a simple circuit of a transistor as a current amplifier

the function of transistors

Also read making simple battery charger circuit

The above circuit with a small base current can then turn on a large collector current so the light is on. So an article about transistor definition and function

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