Презентация на английском языке "Transistor".

TRANSISTOR

What is a transistor?

A transistor is an electronic component that can be used as part of an amplifier (усилитель), or as a switch. It is made of a semiconductor material.

Transistors are found in most electronic devices. Most transistors are inside integrated circuits.

What is a transistor?

Three physicists were credited with the invention of the transistor in 1947: (from left) John Bardeen, William Shockley and Walter Brattain.

What is a transistor?

The transistor was not the first three terminal device. The triode served the same purpose of the transistor 50 years earlier. Vacuum tubes were big and fragile, used a lot of power, and didn't last very long. The transistor solved these problems.

How they work?

On a bipolar transistor, the wires can be called the emitter, the collector, and the base.

When the emitter is connected to the negative terminal of the battery, and the collector to the positive terminal, no electricity will flow in the circuit.

But when power flows through the base, the transistor will allow electricity through.

Importance

The transistor is a very important component today. If not for the transistor, devices such as cell phones and computers would be very different, or they might have not been invented at all.

Transistors have been made very small so that billions of them can be put into a small computer chip.

Transistor marking code

Information for a particular transistor is shown as a code on the body of the transistor.

According to the European system of coding, there are two letters before the number.

First letter represents the type of semiconductor used and the second one represents the use of transistor.

Transistor marking code

First letter

A – Germanium (Германий)

B – Silicon (Кремний)

C – Gallium Arsenide (Арсенид галлия)

D – Indium Antimide (Антимид индия)

Second letter

C – Audio frequency Amplifier

D – Audio frequency power amplifier

F – Low power Radio frequency amplifier

P – High power Radio frequency amplifier

Thus the transistor BC548 is

B – Silicon

C – Audio frequency amplifier – Silicon Audio frequency Amplifier (Кремниевый усилитель звуковой частоты)

Marking of the year and month of manufacture

Marking of the year and month of manufacture

According to the American system, the code begins with 2N followed by a number that indicates the time of design. A higher number indicates recent design.