What is a transistor?

Andrey Kim
Andrey Kim
December 19, 2014
What is a transistor?

A transistor is a radio element made of semiconductor material and having three outputs — a base, an emitter, and a collector. The main function of the transistor is to control the current in the circuit. Let's see what a transistor is and where it is applied.

In a general sense, a transistor can be called any device that can change a signal if a change has occurred on the control electrode of the device itself. A classical transistor, which is called a bipolar transistor, can control the output current of a circuit in proportion to the change in current or voltage at the input. In this case, it is important to note that a small change in the input of the transistor can turn into a significant change in the output parameters, that is, the transistor has an amplifying property.

Where is the transistor used?

The transistor is widely used in amplifier circuits, in this case, the transistor operates in the so-called amplifier mode - the generation of arbitrary pulses.However, if we are talking about digital technology, to create an amplifying circuit can be used and key mode - the mode of generating rectangular pulses.

Also, transistors are widely used to create generators, and, in this situation, both amplification mode and key mode are used, depending on what type of generator is needed to be made.

In addition, transistors are used to create electronic keys, here they work in key mode.