once called the transistor radio, but in this article we do not go on the radio.So is it the transistor and how it works.
There is a class of materials for their properties called semiconductors.A distinctive feature is their conductivity - they can be a conductor of electric current, and dielectrics, ie,insulators and do not conduct electricity.
Here the material used to make the transistor - the semiconductor device is widely used in industry and serving the basis of almost all modern electronics.
not touching technology, the types of transistors, their application, just note that there are different types of transistors, for example, npn transistor.This name was given because of the material used and conductivity type.What is said, it is enough to go into manufacturing technology and a variety of transistors are not going to.
How does a transistor?It is designed to control the electric current, structurally made in metal or plastic housing and has three terminals, called emitter, base, collector.Even the name says, the findings of their appointment: emitter emits electrons, the base manages them, the collector collects them.All these processes take place inside the transistor.
To understand how the transistor, consider a much simpler example - a faucet.
He has also three terminals - one water enters the valve, on the other pours from the faucet, the third is a valve which controls the operation of the crane.When the valve is opened, water flows freely through the valve when the valve is closed, the water does not flow.This is an imitation of one embodiment of how the transistor.This mode of operation is called the key - the transistor - the electric current, or closed, when the current is not.In order to open the base of the transistor is energized if the voltage is, the transistor if there is, it is closed.Everything happens as in the faucet valve is open - the water flows, the valve is closed - no water.
above was considered the work of the transistor when it is used as a key, either closed or open.However, other modes of operation.Again, as an example, consider a faucet.If a little to lift the valve, the tap water will flow continuously and the water pressure will be determined by how much we opened the tap.
About the same operation there in the transistor.On its base receives the voltage, it opens, and through it is current.Varying the voltage on the base, it is possible to control the magnitude of current flowing through the transistor.Complete analogy with the position of the valve on the tap out more open - more water flows (ie current transistor);less open - less flowing water (current transistor).This mode of operation is called amplifying transistor when using a small voltage applied to the base, you can manage large current is removed from the reservoir.
In conclusion, it should be noted that the transistors can be of different types, all determined by the material used in the manufacture.They may vary in power, can manage and pass through a considerable flow of electric current.The transistors may be of different design freedom.There are other modes of transistors differing from those considered here.But the basic idea of how the transistor is given above.
All stated about, but still allows you to understand the operation of the transistor.In fact, the work of the transistor is much more complicated.There are special settings, which can use the formulas to calculate and set the desired mode, but that's another topic for conversation for another article.
