PCB News - Active component

Active component

Academically, when electronic components are working, they can be divided into active devices and passive devices according to whether there is a power supply inside them. For some new PCBs, it can also be called active components and passive components. There is not much difference between the two titles.

There are many types of active devices, so let's get to know what are the active devices!

Electron tube
Electron tube is also called vacuum tube, so it is also called electric vacuum device.

Transistor
Belongs to semiconductor devices. A substance whose conductivity is between a conductor and an insulator is called a semiconductor. For example, silicon and germanium crystals are all semiconductors. Therefore, electronic devices made of these crystal materials are called transistors. It is divided into crystal diodes and transistors.

integrated circuit
The circuit, as its name suggests, is to concentrate active devices, passive devices and connecting wires on a small silicon chip, and then through leads and packaging to form a miniature unit with predetermined functions. (The symbol is IC). The advantages of integrated circuits are small size, long life, low cost, high reliability and high performance. At present, integrated circuits and large-scale integrated circuits are more and more widely used.

The above three are our common active devices. In addition to their own characteristics, they also have some common attributes:

(1) It also consumes electric energy.
(2) In addition to the input signal, an external power supply is also required to work normally.

These are some small knowledge of active devices. How to quickly distinguish whether a component is an active device or not? Have you got it?

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