The complete free Course about the MOSFET/Transistor MOSFET| working principal circuit diagram applications types and measurement

A mosfet or a mosfet transistor is an electronic component, which can be classified from standard AES. In our topic today, we will address, God willing, a comprehensive explanation and clarification from all sides regarding the mosfet. Of course, as we are used to the topics of the Electronics Professional Space Blog, we start our blogging by putting the titles of the paragraphs that we will address so that we can understand the general idea well. So we ask this question in order to build the article on it. What is mosfet?

In this Topic we will see

Mosfet function
Mosfet types
P-channel mosfet
N-channel mosfet
Mosfet examination
Mosfet measurement
Obtaining a suitable replacement

The difference between MOSFET and Transistor MOSFET

Before we proceed to the topic, here are these pictures so that it is easier for you to understand the meaning and the general idea during the explanation

A diagram of the Mosfet on the computer processor diagram

مخطط الموسفت

Definition of mosfet


The mosfet, my beloved, is among the common and important electronic components in the world of technology as all electronic devices are not devoid of it. The mosfet is completely like a transistor in principle, but there is a slight difference in terms of function in addition to the nomenclature used to classify the sides of each of them. In the transistor we find the rule The collector and emitter, while in the mosaf we find the gate, source and downstream. On each we will know everything in detail below

ترانزيستور موسفت

Mosfet function

The uses of the mosfet are many, depending on the purpose and the result that we want to obtain, but the normal use of it is to use it as a switch or as a transformer for power or an electrical signal, proportionally. Don't worry my brothers, I'll explain everything

The mosfet can transfer the signal or electrical effect from its downstream, or what is called the drin to the source or the source, and that when the activation signal reaches the gate or its kite, and it can transfer the same energy in the opposite direction, i.e. from the source to the two dens and what controls the direction of determination It is the type of the array, is it n-channel or p-channel? At that time it is called a switch, meaning it acts as a breaker, transforming the signal by order of the kite. As for its other function, which is to convert the electrical signal from the drain to the source in the case of the p-channel, this conversion is Either reduce the value of that signal or raise it according to the signal that comes from the gate, which it receives in turn from Essy Control, which controls all the transmitters or channels.

Mosfet types

There are simply two known types, the first type is called p-channel and it converts the electrical effect or the electrical signal from the two drains to the source by order of the kite of course, and the second is called the n-channel and does the opposite, that is, the conversion of the electrical signal from the source to the two drains. Changing the first type to the second type during maintenance or vice versa, otherwise it will cause damage to the two devices.

The correct way is to replace the type of array with the same type that it fits, i.e. replace a damaged p-channel with another good p-channel and replace n-channel with n-channel. For reference, all of them can be used as well either in switching the power or data, so you will hear about the power array and the data array In the following, we will learn about each type separately

The p-channel array

As we said, in this latter the passage of the electrical signal from the two drains to the source, and what controls this is the positioning of the diode inside the array, so that the anode or the positive terminal of this diode is connected to the two drains, while the negative side or the so-called cathode is connected to the source, and here is the illustration

P-channel MOSFET

p-channel موسفت

The n-channel array

Exactly the opposite with regard to the n-channel mosfet, where the electrical signal passes from the source to the two drains, and of course this is due to the connection of the diode's anode to the source and its cathode link, which we said represents the negative side in the two drains. To the cathode. The following diagram of the n-channel array illustrates this

N-channel MOSFET

n-channel موسفت

Mosfet examination

So my brothers, as you know, the mosaic is examined before starting to take any measurements, that is, when we take the motherboard of the computer that has a malfunction, for example, we do not start in random measurements directly, but we do a visual inspection of all the components of that board, including monitors, acehs, capacitors, and so on. Of course, for each electronic component. His method of examination, what we are interested in is to clarify the method of examining the mosaic, which is as follows: Look at his body, if possible, using a magnifying glass to be better and check the following:

- I have all his legs there, meaning one is not missing and well sliced

Note that the back of the mosfat is safe, meaning that there is no damage from burning, perforation, or other defects.

Mosfet measurement

As for measuring it, my beloved, based on its diagram, you will conclude the method of measurement, as indicated by the mosfet, it has one diode inside. So we will use a multimeter or avometer to measure it by making 6 measurements on it. If we get one reading from among the six measurements that we have taken, it is interesting. If we got more than one reading or short during the measurement, then this is inevitably clear evidence of its damage.

It is advisable to do these measurements after removing the amplifier from the board to avoid reading errors

Determine the malfunction of the mosfet

As for determining the malfunction, it will be easy for us as long as we have previously known the method of examination and the method of measuring the mosfet, whether we will add some other things that indicate an explicit malfunction with the latter.

Defining the malfunction is as follows:

Either by noticing the presence of burn marks or swelling on the back of the mosfet, or the presence of an unusual problem on its three or eight legs depending on its type, either an echo on it or the loss of one of them.

The third thing that usually happens is the presence of heat or an unusual temperature on the body of the mosfet while touching it, and this is an explicit evidence of its damage, and it is advisable to change it in this case.

Learn about Ace Mosfet

I chose to talk about this point, as during maintenance, we find very many ice bars on the board with the same number of legs and the same shape and size, so we should be logical to determine whether this isy that we are about to examine is Mosaf or not, how is that?

Simple by adopting two methods:

That we write a reference or the numbers of the Mosfet on it in one of the site that gives information and data sheet electronic elements and among those sites that I personally use alldatasheets. Or you can simply search for an alternatives site

The second way is by doing some measurements. As you know most often the eight-legged mosfat has four legs connected between them and it represents the two legs, and by using the meter on the position of the bell, we get a ring or a button between them. While we find the other third that bears the numbers 1, 2-3 It is the source and it is also connected with each other, and of course it gives a ring or buzzer when we use the avometer on the bell position, and the fourth party is a gate or kite.

Obtaining a suitable Mosfet replacement

Of course my brothers, getting a suitable alternative is not an easy task, as it requires some research and patience. On all, there are sites that suggest alternatives to the mosaic, of course, after you enter a reference and some of its properties, but there is a traditional method that can be used which is to compare the datasheet of the damaged array and the mother sheet of whom you suspect is a suitable alternative so that you compare each of their types is it p channel or n channel where as We said that the n-channel mosfet should never be replaced by the last p-channel, and vice versa, as well as their maximum voltages and the temperature that each of them can handle, and other than that.

The difference between mosfet and transistor mosfet

Of course, among the questions that arise a lot is, what is the difference between a mosfet and a transistor, they are in fact the same thing, meaning the first is synonymous with the second. The difference that we can talk about is between the mosfet and the transistor, and I think I explained that in the second paragraph, and there is no need to repeat it.

So, dear fans and followers of the Electronic Professional Space Blog, I hope that this topic will appeal to you, especially since the topics of explaining mosfet in Arabic professionally are few compared to the explanation in foreign languages