منتدى اللغة الإنجليزية بالكلية التقنية بتبوك

بإشراف مشرف اللغة الانجليزية ا/علي المحمدي


    transistor

    Share

    ezaldeen asiry

    Posts : 8
    Join date : 2010-02-04

    transistor

    Post  ezaldeen asiry on Sun Feb 28, 2010 9:35 am

    Transistor (in English: Transistor short for my Transfer Resistor
    resistance means of transport), one of the most important components of modern electronic gadgets like acomputer computer.Invented by U.S. scientists Walter Braaten and John Bardeen and William Shockley.

    #How it works?
    Alosali bipolar transistor or bipolar transistor, which consists of a very thin layer of the type of semiconductor, sandwiched between thicker layers of the opposite type. If the middle class, for example, of the type C, the layers of the type m Aforeigtan. The central region called the base, emitter and regions Aforeigtan compound.
    For the bipolar transistor arrived PG and three parties. And connects two parties of these parties, usually, the emitter and the collector to the Department of Krgip, while many third-party rule Dkhalip Service. Service You Kherjip, but raising the voltage applied to the base a little lead into a large number of electrons across the junction to the base front biased, and this number varies depending on the strength voltages.Because the base area is very thin, can source voltages in the Service Kherjip attract electrons across the junction is inversely biased. As a result, apply a strong current through the transistor, and through the Chamber Kherjip. In this way you can control the flow of a strong current through the circuit Kherjip, to provide a reference base is small.Transistor can be used as a key or like a microphone voltage or current or both.
    Method of examination of the transistor three parties as is well known denoted by C, B, E as shown at the top, and the• transistor of the npn or pnp is a bilateral together Upon inspection must Ijae six tests to ensure the safety of the transistor; first and second: we put index hour examination Ohm Meter on then put the positive wire at the positive terminal of a bilateral (Base) and the negative wire to one end of the hour with bilateral (C) and should give us a small resistance, this is called front-examination, and screening will be back the same way on both sides of the same transistor, but at the heart of wires positive to negative terminal of the transistor on the positive and negative resistance offers a global high Third and Fourth: Examine the party (B) with the other party (E) the same mechanism the previous examination be carried forward and backwards with the same last Mahtrzac earlier
    Fifth and Sixth: Check both sides of the transistor terminal (C) and (E) and front-examination at the heart of the wires on the same parties to become a back examination and gives us a very large resistance in both annual checks.
    Types of transistors Different types of Almqahal (dimensions in centimeters) transistor types:
    bipolar junction transistors: bipolar Mqahl
    field effect transistors: Mqahl fields Newer invented a great revolution in the computer industry as it had to reduce the size of a very high level and increased speed compared to the first generation of computers, which was used as valves or vacuum tubes as elements of the building, capacitors and resistors. The weight, where the first generation of computers to more than 30 tons, while the second generation, and which use the elements Almqahal building reached its size to less than half the first-generation computer in addition to the low temperature that it made compared to his counterpart of the first generation.
    Transistor is made from semiconductors such as gallium, germanium and quartz. It consists of the transistor base (Base) and denoted by the symbol B and the emitter (Emitter) that has the symbol E and the collector (Collector) that has the symbol C, and there are regular transistors are two types, namely: (PG m): if the rule Aforeigtan negative and positive regions. (O PG): if the rule regions Aforeigtan positive and negative. The difference between the first Kharja for electronics and other places through Kharja Alfrgp
    Method of examination of transistors: the three parties to the transistor as is well known denoted by C, B, E as shown at the top, and the transistor (o PG) or the (m x m) is a bilateral together Upon inspection must be conducted six tests to make sure the integrity of the transistor first and second: we put index hour examination to Ohm Meter and then put the positive wire at the positive terminal of a bilateral (Base) and the negative wire to one end of the hour with bilateral (C) and should give us a small resistance, this is called front-examination, and screening will be back the same way on both sides of the same transistor, but the heart of the positive wire at the negative terminal of the transistor to the positive and Third and Fourth: Examine the party (B) with the other party (E) the
    same mechanism the previous examination be carried forward

    Fifth and Sixth: Check both sides of the transistor terminal (C) and (E) and front-examination at the heart of the wires on the same parties to become a back examination and gives us a very large resistance in both annual checks.
    Physical characteristics
    Almqahl a two Mqahl PG Mqahl o C or PG and the symbol m positive or negative Q is evidenced by the type of vaccine to the semiconductor material. Suppose that Almqahl bipolar which will analyze the process of work is C PG. Motivated by the fact that shipments in excess of the negative (electrons) and Rule contain a few of them, a current called the current prevalence of this trend will be towards the bottom of the emitter of it reflected the movement of electrons is from negative to positive. As well as a current of the same type, but because there Agelbiep positive at the base from those in the emitter and then a current bottom-emitter (the direction of positive charge is the direction of the stream). So is the sum of the current macro-Altearien the above-mentioned. Well now go back to the emerging power of the majority in the negative to the radiator where you go that it was continuing Alaktronat Answer Atrigahanho Qaeda and the compound. Due to the existence of some gaps positive it will happen to the few free electrons a union with gaps electron hole recombination and said to a few of the electrons, but not all because the space base that would be very small (al-Qaeda is a slice very thin), and vaccination has been done for the base is not thick not heavily dopent, which does not unite up to the compound and then to the outer circle. And here we must recall that the vaccination of the emitter should be thick but the base is the vaccination less than motivated. And the pool is not to be realized in a restaurant.
    Here we conclude that an increase in vaccination rule lead to warn of gaps and then in the loss of electrons that can transit to the compound and then the outer circle.
    Now that we know about Profile simplified configuration of each layer of the bipolar Almqahl would like to talk about how to use in digital circuits and how it was a quantum leap.

    |||||||||||||||||||||||||||||
    | | | | | | | |
    |||||||||||||| E | | B | | c ||||||||||||||||||||
    |||||||||||||||||||||||||||||
    | |
    Given the form of a decree letters above: will deduce a general law can be used at any stage of the stages of the work is Almqahl: IE = IB IC = motive stream stream stream-Qaeda compound
    What about the stages of work: We have mentioned that Almqahl a PG M PG or R can be considered as a 2 (two) common line, respectively, as Atjihama not behind the positive negative or vice versa.
    Important effort by the parties will change the work of each consolidated basis and get the areas of work:
    1-Saturation
    2-Activity


    Last edited by ezaldeen asiry on Mon Mar 01, 2010 10:42 am; edited 1 time in total

    Re: transistor

    Post  !~<% Sami ALessa 141 %>~ on Sun Feb 28, 2010 6:31 pm

    Arrow Arrow Arrow Thank Arrow Arrow Arrow

      Current date/time is Fri Dec 02, 2016 7:24 pm