Transistor Types And Functions Pdf
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They are used in a variety of circuits and you will find that it is rare that a circuit built in a school Technology Department does not contain at least one transistor. Most circuits tend to use NPN.
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- The Bipolar Junction Transistor (BJT) as a Switch
- Classification and Different Types of Transistors | BJT, FET, NPN, PNP
This page covers practical matters such as precautions when soldering and identifying leads. Transistors amplify current , for example they can be used to amplify the small output current from a logic IC so that it can operate a lamp, relay or other high current device. In many circuits a resistor is used to convert the changing current to a changing voltage, so the transistor is being used to amplify voltage.
Bipolar junction transistors Also known as BJTs can be used as an amplifier, filter, rectifier, oscillator, or even a switch, which we cover an example in the first section. The transistor will operate as an amplifier or other linear circuit if the transistor is biased into the linear region. The transistor can be used as a switch if biased in the saturation and cut-off regions.
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There are many types of transistors in use. Each transistor is specialized in its application. The main classification is as follows. Let us have a look at the BJTs. This BJT is nothing but a normal transistor. Usually NPN transistor is preferred for the sake of convenience.
Well, with modern-day transistors like the BC, 2n, 2n, etc. For an NPN transistor, it consists of a layer of P-doped semiconductor between two layers of N-doped material, where electrons are passed from the emitter to the collector instead. The emitted electrons are finally collected by the collector and sent to the following part of a circuit. Whereas for a PNP transistor, it consists of a layer of N-doped semiconductor between two layers of P-doped material, where the base current entering into the collector is amplified. Essentially, current flow is still controlled by the base but flows in the opposite direction.
The Bipolar Junction Transistor (BJT) as a Switch
The transistor is an active component and that is establishing all over electronic circuits. They are used as amplifiers and switching apparatus. As the amplifiers, they are used in high and low level, frequency stages, oscillators, modulators, detectors, and in any circuit need to perform a function. In digital circuits, they are used as switches. There are a huge number of manufacturers approximately the world who produces semiconductors transistors are members of this family of apparatus , so there are exactly thousands of different types. There are low, medium, and high power transistors, for functioning with high and low frequencies, for functioning with very high current and or high voltages.
Transistors amplify current, for example they can be used to amplify the small output current from a logic IC so that it can operate a lamp, relay or other high current device. In many circuits a resistor is used to convert the changing current to a changing voltage, so the transistor is being used to amplify voltage.
Classification and Different Types of Transistors | BJT, FET, NPN, PNP
As our brain is made up of billion of cells termed Neurons which are used to think and memorize things. Like as computer also have billions of tiny brain cells named Transistors. It is composed of chemical element extract from sand called Silicon.
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