There are two kinds of transistor: Bipolar Junction Transistors (BJTs) and Field Effect Transistors (FETs). These two transistors work in two different ways. However, both types of transistors are based on the fact that when a voltage is applied to impure semiconductor such as Silicon, it changes from a conductor to an insulator or vice versa.
Field Effect Transistors contain a narrow conductive channel which passes near a "Gate" electrode. The two ends of this channel are connected to terminals called "Source" and "Drain." When a voltage of the correct polarity is applied between the Gate and the transistor channel, the channel becomes wider, and if this polarity is reversed, the conductive channel narrows, or it even vanishes entirely. By changing the size of this conductive channel, the FET behaves as a voltage-controlled valve or switch. Since the Gate does not require any continuing current, the FET operation can be improved by including a layer of insulating glass (Silicon oxide) between the gate electrode and the rest of the transistor. This type of FET is called a "MOSFET," for Metal-Oxide-Semiconductor layers. Transistors without the glass layer are called JFETs or "Junction-FETs."
Bipolar transistors are composed of three segments called "Collector," "Base," and "Emitter." A thin insulating layer arises naturally between Base and Emitter. If a voltage of the correct polarity is applied to the Base and Emitter terminals, the insulating layer becomes so thin that it behaves as a conductor. If this voltage polarity is reversed, the insulating layer becomes wide. By changing the thickness of this insulating layer, the BJT behaves as a voltage-controlled valve or switch. HOWEVER, whenever the Base-Emitter voltage is causing the insulator layer to become thinner, there also is a leakage current in the base terminal. This tiny current is proportional to any larger current passing through the entire transistor. Although the BJT is controlled by the voltage between Base and Emitter, designers usually ignore the base-emitter voltage, and the BJT is treated as a current-controlled valve or switch.
All transistors are made of a "doped" semiconductor, typically silicon. Pure silicon contains almost no movable charges, so it behaves as an insulator. To create transistors, the silicon crystal has impurities deliberately introduced during manufacture. Each impurity atom will "donate" a movable charged particle in the silicon, which changes the silicon into a conductor. Doped silicon is very different than metal conductors. The charges within metals behave like a dense liquid, while the charges in doped silicon behave as a highly compressible gas. Doped semiconductor is a special kind of conductor where an externally-applied voltage can easily "compress" or sweep the charges away. By sweeping the charges away, the semiconductor is changed from a conductor back into an insulator. Semiconductors are like electric switches or valves, but with no moving parts.
The work of a transistor is to amplify the input signal to get high output value.
To learn how a bc547 transistor works, check out the related link below.
Two diodes, whether or not discreet, cannot work together as a transistor. The diodes and transistor have different profiles to optimize them for their specific functions
The current you set it to work at. Using for example resistors you can set the voltages and currents at a certain DC level. At that point the transistor will work. It is mostly (but not always) used to put the transistor in its linear region.
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work like on off switch!!
A Darlington transistor it may contain one or more transistor in its case. the purpose is to amplify current by beta multiplication.
The point-contact was the first device marketed, following Bardeen and Brattain's patent in 1948, and parallel work by Welker and Matare in France.The Nobel Prize was awarded to Bardeen, Brattain and Shockley - although Shockley had not been a major part of the point-contact work.The junction transistor *principle* was patented by Julius Lilienfeld in 1928.Shockley patented the junction transistor in 1948, soon after Bardeen and Brattain.
the transistor is called as transistor because there is transfer of resistance from input to output .transfer resistance so it is transistor.
transistors work on dc not ac however they can have ac signalss fed into them
Transistor works as amplifier,oscillators,switch only when it is biased properly.biasing can be defined as how much amount of voltage that has to be supplied to each junction of the transistor in order to make it work as any one of the above given types.biasing voltage can be decided by seeing the V to I graph of a transistor
A: Actually a transistor have two diode with the base mas a common terminal. the characteristics of these tow diodes however are not the same as a common diode
A silicon transistor is a transistor made of silicon.
It won't work.
A transistor is a device used to switch power between electrical components. Transistors work to amplify existing signals as well as open and close circuits.
What is a 2N2369 transistor.It's an npn switching transistor.
I can give you several sentences.I bought a transistor radio.The transistor amplified the signal.We studied the transistor in science class.
Similar to a 2N3906 PNP transistor
what is load line of transistor what is load line of transistor
A Unijunction Transistor is a transistor that acts solely as a switch.
what is the similar transistor to ut5352?(t803800w)
a transistor that is not active