There is one P-N junction between the emitter and the base area, and another between the collector and the base region. It is a current-driven device that has two P-N junctions within a transistor. The collector in a PNP type transistor is P-type, so it gets holes charges, but the collector in an NPN type transistor is N-type, so it receives electrons charges. Because the collector-base junction is always in reverse bias, it has an extremely high resistance. However, because base-collector junctions are short-circuited, they have a high resistive path.ДЇor PNP transistors, the base is in N-type and for NPN transistors, the base is in P-type.Д¬ollector: The collector is the part on one end of the other side. Because the base-emitter is driven forward, it has an extremely low resistance path. As in NPN, a high amount of electrons move to the base.Д«ase: The base of a transistor is the central region that receives the majority of holes or electrons from an emitter. The emitter-base junction of a PNP transistor is forward biassed, and the emitter supplies a high number of holes in the base. An emitter is always in advancing bias with a base, supplying a high quantity of holes or electrons to the base. If the transistor is of the NPN type, the emitter contains electrons. If there is a PNP-type transistor, the emitter is a p-type semiconductor diode with holes. Let us go through all of their terminals in detail.Д®mitter: The part on one side of a transistor that transports electrons or holes. Similarly, a PNP transistor has one layer of N-type material and two layers of P-type material.ДЄ transistor has three terminals: emitter, base, and collector. NPN transistors have two layers of N-type semiconductor material and one layer of P-type semiconductor material. NPN transistors and PNP transistors are the two kinds of transistors. The base-emitter joint is forward biased, whereas the base-collector joint is reverse biased. When current passes via the base-emitter junction of the transistor, current flows in the collector circuit.

There is a p-n joint between the base and the emitter, and another between the base and the collector. The transistor has three terminals: the base, the emitter, and the collector. In other terms, it is a switching device that controls and amplifies electrical signals such as voltage or current. The term вЂtransвЂ™ refers to transfer while вЂistorвЂ™ refers to the resistance properties provided by junctions.

To address this issue, three American scientists, John Bardeen, Walter Brattain, and William Shockley, invented the transistor in 1947.ДЄ transistor is a semiconductor device that allows a weak signal to be transferred from a low resistance circuit to a high resistance circuit. Considerable power consumption meant high heat generation, which shortened the tubeвЂ™s life owing to its low efficiency. This tube was used to regulate the electric current. TransistorДЄccording to the history of electronic devices, one of the most essential components of these gadgets was a vacuum tube. The collector current is large compared to the base current.Read on, to learn more about transistors, their types like power transistor, construction, working, and uses You will also learn how it differs from a diode. The current flowing by the remaining electrons is known as the collector current I C.

Most of the electrons pass the depletion region of a collector-base junction and pass through the collector region. Typically, it is 2-5% of the total emitter current. The base current is very small compared to the emitter current. Hence, most of the electrons will pass the base region and few of them will recombine with the holes.Д«ecause of the recombination, the current will flow through the circuit and this current is known as base current I B. So, it has a few holes to recombine with the electrons. But the base region is very thin and lightly doped. These electrons move further to the base. This current is known as emitter current I E. And because of electrons, the current will start flowing the emitter-base junction. Therefore, electrons start flowing from N-type emitter to a P-type base. In N-type emitter, the majority charge carrier is electrons. The depletion region of the emitter-base region is thin compared to the depletion region of the collector-base junction (Note that the depletion region is a region where no mobile charge carriers are present and it behaves like a barrier that opposes the flow of the current).

Transistor definition