NPN- Here, a p-type semiconductor is between two n-kind semiconductors. Here, the current enter transistor via emitter and the emitter-base junction is forward and the collector base is reverse biased. The two p- semiconductors are emitter and collector while n-type is the base. PNP- Here, the n-type semiconductor is between two p- kinds of the semiconductor. Mainly there are two kinds of bipolar junction transistors- PNP and NPN. The collector current is equivalent to the saturation current.Ĭut-off region- It is the region in which the transistor is off and the collector current is zero. Saturation region- It is the region where the transistor is on and functions as a switch. There are three regions of operation in bipolar junction transistorĪctive region- It is the region where the transistor remains functional as an amplifier. Moreover, we widely use them in other devices such as mobile, radio transmitter, television, and industrial control. We can use them as amplifiers or switches. The key purpose is to magnify the current. They are available in large quantities and as distinct components. The transistors prepare in two ways- NPN and PNP. It composes of three doped semiconductors like a collector, base, and an emitter that separate by 2 p-n junctions. Construction of Bipolar Junction Transistor It doesn’t need an external source like DC for carrying the amplification. The signal of less amplitude applies to the base becomes available in the amplified way at the transistor collector. Further, the three terminals are collector, base, and emitter. Moreover, it consists of two p-n junctions. The bipolar junction transistor is a current-controlled and 3-terminal semiconductor device. 3 FAQ on Bipolar Junction Transistor Introduction to Bipolar Junction Transistor
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