Npn transistor: Learn how NPN transistor works

Learn how NPN transistor works as a bipolar junction device with three terminals: emitter, base and collector. Find out the input and output characteristics, current gain, and examples of NPN transistor circuits. Bipolar Junction Transistor NPN transistor When a single p-type semiconductor layer is sandwiched between two n-type semiconductor layers, an npn transistor is formed. NPN transistor symbol The circuit symbol and diode analogy of npn transistor is shown in the below figure. In the above figure, it is shown that the electric current always flows from p-region to n-region. NPN transistor construction The npn transistor is made up of three semiconductor layers: one p-type semiconductor layer ... A SIMPLE explanation of a NPN Transistor. Learn what a NPN Transistor is, how it works, its symbol, and a NPN Transistor circuit. We also discuss how ... NPN Transistor – BJT Transistor Construction, Working & Applications as Inverter, Switching & Amplifier When a third doped element is added to a diode in such a way that two PN-junctions are formed, the resulting device is called a transistor. Transistors are smaller than vacuum tubes, and were invented by J. Barden and W.H. Brattain of Bell Laboratories, USA.