![]() ![]() And the base-emitter is kept in forward due to which the holes from the emitter region enter into the base and then into the collector region by crossing the depletion region. The base of the transistor is always kept positive with respect to the collector so that the hole from the collector junction cannot enter into the base. The emitter which is connected in the forward biased attracts the electrons towards the battery and hence constitutes the current to flow from emitter to collector. The emitter-base junction is connected in forward biased, and the collector-base junction is connected in reverse biased. The construction of PNP transistor is shown in the figure below. The inward arrow shows that the direction of current in PNP transistor is from the emitter to collector. The symbol of PNP transistor is shown in the figure below. The current which enters into the base is amplified into the collector ends. In PNP transistor, the electrons are taken from the base terminal. The base of the PNP transistor has always been negative with respect to the emitter and collector. The letter of the PNP transistor indicates the voltage requires by the emitter, collector and the base of the transistor. The direction of current in PNP transistor is from the emitter to collector. The PNP transistor turns on when a small current flows through the base. ![]() The current inside the transistor is constituted because of the changing position of holes and in the leads of the transistor it is because of the flow of the electrons. The hole is the majority carriers of the PNP transistors which constitute the current in it. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |