![]() The complete emitter current flows through the collector current I C. The holes which collect around the depletion region when coming under the impact of negative polarity collected or attracted by the collector. in this video let's look at the circuit symbol of a transistor we've already seen that there are two kinds of transistors one is the NPN where a p-type is sandwiched between two n types and we also have a PNP transistor where a P an n-type is sandwiched between two P types and in the previous video we even saw what their names are the different regions have their own different names we call. Hot Network Questions Can I just convert everything in godot to C Can I build a RAID 5+1 system How to know if a seat reservation on ICE would be useful Alternative to stuff. The collector base region is connected in reverse biased. PNP transistor symbols, pins and footprints. Hence only a few holes combined with the electrons and the remaining are moved towards the collector space charge layer. The base of the transistor is thin and very lightly doped. When these electrons move into the N-type semiconductor material or base, they combined with the electrons. These holes constitute the emitter current. The emitter-base junction is connected in forward biased due to which the emitter pushes the holes in the base region. 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 PNP transistor symbol is shown in the above figures where the arrow mark shows that the flow of current will be from emitter terminal to collector whereas. 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. This helps a lot while solving numerical problems. One thing to note here is the current direction in both NPN and PNP transistors. The letter of the PNP transistor indicates the voltage requires by the emitter, collector and the base of the transistor. The symbol of the PNP transistor is the same as fig. ![]() ![]() 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. ![]()
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