How does current flow through a NPN transistor?
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How does current flow through a NPN transistor?
The NPN transistor is designed to pass electrons from the emitter to the collector (so conventional current flows from collector to emitter). The emitter “emits” electrons into the base, which controls the number of electrons the emitter emits.
Why we keep base very thin and lightly doped explain working of NPN PNP transistor?
The base region in a transistor is made very thin so that there is a better conduction of majority carriers from emitter to collector through base. The base region in a transistor is doped lightly so that the number density of majority carriers (electrons in p-n and holes in n-p-n transistor) is low. …
Why is conduction through the forward biased junction of an NPN transistor primarily in one direction namely from the emitter to base?
Why is conduction through the forward-biased junction of an NPN transistor primarily in one direction, namely from the emitter to base? Because the N material on one side of the forward-biased junction is more heavily doped than the P-material.
Which way does conventional current flow in a PNP transistor?
Explanation. Conventional current in a PNP transistor flows from EMITTER to BASE. Note: In an NPN transistor it would be collector to emitter.
How can an NPN and PNP transistor be properly biased?
The correct biasing point for a bipolar transistor, either NPN or PNP, generally lies somewhere between the two extremes of operation with respect to it being either “fully-ON” or “fully-OFF” along its DC load line. This central operating point is called the “Quiescent Operating Point”, or Q-point for short.
What electronic function does the transistor carry out quizlet?
Terms in this set (126) State three ways in which transistors are used. Transistors are used in three ways, to act as amplifiers to increases voltage or current, to be used as switches to turn off and on current, and to act like variable resistors to make the current flow very.
Where does current flow in a BJT?
A bipolar junction transistor (BJT) has three terminals, called base, collector, and emitter. The BJT exhibits a tremendously useful property: a small current flowing into the base causes a much larger current to flow into the collector.
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