0
on or off
Joel Labadie
Wiki User
∙ 15y agoboth NPN and PNP transistors consist of three regions- collector, base and emitter.
the can use a transistor as a switch using the property that whenever there is a current flowing from the base to the emitter(or emitter to base in case of PNP), and a potential drop across collector-emitter region(across emitter-collector region in case of PNP), then the collector-base-emitter give a very low resistance(in ideal case, shorted) and if there is no current flowing from base to emitter region(emitter to base in case of PNP), then collector-base-emitter will give a very high resistance(in ideal case, open).
in order to use a transistor as a switch, we connect the end points of the switch to collector and emitter...and whenever we give a pulse of current of required magnitude and polarity, the transistor will allow current through it and else will remain off.
Wiki User
∙ 14y agoTransistors are crucial components in virtually every piece of modern electronics, and are considered by many to be the most important invention of the modern age (as well as a herald of the Information Age).
Wiki User
∙ 12y agoBecause a transistor's collector current is proportionally limited by its base current, it can be used as a sort of current-controlled switch. A relatively small flow of electrons sent through the base of the transistor has the ability to exert control over a much larger flow of electrons through the collector.
Wiki User
∙ 8y agoThe current passes from the emitter to the collector through the base. Changes in the voltage connected to the base modify the flow of the current by changing the number of electrons in the base. In this way, small changes in the base voltage can cause large changes in the current flowing out of the collector.
Wiki User
∙ 13y agoThe function of any transistor is to use small electrical currents
to control larger currents.
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Why are npn transistors used more often than pnp transistors?
The primary reason that NPN transistors are used more often than PNP transistors is that they usually operate faster (at higher frequencies) because the mobility of the current carriers in NPN transistors (electrons) is much higher than that of the current carriers in PNP transistors (holes).
How many pn junction does transistor contain?
Two, either in NPN or PNP transistors
What is difference between npn ans pnp transistor?
NPN and PNP transistors function in essentially the same way. The power supply polarities are simply reversed for each type. The only major difference between the two types is that the NPN transistor has a higher frequency response than the PNP-because electron flow is faster than hole flow. Therefore high frequency applications will utilize NPN transistors.
Why is NPN transistor a straight switch and Why is PNP transistor an inverted switch?
npn and pnp transistors have the same operation as one another, they are both switches, pnps may be known as inverted switches because they work on negative voltage supplys and not positive voltage supplies.
Is the pnp transistor in common collector can be replaced with npn transistor?
No. The PNP and NPN transistors are exactly opposite each other in polarity. You cannot just replace one for the other without redesigning the circuit.
Why are npn transistors used more often than pnp transistors?
The primary reason that NPN transistors are used more often than PNP transistors is that they usually operate faster (at higher frequencies) because the mobility of the current carriers in NPN transistors (electrons) is much higher than that of the current carriers in PNP transistors (holes).
Which transistoris widely used?
Npn transistors are widely used
What is the difference between BJT and NPN transister?
Mainly there are two types of transistors. They are BJT (Bipolar Junction Transistors) and FET(Field Effect Transisters). In BJT, there are two types called PNP and NPN. Actually NPN means a BJT transister.
What is btj transistors?
They are NPN and PNP. BJT mean bipolar junction transistors. there are two P-N junctions in BJT transisters.
How many pn junction does transistor contain?
Two, either in NPN or PNP transistors
Why you use NPN transistors rather than PNP?
Switching is faster in NPN transistor than PNP. Because movement of electrons is faster than holes.
Can PNP transistors be used in place of TIP31 transistors?
No...TIP31 is NPN. The complementary PNP is a TIP32. They are both large high power (40W) devices.
What is difference between npn ans pnp transistor?
NPN and PNP transistors function in essentially the same way. The power supply polarities are simply reversed for each type. The only major difference between the two types is that the NPN transistor has a higher frequency response than the PNP-because electron flow is faster than hole flow. Therefore high frequency applications will utilize NPN transistors.
Why is NPN transistor a straight switch and Why is PNP transistor an inverted switch?
npn and pnp transistors have the same operation as one another, they are both switches, pnps may be known as inverted switches because they work on negative voltage supplys and not positive voltage supplies.
Is it emitter-base junction should be reversed for both npn and pnp transistors acts as a amplifiers?
no, the emitter base junction should be foward for both npn and pnp to act as amplifiers.
Why you use majority NPN transistor but not PNP transistor?
please send the answer...................... answer: people are positive animals we think positive +5v for instance is the predominate voltage in a computer PNP will work fine on a -5v environment but +5 volt is here to stay so NPN transistors are predominate
Transistors Basic material of?
silicon ang germanium there are two types of transistor \ 1. PNP 2. NPN silicon ang germanium there are two types of transistor \ 1. PNP 2. NPN
