Why are NPN transistor preferred over the PNP transistor?

The majority charge carriers in an NPN transistor are electrons and the majority carriers in a PNP transistor are holes. The electrons have better mobility than holes. Therefore, NPN transistors are preferred over PNP transistors.

Why we use NPN transistor to amplifier?

A transistor acts as an amplifier by raising the strength of a weak signal. The DC bias voltage applied to the emitter base junction, makes it remain in forward biased condition. This forward bias is maintained regardless of the polarity of the signal.

How NPN transistor is more good as compare to PNP?

NPN transistor more preferred as compared to PNP because we know that in PNP, holes are the majority charge carriers whereas, in NPN, electrons are the majority charge carriers. So, the holes’ mobility is not sped as compared to the electrons mobility.

What does a NPN transistor do?

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.

Which transistor is used in amplifier NPN or PNP?

The main difference between the two types of transistors is that holes are the more important carriers for PNP transistors, whereas electrons are the important carriers for NPN transistors. Then, PNP transistors use a small base current and a negative base voltage to control a much larger emitter-collector current.

How use NPN transistor as PNP?

For example, if you build a simple current generator with a transistor and a few resistors (base divider, emitter resistor and load on the collector), then to change npn to pnp, with the same power supply, you need to put in the transistor with C and E mirrored, and mirror the resistors as well (or otherwise.

What are NPN transistors used for?

NPN transistors are used in amplifying circuit applications. NPN transistors are used in the Darlington pair circuits for amplifying weak signals. NPN transistors are used in applications we need sinking current. NPN transistors are used in some classic amplifier circuits, the same as ‘push-pull’ amplifier circuits.

What is the difference between NPN and PNP transistors?

An NPN transistor has a piece of P-type silicon (the base) sandwiched between two pieces of N-type (the collector and emitter). In a PNP transistor, the type of the layers are reversed. NPN and PNP transistors have very similar schematic symbols. The only difference is the direction of the arrow on the emitter.