What is the working principle of NPN transistor?
What is the working principle of NPN transistor?
The NPN transistor amplifies the weak signal enter into the base and produces strong amplify signals at the collector end. In NPN transistor, the direction of movement of an electron is from the emitter to collector region due to which the current constitutes in the transistor.
What is the theory of transistor?
The Theory: A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal.
What is BC547 NPN transistor?
BC547 is a bipolar junction transistor (BJT). It is kind of an NPN transistor. It has three terminals: Emitter, Collector and Base. The maximum current gain of BC547 is 800A. The Collector−Emitter Voltage is 65V.
How NPN transistor is formed?
When a single p-type semiconductor layer is sandwiched between two n-type semiconductor layers, an npn transistor is formed.
Why NPN transistor is mostly used?
The flowing of these electrons from emitter to collector forms the current flow in the transistor. Generally the NPN transistor is the most used type of bipolar transistors because the mobility of electrons is higher than the mobility of holes. The NPN transistor is mostly used for amplifying and switching the signals.
What’s the difference between PNP and NPN 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.
What is the difference between BC547 and BC548?
In most cases you could. BC547 and BC548 are essentially the same but BC547 has a higher breakdown voltage whereas BC548 has low noise. These are the most general purpose NPN silicon transistors and changing one with the other does not noticably (or otherwise) affect the circuit.