12/15/2023 0 Comments Iv characteristics of bjt transistor![]() ![]() ![]() So, the resistance provided by the collector also gets reduced. ![]() In the transistor, if the collector current increases, then the collector junction temperature will increase. All other working principles and their doping ratio will remain the same for both NPN and PNP transistors. The majority charge carriers of NPN transistors are electrons and the majority charge carriers of PNP transistors are holes. The only major difference between the NPN and PNP transistors are their majority charge carriers. Generally, the base current I B will remain small when compared to the emitter current I E and the collector current I C Then the remaining large number of electrons in the emitter will cross the reverse-biased collector junction in the form of collector current.Īccording to Kirchhoff's Current Law, the emitter current is equal to the sum of collector current and base current. Usually, the direction of conventional current flow will remain opposed to the flow of electrons. The recombination of holes in the base with electrons in the emitter region will constitute the flow of the base current. Usually, the base of NPN transistors are thin and lightly doped, so it has fewer holes while compared with the electrons in the emitter. The forward biased BE junction will reduce the barrier potential and help the current to flow from the emitter to the base. So, the width of the depletion region of the base-emitter junction is small, while compared to the width of the collector-base junction. Here, the base-emitter junction is forward biased and the collector-base junction is reversed biased. The NPN transistor is a biased active region. In the common base characteristics, the base of the transistor is grounded, then the emitter turns as input and the collector turns as output. The right side diode is known as the collector-base diode.īipolar Junction Transistor ConfigurationsĪ BJT can be configured into three types, they are a common collector configuration, common base configuration and common emitter configuration. In the PNP transistor, the left side diode is known as the emitter-base diode. So, the transistors look like two crystal diodes connected in series. Usually, the p-n junction is considered a diode. The PNP transistors are mainly used to control current flow through the circuit. In PNP transistors, one n-type semiconductor is sandwiched between the two p-type semiconductors and creates two p-n junctions. In the NPN transistors, the current flow will be usually from the emitter to the collector region. These NPN transistors are widely used in many electronic devices, mainly to amplify weak signals. In NPN transistors, one p-type semiconductor is placed between two n-type semiconductors and it forms the two p-n junctions. Let us understand these types of transistors in detail. They are PNP transistors and NPN transistors.īJTs are classified into two types, PNP transistors and NPN transistors. In BJT, only less current will flow between base and emitter terminals and a larger current will flow between collector and emitter terminals.īased on the doping BJTs are mainly classified into two types. The three terminals are namely, base, emitter and collector. Usually, BJTs will have three terminals and two p-n junctions. They are unipolar junction transistors, bipolar junction transistors and field-effect transistors. The transistors are mainly classified into three types based on p-n junctions. The main function of transistors is to regulate and control the flow of current in the electronic circuit. Usually, transistors will act either as a switch or as an amplifier. The transistors are semiconductor devices, which will conduct and resist the electric current and voltage. This article explains transistors and types, characteristics and working principles of BJT and types of BJT in detail. Usually, the BJT transistors do not require any external DC sources. Both the electrons and holes will act as the charge carriers in the Bipolar junction transistor. ![]() They are mainly used as amplifiers or current controlled devices in electronic circuits. Bipolar junction transistor (BJT) is the type of transistor and three-terminal semiconductor device, which has two p-n junctions. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |