In this, between the two layers of N-type semiconductor, there is a layer of P-type material the properties of N-P-N transistor of that type are completely opposite to P-N-P transistor. It is made of two N type and one P-type semiconductor layer. In symbolic representation of P-N-P transistor the direction of arrow is towards inside. In fig l(b), there is a symbolic representation of P-N-P transistor and in fig l(a), there is an equivalent circuit of transistor. In figure 1 (a), there are shown the two junctions of a P-N-P transistor. In this way, we get a P-N junction and an other N-P junction, we can compare a P-N-P transistor with two diodes, whom N-N type semi conductors are jointed, between the two diodes, One is called emitter-base diode or emitter diode and other is called collector base or collector diode. In this type, we add two P-type layers, with the two sides of a N-type layer.
It is made of two P-type layers and one N-type layer. 4 Checking a Transistor Mounted on a Circuit.3.2 Identification of Damaged transistor.3.1 Identification of Germanium or Si transistor.3 Identification of N-P-N and P-N-P transistor.The function of base is to control the collector current. The middle layer between the emitter and collector is called base, which makes two junctions one with emitter and other with collector, the junction between base and emitter is called emitter junction and thatīetween base and collector is called collector junction. The terminal which emits the charge, called a emitter.and that which collect charge is called collector. In both types there are three terminals, namely, emitter, base and collector. On the Basis of construction, there are two types of transistor One transistor transfers the current from low resistance towards high resistance due to this reason it called a transfer of resistor or transistor. In a transistor there yes indeed, are two junctions one provide a very low resistance for current flow and the other provide a very high resistance. There are two junctions in a transistor, so it is called a bijunction or Bipolar transistor. By adding two types of impurities we make two types of semi conductor:īy adding the P and N type semi conductor make a junction and the device called a diode. In pure condition semiconductor is generally non conductor. It (Transistor) is totally an electronic device which is generally made of Semiconductor materials Germanium or silicon. After the invention of transistor there is a treat revolution in Electronics field. Invention of Transistor was done by great American scientist Mr.
0 kommentar(er)
