Crystal braided network, one of the basic components of the semiconductor, with current amplification, the core components of electronic circuits. Two PN junctions are divided into three parts, the middle part is the base area, the two sides of the local launch area and collector area, arranged in the form of a PNP PN junction is a semiconductor substrate is made of two very close to the PN junction, And NPN two, from the three regions leads to the corresponding electrode, respectively, the base b emitter e and collector c emitter and base region between the PN junction called emitter junction, between the collector and the base of the PN Results called the collector. The base area is very thin, and the emission area is thick, impurity concentration is large, PNP-type weaving nets launch area "emission" hole, the moving direction and current direction, so the emitter arrow inward; NPN-type braided tube launch area " "Free electrons, which move in the opposite direction to the current, so the emitter arrows outward. Emitter arrows outward. The emitter arrow point is also the PN junction in the forward voltage conduction direction. Both the silicon crystal braided tube and the germanium crystal braided tube are of PNP type and NPN type.

Commonly used braided network management package in the form of metal packaging and plastic packaging two categories, the pin arrangement has a certain law, the bottom view of the location, so that the three pins constitute the isosceles triangle vertex, from left to right Ebc for small and medium-power plastic woven network in accordance with plans to make its plane towards their own, three pins down, then from left to right in order ebc At present, the domestic various types of crystal braided network there are many, the pin arrangement is not The use of uncertain pin arrangement of the weaving nets must be measured to determine the correct location of each pin, or find the transistor manual, clear the characteristics of woven network management and the corresponding technical parameters and information. Crystal Braided Tube Current Amplification Crystal braided mesh tube has the role of current amplification, its essence is the braided mesh tube can be a small amount of change in the base current to control the larger collector current changes.