The structure and types of Pattern Braided Sleeve

Pattern Braided Sleeve, one of the basic electronic devices made of semiconductor materials, have the function of increasing current and are an important component of electronic circuits. The Braided Sleeve is made of two very close PN junctions on a semiconductor silicon wafer. The two PN junctions divide the semiconductor material into three parts. The middle part is the base area, and the two sides are the emitter area and the collector area, there are two arrangements: PNP and NPN. Corresponding electric levels are drawn from the three areas, each of which is the base b emitter e and collector junction c. The PN junction between the emitter area and the base area is called the emitter junction. The PN junction between the electric area and the base area is called the collector junction.

The base area is very thin, while the emitter area is thicker and has a high impurity concentration. The PNP type Braided Sleeve emitter area emits cavitation, and its movement angle is consistent with the direction of the current, so the emitter arrow symbol points inwards; the NPN type Braided Sleeve emitter area emits free The angle of movement of the charge is opposite to the direction of the current, so the emitter arrow symbol points outward. The emitter arrow symbol points outward. The emitter arrow points to the on-off direction of the PN junction under forward voltage. Silicon Pattern Braided Sleeve and germanium Pattern Braided Sleeve are available in two types: PNP type and NPN type.
Common packaging types of Braided Sleeve include metal packaging and plastic packaging. The arrangement of the pins has a certain regularity. The bottom main view is placed so that the three pins form the end points of an isosceles triangle, from left to The right side is the EBC for the low-power plastic Braided Sleeve. Follow the diagram to make the floor plan face toward you, and place the three pins downward. From left to right are the EBC current stages.
There are many kinds of Braided Sleeve with various Patterns in my country, and the pins are arranged in different ways. When using Braided Sleeve with uncertain pin arrangement, you must measure to determine the correct position of each pin, or search for the transistor operation. Manual to establish the performance of Braided Sleeve and the corresponding main parameters and materials.
The alternating current amplification effect of the Pattern Braided Sleeve The Pattern Braided Sleeve has the current amplifying effect. The essence is that the Braided Sleeve can control a relatively large change in the collector current with a slight change in the base alternating current.