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五、晶体三极管 1.基本概念晶体三极管是一种具有两个PN结的半导体器件,它又可分为NPN型和PNP型两大类。每一类都分成基区、发射区和集电区,分别引出基极(b)、发射极(e)和集电极(c)。每一类都有两个PN结,基区和发射区之间的结称为发射结,基区和集电区之间的结称为集电结,其结构示意图和表示符号分别如图125和图126所示。国产硅管(如3D系列)多为NPN型,锗管
Fifth, the transistor 1. Basic concepts Transistor is a semiconductor device with two PN junctions, it can be divided into two categories NPN and PNP. Each category is divided into base, emitter and collector regions, leading to base (b), emitter (e) and collector (c), respectively. Each class has two PN junctions, the junction between the base and the emitter is called the emitter junction, the junction between the base and the collector is called a collector junction, and its structure diagram and representation symbols are shown in Figure 125 And Figure 126. Domestic silicon tube (such as 3D series) mostly NPN type, germanium tube