What Is an NPN Transistor?

The transistor is composed of three parts of semiconductors forming two PN junctions, and its composition forms are PNP type and NPN type. The germanium triodes produced in China are mostly PNP type, and the silicon triodes are mostly NPN type. Their structural principles are the same. The triode has three regions and three electrodes. The base region (a thin semiconductor in the middle of the triode) leads to the base b; the emitter region e leads to the emitter e on the two sides and the collector c leads to the collector region. The PN junction between the transmitting region and the base region is called the transmitting junction, and the PN junction between the collector region and the base region is called the collector junction. On the circuit symbol, the arrow of the PNP tube emitter points inward, and the arrow of the NPN tube emitter points outward, indicating the direction of the current.

NPN transistor

discuss

The transistor is composed of three parts of semiconductors forming two PN junctions, and its composition forms are PNP type and NPN type. The germanium triodes produced in China are mostly PNP type, and the silicon triodes are mostly NPN type. Their structural principles are the same. The triode has three regions and three electrodes. The base region (a thin semiconductor in the middle of the triode) leads to the base b; the emitter region e leads to the emitter e on the two sides and the collector c leads to the collector region. The PN junction between the transmitting region and the base region is called the transmitting junction, and the PN junction between the collector region and the base region is called the collector junction. On the circuit symbol, the arrow of the PNP tube emitter points inward, and the arrow of the NPN tube emitter points outward, indicating the direction of the current.

Chinese name

NPN transistor

Make up

Three-part semiconductor

Introduction:

The structural principle is the same

Base area

Lead out base b

Introduction

The transistor is composed of three parts of semiconductors forming two PN junctions, and its composition forms are PNP type and NPN type. The germanium triodes produced in China are mostly PNP type, and the silicon triodes are mostly NPN type. Their structural principles are the same.

The triode has three regions and three electrodes. The base region (a thin semiconductor in the middle of the triode) leads to the base b; the emitter region e leads to the emitter e on the two sides and the collector c leads to the collector region. The PN junction between the transmitting region and the base region is called the transmitting junction, and the PN junction between the collector region and the base region is called the collector junction. On the circuit symbol, the arrow of the PNP tube emitter points inward, and the arrow of the NPN tube emitter points outward, indicating the direction of the current.