60158

Series:	--
Part Status:	Obsolete

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Introduction

The type of transistor known as a "bipolar junction transistor" (BJT) is the most widely used type of transistor, and the 60158 is one such type. The BJT is constructed out of three, interconnected semiconductor components - a collector, base and emitter, and a bias voltage applied between the base and emitter controls the flow of current across the emitter and collector. In the case of a 60158, the type of BJT is specifically designed for radio-frequency (RF) applications, due to its ability to operate at higher frequencies than a conventional BJT.

Construction of the 60158

The 60158 is constructed from a few, standard components, with the primary component being a two-layer NPN silicon transistor. This component is placed within a small, rectangular-shaped package with three leads - collector (C), base (B) and emitter (E). The package itself is made from glass-filled thermoplastic or ceramic, and is known as a "dual in-line" (DIL) package.The component package includes a collector layer, a base layer and an emitter layer, all of which are separated by an insulating material. The collector and emitter layers are both connected to the base layer via an N-type region, while the emitter layer is further connected to the collector layer via a P-type region. The connections between the layers create an NPN transistor, which is the primary component of the 60158.

Working Principle of the 60158

The main function of an NPN transistor is to control current flow from the collector to the emitter, and it does this by applying a bias voltage between the base and emitter. When the base-emitter voltage is increased above a certain threshold voltage (VBE), a small electric current that is called a "base current" (IB) is established between the base and emitter. This base current then flows into the emitter and creates a larger current (which is called a "collector current" or IC) flowing from the collector to the emitter.In the case of a 60158, the current flow is further amplified due to its higher frequency operation, allowing it to be used as a radio-frequency amplifier. The way this works is that the base-emitter voltage not only controls the current flow within the base-emitter junction, but also controls the amount of charge that is stored on the two layers of the transistor. This stored charge then alters the electrical resonance within the device, enabling it to operate at its maximum frequency.

Conclusion

The 60158 is an example of a NPN transistor specifically designed for radio-frequency applications. It is constructed from two layers of silicon and a glass- or ceramic-filled package. The working principle revolves around the base-emitter voltage, which initiates a base current when it reaches a certain threshold. This allows the 60158 to supply a larger collector current than a standard transistor and to operate at higher frequencies. This makes it an ideal choice for a range of radio-frequency applications.

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