Triodes: Three-Element Electronic Components for Amplification and Switching

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Small signal transistor

Small-signal transistors are generally divided into three categories: switching transistors, dual transistors, and transistors. They are semiconductor components that control current to amplify weak signals into larger electrical signals. They are often used for non-contact transistor conversion.
The middle part is the base region, and the two sides are the emitter region and the collector region. The arrangements are PNP and NPN. In an NPN transistor, electrons move from the emitter region to the collector region, thereby forming a current in the transistor. Small-signal transistors are mainly used in signal amplification, switch control, analog circuits, regulated power supplies and other fields, and have broad application prospects and market demand.

Digital Transistor

A digital transistor is a transistor with a resistor. There are mainly single-stage transistors, insulated gate field effect transistors and junction field effect transistors. They are characterized by high input resistance, low output resistance, small size, and low power loss. They are often used in electronic switches, amplifiers, filters, oscillators and other applications.

power transistor

A power transistor is a three-terminal device composed of semiconductor materials. It has emitter, base and collector terminals.
One of them is the control pole. By applying a current or voltage signal to the control electrode of the device, the current flowing through the output electrode can be controlled. This device is mainly used to control the large current and voltage range of electrical equipment. In power electronic circuits, power transistors are primarily used as switches and sometimes as power amplifiers. It is a high-power fast solid state switch with excellent performance.

Power switching transistors

Power switching transistors refer to transistors that can withstand large currents, have small leakage currents, and have good saturated conduction and cutoff characteristics under certain conditions. Switching transistors have the characteristics of long life, safety and reliability, no mechanical wear, fast switching speed, and small size. Small features.
Switching transistors can use very small currents to control the on and off of large currents, and are widely used. Low-power switching tubes can be used in power supply circuits, drive circuits, switching circuits, etc.; high-power tubes can be used in switching power supplies for color TVs and communication equipment; they can also be used in low-frequency power amplification circuits, current adjustment, etc.; high-back-voltage high-power switches The tube can be used in color TV line output tubes.

Darlington tube

Darlington pipe is also called compound pipe. He connected two triodes in series to form an equivalent new triode. The magnification of this equivalent triode is the product of the original two, so it is characterized by very high magnification. The role of Darlington tubes is generally to amplify very small signals in highly sensitive amplification circuits, such as high-power switching circuits. In electronics circuit design, the Darlington connection is often used in power amplifiers and regulated power supplies.

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