2N7002 TR

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2N7002 TR Application Field and Working Principle

The 2N7002 TR is a field effect transistor (FET) also commonly known as a metal oxide semiconductor FET (MOSFET). The basic operation of a FET relies on the presence of an electric field and is most commonly used as an amplifier, oscillator, and switch to control the flow of electrical current. In this article, the application field and working principle of the 2N7002 TR will be explored in detail.

Application Field

The 2N7002 TR is commonly used in a variety of fields such as audio, radio, and telecommunication, where it can be used as either an amplifier or a switch. In radio applications, the 2N7002 TR is often used as a voltage-controlled oscillator for selective frequency amplification. This allows for the circuits to have pristine signal separation. When used in amplifier applications, the 2N7002 TR can provide a large amount of gain without introducing significant distortion to the signal. Additionally, the 2N7002 TR is often used in logic level conversions, which allows for different logic levels to be converted to one another so they can be properly understood by the circuits.

Working Principle

The main function of the 2N7002 TR is to control the electrical current passing through it. The main difference between the common bipolar transistor and the FET is that the FET does not require a charge carrier to switch off like the bipolar transistor does. The voltage applied on the gate of the 2N7002 TR creates an electric field between the conducting channels. This electric field determines the resistance between the conducting channels and the metal oxide layer. The higher the electric field, the lower the resistance, and vice versa. As a result, the current passing through the FET is controlled by the voltage on the gate. When the voltage on the gate is increased the current through the FET increases as well.

Conclusion

The 2N7002 TR is an essential part of many circuits and applications due to its dual use as both an amplifier and a switch. Its ability to be used in logic level conversions makes it especially useful in more complex circuits. The working principle of the 2N7002 TR is based on the electric field created between the conducting channels and the metal oxide layer. As the voltage on the gate is increased the current passing through the FET is increased as well, allowing for great control of the current.

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