2N3806

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Introduction

Arrays of bipolar transistors are commonly used in circuit designs to control and route signals and power. The 2N3806 is a commonly used, small-signal, high-frequency bipolar transistor in array form. It is also known as a Darlington pair, a coupling device or an amplifier. The 2N3806 is composed of two bipolar transistors and a resistor, connected in series and physically integrated Into one package.

Application field

The 2N3806 array is suitable for a wide range of general-purpose applications. It can be used as an amplifier for both audio and radio-frequency signals. It is commonly used in radio frequencies for amplification and frequency division. Additionally, it is usable for logic circuits, as well as in power control circuits and high-speed switching applications. The wide bandwidth, low inductance and low noise characteristics of the 2N3806 make it suitable in high-frequency applications, such as those found in radio and television transmission.

Working Principle

The 2N3806 consists of two transistors, each with their own collector, emitter and base pins. The design of the 2N3806 offers advantages in terms of low power dissipation, additional gain and reduced output impedance. It works by combining two transistors into one common emitter configuration. This configuration increases the gain and reduces the output impedance because current flowing through the first transistor is amplified by the second one. This is known as the Darlington effect. The two transistors of the 2N3806 array are connected in common emitter configuration, with a resistor placed in the collector circuit of the second transistor which acts as a bias voltage.

Conclusion

The 2N3806 is a versatile component which can be used in various circuit designs. It is a reliable and efficient device which can be used as an amplifier, frequency divider or logic circuit. Additionally, its high-frequency characteristics make it suitable for use in radio and television transmissions. Its wide range of applications make the 2N3806 a broadly used component.

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