2N3690

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2N3690 Application Field and Working Principle

The 2N3690 is a silicon NPN transistor manufactured by Motorola Semelab. It has been used in various applications such as switching, amplifying, and in radio frequency (RF) circuits. The 2N3690 has a wide variety of applications in both low and high power applications, from low power AC/DC circuits to high power switching applications. In this article, the application field of the 2N3690 transistor and its principles of operation will be discussed.

Application Fields

The 2N3690 transistor is commonly used as a switching device in applications such as relays, solenoids, or automotive ignition systems. The transistor can also be used in amplifying applications, such as audio amplifiers, video amplifiers, and RF amplifiers. In particular, the 2N3690 transistor can be used in low frequency audio amplifiers or power amplifiers, as well as RF amplifiers up to UHF. The transistor can also be used in timer circuits, motor drivers, and variety of other circuits.

Working Principle

To understand how the 2N3690 transistor works, one must understand the basic principles of bipolar transistors. Bipolar transistors consist of three terminals, which are the base, the collector and the emitter. The base-collector junction is forward biased, allowing the current to flow from the base to the collector, and the base-emitter junction is reversed biased, preventing current from flowing from the base to the emitter. The current flow through the transistor is controlled by changing the voltage applied to the base, thus changing the resistance of the transistor and allowing more or less current to flow. In the 2N3690 transistor, the base is connected to the input signal and the collector is connected to the output. As such, the 2N3690 acts as an amplifier, taking in a small voltage signal (i.e. the base voltage) and amplifying it to produce a large voltage signal (i.e. the collector voltage). The 2N3690 can also be used as a switch, where the transistor’s base is connected to an external circuitry and the collector connected to an output device. When the base voltage is above a certain threshold, the transistor conduct and current flows from the base to the collector, thus turning on the device. When the base voltage drops below the threshold, the transistor does not conduct and current does not flow, thus turning off the device.

Conclusion

The 2N3690 is a versatile bipolar transistor that can be used in a variety of applications. The 2N3690 can be used in applications such as switching, amplifying and radio frequency circuits, as it can take in a small input signal and amplify it, or can be used as a switch to control a device. The transistor operates on the principle of controlling the current flow via a base voltage, as the base-collector junction is forward biased and the base-emitter junction is reversed biased.

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