BUL146G

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The BUL146G is a low saturation voltage NPN transistor for general purpose amplification. It is a commonly used and versatile type of transistor which is used in a wide range of electronic and electrical applications. This article will discuss the application fields and working principle of the BUL146G.

Application Fields

The BUL146G is used in power supplies and switch mode power supply circuits, as a driver and oscillator in switching relays and thyristors, and in control circuits. Additionally, the BUL146G can be used as a voltage and current regulator, as a relay driver, and as a high-frequency oscillator.

Working Principle

The BUL146G is a bipolar junction transistor (BJT). It is based on a three-layer, two-junction semiconductor structure. The base of the transistor is the middle layer, with the two outer layers comprising the collector and the emitter. The transistor works by a flow of current from the collector to the emitter when a certain voltage is applied to the base. When a small current flows through the base, a larger current can be made to flow through the collector and emitter, allowing the transistor to amplify a signal.

The gain of the BUL146G is determined by the current flowing through the base. When a large current flows through the base, the gain of the transistor is low, while when a small current flows, the gain is high. This can be adjusted by varying the voltage applied to the base.

The transistor also has a small saturation voltage when it is turned on, which is determined by the voltage on the base and the current flowing through the transistor. This ensures that the transistor only starts conducting electricity when the voltage across it is within a certain range.

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