2SC4226-A

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2SC4226-A Application Field and Working Principle

2SC4226-A is a type of NPN transistor and belongs to the category of bipolar transistors. It is specially designed for use in RF applications, such as in mobile phones, cellular base station, RF amplifiers, FM receivers and mobile radio. This transistor features high gain, low noise figure and high output power, making it an ideal choice for many types of RF applications.

2SC4226-A is a NPN transistor with an active region in between the collector and the base, separated by the emitter. It is a versatile device, capable of operating in either common emitter or common base configurations. The NPN transistors are biased in two ways:

• In common base configuration, the base is connected to a negative voltage and the collector is connected to a positive voltage.
• In common emitter configuration, the emitter is connected to a negative voltage and the collector is connected to a positive voltage.

The current flow through the transistor is determined by the magnitude of the current of electrons entering the base region, relative to those leaving the emitter. The ratio between the two currents is called the "current gain" and is denoted by the parameter hFE. The higher the hFE, the higher the gain of the transistor.The maximum power (dissipated) by 2SC4226-A transistor is 2 watts. This power rating is quite important to consider, as it will help to design RF power amplifiers that can handle the required power without causing the transistor to fail due to overheating.

The 2SC4226-A transistor is also known for its low noise figure. The noise figure of the transistor describes the amount of random noise generated by the device. In general, the lower the noise figure, the better the performance of the device. High-frequency transistors are usually characterized by a lower noise figure than low-frequency transistors.

The 2SC4226-A has a wide range of uses in RF applications, such as mobile phone base stations, mobile radio, and FM receivers. In these applications, the transistor provides high gain, low noise figure and high output power, making it suitable for many RF systems where these parameters are key performance drivers. The 2SC4226-A comes in a TO92 package and is available in large quantities from semiconductor vendors.

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