PN4118

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The PN4118 is a small signal N-Channel Junction Field Effect Transistor (JFET) that is widely used in amplifying and switching applications. In general, JFETs are distinguished from other transistors because they require relatively low gate voltages to operate while allowing high current densities. This makes them popular in low voltage and low power applications. The PN4118 is specifically designed to perform with excellent reliability in a wide range of operating conditions.

The PN4118 is an audio amplifier, designed to have an optimal combination of low noise, high gain, and high frequency response. This makes the component well suited for low noise operation and low distortion in high frequency amplifiers. It is also used extensively in high gain RF amplifiers, and can operate from as low as 9V up to 25V at a maximum power of 300 milliwatts.

The main purpose of the PN4118 is to function as an input transistor. This component is configured with an integrated source resistor and operates with a high transconductance of over 500mS. Due to its optimal combination of features the PN4118 is suitable for use in a broad range of applications including RF amplitude modulation and demodulation, audio preamplifiers, wide bandwidth amplifiers, and even as a switching transistor.

In operation, the PN4118 works by controlling the level of current that is allowed to flow through the transistor body. This is achieved through an input voltage applied to the gate of the transistor, which is then connected to the drain and the source. When a suitable input voltage is applied to the gate, the current that is allowed to flow through the transistor body is controlled, and the output is determined by the amount of current that is allowed to flow through the body. As such, the PN4118 can be used to control either gain or attenuation in an amplifier.

The PN4118 also offers a wide range of operating temperatures, from -65°C to +125°C. This makes the component particularly well suited for operating in extreme environmental or operational conditions. It has a maximum operating temperature of up to +150°C and a storage temperature of up to +150°C.

In-circuit testing is possible using an RF probe and a simple test fixture. The PN4118 can also be tested using a JFET curve tracer, which is an invaluable tool for investigating transistor behavior. The PN4118 is suitable for use in both linear and switching applications, making it a valuable part of all sorts of different circuits and application areas.

In summary, the PN4118 is a small signal N-Channel Junction Field Effect Transistor (JFET) that is commonly used in amplifying and switching applications. It is designed to have an optimal combination of low noise, high gain, and high frequency response. It is capable of operating from as low as 9V up to 25V, making it well suited for low voltage, low power applications. The high transconductance of over 500mS also makes the PN4118 suitable for use in input stages in RF amplifiers, amplitude modulation and demodulation, and audio preamplifiers. In addition, the wide range of operating temperatures makes the PN4118 suitable for extreme environmental or operational conditions. Overall, the PN4118 is a valuable component for many applications and should be considered by engineers when selecting the right transistor for their circuit.

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