NT25L59-PR

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NT25L59-PR Application Field and Working Principle

The NT25L59-PR RF Low Noise Preamplifier is a type of linear amplifier highly specialized to serve a range of purposes. It is part of the family of linear amplifiers also known as special purpose amplifiers due to the wide array of applications and uses they cover.

The operating frequency range of NT25L59-PR spans from 0.01MHz to 1.0GHz, which makes it the perfect fit for a wide array of applications. These include communications, instrumentation, broadcast, navigation, and surveillance systems in which signal amplification and signal conditioning are required.

Design

The NT25L59-PR design is based on RF Coupled active FET Stages. The excellent gain flatness of the package, accompanied by the ability to respond to very large input signal levels, makes the NT25L59-PR a perfect match for broadband applications requiring a choice of many preamplifier configurations.

Furthermore, the high linearity and low noise figure of the NT25L59-PR makes it a prime choice for applications involving high signal-to-noise ratios that require very low distortion and very low noise levels.

Application Field

The NT25L59-PR can be used for the efficient amplification of the signals of the following communication systems: terrestrial wireless, wireless base-stations, mobile satellite systems, digital TV, and VSAT.

It is also widely used in popular navigation and surveillance systems like GPS, GALILEO, DGPS and AIS. Moreover, it is also used in helicopter radio and avionics.

In addition to its use in communication systems, the NT25L59-PR is also known to be used in instrumentation systems, such as spectrum analyzers, digital oscilloscopes and other electronic test instruments. It is also used in medical equipment, radio astronomical instrumentation, infrared and wireless sensing systems.

Working Principle

The working principle of the NT25L59-PR can be explained as follows:

• It uses a pair of active FET stages to achieve excellent gain flatness. This means that the gain does not vary significantly with frequency.
• The FET stages are coupled using an RF transformer that reduces the output level of the first stage, while maintaining its linearity. This transformer enables the linearity of the amplifier to be maintained with very large input levels.
• The amplifier maintains a low noise figure by efficiently optimizing the noise contribution of both the first stage FET and the RF transformer.
• By using a combination of narrowband and wideband feedback circuits, the overall gain flatness is improved further.
• The overall noise figure is kept low by careful selection of FETs and other components.

In summary, the NT25L59-PR excellent gain flatness, high linearity and low noise figure, makes it a favorite choice for a wide variety of applications. It is a reliable linear amplifier for a wide range of specialized applications.

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