ACA0862DRS7P2

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RF amplifiers are types of amplifiers used to amplify radio frequency (RF) signals. The ACA0862DRS7P2 is a radio frequency amplifier designed specifically for use where voltage supply, frequency response, performance and manufacture costs are of the utmost importance.

Application Field

The ACA0862DRS7P2 is designed to operate within the frequency band from 900 MHz to 1099 MHz, with a wide range of applications such as communications systems, direction finding systems, and signal transmission systems. It is able to deliver one watt of power with 10dB of gain, while providing good linearity and high efficiency. It is used in environments lined up with some of the most demanding applications where reliable and robust reception of signals is essential.

It is especially suitable for a wide range of applications including, but not limited to, wireless local area networks (WLANs), cellular base stations, satellite communications systems, radio amateur transmitter and satellite-navigation systems. It can be utilized by the professional RF engineer, the hobbyist, and the laboratory technician.

Working Principle

The ACA0862DRS7P2 operates as class A, bipolar type power amplifier. It utilizes the RF field for rectification of signal noise and distortion. It also employs one or more stage of power amplifier which is then used to increase the power of the signal and reduce feed-back. Then an automatic gain control loop is put in place to allow for precise control of the power amplifier\'s output power.

The RF signal is also amplified by a low noise amplifier and a frequency selective amplifier. The amplifier\'s wide gain bandwidth ensures suppressing of harmonics while avoiding gain compression. It also allows for a wide range of output power levels corresponding to different RF input levels.

The working current is supplied through a bias system which can be adjusted according to the particular application. The bias ensures that the amplifier is operated correctly, by keeping the circuit away from the saturation and cut-off points of the device. It also prevents overdriving and underutilizing most of the available power.

The output power of the amplifier is controlled by a pulse-width-modulated (PWM) unit. The PWM unit triggers a buck-regulator that adjusts the bias for the output stage accordingly. The output of the amplifier is then connected to an impedance bridge, consisting of a network of resistors spanning the output impedance from the amplifier.

The ACA0862DRS7P2 is a robust and reliable high power amplifier with excellent linearity, high efficiency, and fast transient response. It is capable of delivering one watt of output power with 10dB of gain with a very low noise figure while providing high stability over temperature and voltage supply range.

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