HMC8120-SX

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RF Amplifiers

The HMC8120-SX is a broad-band, high-power RF amplifier designed for applications requiring high power with extremely linear performance. This amplifier can handle power levels of over 10 watts and frequencies from 35 MHz to 2 GHz. The design incorporates advanced power supply control and protection circuitry ensuring optimum performance, reliability and ease of operation for the user.

The HMC8120-SX is designed with an internal RF protection switch which prevents excess RF power from damaging components. The protection switch also enables the amplifier to increase output power without distortion when needed. The amplifier\'s input impedance presents an impedance match within a range from 50 to 75 ohms, providing a wide range for system applications.

Application Field

The HMC8120-SX is typically used in systems requiring high power with very linear performance. These include base station, broadcast, and satellite applications. It is well-suited for transcievers and linear amplifiers, as well as supervisory and control systems such as antenna systems used for cellular and wireless data applications.

Working Principle

The HMC8120-SX RF amplifier is designed using a class A/B linear amplifier configuration, capable of providing high power and linear performance over a wide frequency range. The factors that contribute to the amplifier’s linear performance include the use of high quality, low noise components, along with a low input impedance and precise output power regulation.

The amplifier is designed to minimize the degradation of the linearity as the power level increases. The output power is adjusted by controlling the supply voltage of the amplifier’s power stage. Adjustment of the supply voltage is accomplished by using a built-in power supply control circuit that monitors the output power and adjusts the voltage accordingly.

The amplifier also features an internal RF protection switch which prevents excess RF power from damaging components. The protection switch also enables the amplifier to increase output power without distortion when needed.

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