1.5G 100W Power Amplifier introduction

A power amplifier is an electronic device used to amplify an input low-power signal into an output high-power signal. Specifically, the main performance indicators of power amplifiers include gain, bandwidth, linearity, efficiency, and distortion.

Gain: Gain is a measure of how many times a power amplifier amplifies an input signal. Usually expressed in decibels (dB). The higher the gain, the greater the power output of the amplifier. In many application scenarios, it is necessary to enhance the input signal to an appropriate level through an amplifier to meet specific requirements.

Bandwidth: Bandwidth is an indicator of the frequency range that a power amplifier can amplify. It defines the highest and lowest frequencies that a power amplifier can transmit, beyond which signals cannot be effectively amplified. For many applications, a wider bandwidth is crucial as it allows the amplifier to process signals over a wider frequency range.

Linearity: Linearity is an indicator that describes whether a power amplifier can accurately amplify an input signal. When there is a proportional relationship between the input signal and the output signal, the power amplifier is considered linear. The linearity determines the accuracy of the amplified signal and the degree of signal distortion of the power amplifier. In some application scenarios, such as audio amplifiers and wireless communication systems, it is required that the amplifier has excellent linearity.

Efficiency: Efficiency measures the percentage of input power that a power amplifier converts into output power. High efficiency power amplifiers can convert more input power into output power, thereby reducing energy waste and heat generation. Low energy efficiency power amplifiers can result in power loss and additional heat dissipation requirements, affecting the stability and lifespan of the system.

Distortion: Distortion is an indicator of the error between the output signal and the input signal of a power amplifier. Common distortions include harmonic distortion, cross distortion, and phase distortion. Distortion can cause nonlinear distortion in the amplified signal, seriously affecting the quality and accuracy of the signal. Therefore, it is required that power amplifiers have low distortion characteristics.

In addition to the main performance indicators mentioned above, factors such as voltage resistance, stability, and noise of power amplifiers also need to be considered. The withstand voltage index represents the maximum voltage that a power amplifier can withstand. The stability index indicates whether the power amplifier can maintain stable characteristics over a long period of time. The noise index represents the additional noise introduced by the amplifier during the amplification of the signal. These indicators are of great significance for different applications.

The main performance indicators of power amplifiers include gain, bandwidth, linearity, efficiency, and distortion. Choosing the appropriate power amplifier requires balancing these indicators based on application requirements to achieve the best amplification effect. It should be noted that different application scenarios have different requirements for power amplifiers, so it is necessary to comprehensively consider the above indicators and specific needs to choose the appropriate power amplifier.