POWER AMPLIFIER AND METHOD FOR AMPLIFYING SIGNALS BASED ON THE SAME

摘要

A power amplifier and method for amplifying signals based on the power amplifier are provided. The power amplifier includes an operation amplifier stage, at least one buffer stage and an output stage which are consecutively connected with each other. A first feedback unit is connected between the output end of the output stage and the negative input end of the operation amplifier stage. A second feedback unit is connected between the input end of the output stage and the negative input end of the operation amplifier stage. A third feedback unit is connected between the input end of the at least one buffer stage and the negative input end of the operation amplifier stage. The feedback signals provided by the first, second and third feedback units are superposed at the negative input end of the operation amplifier stage. The power amplifier has a high band width and a stable gain.