Circulating current sensing device for amplifiers

摘要

A power amplifier system capable of operation with paralleled power amplifiers includes a circulating current sensing device. The circulating current sensing device decouples the outputs of the paralleled power amplifiers and passively minimizes unbalanced power output of the paralleled amplifiers. In addition, the circulating current sensing device provides the capability to measure circulating current. The measured circulating current may be used in a negative feedback circulating current control to actively minimize unbalanced power output of the paralleled power amplifiers.