FEEDFORWARD LINEAR POWER AMPLIFIER WITH A NEGATIVE GROUP DELAY CIRCUIT CAPABLE OF SATISFYING A GROUP DELAY MATCHING CONDITION ACCORDING TO LINEARIZATION BY REDUCING THE USE OF A TIME DELAY DEVICE

摘要

PURPOSE: A feedforward linear power amplifier with a negative group delay circuit is provided to obtain a negative group delay time response in broadband by forming a negative group delay circuit using a transmission line resonator.;CONSTITUTION: A gain phase adjuster(100) adjusts the amplitude and phase of a signal flowing to a main power amplifier path. A main power amplifier(200) power-amplifies the signal adjusted through the gain phase adjuster. A negative group delay circuit(300) is placed on a common path for group delay matching between an output signal of the main power amplifier and a reference path signal. A combiner(400) outputs only an intermodulation distortion signal to the other gain phase adjuster(500) by eliminating a main signal. The gain phase adjuster adjusts the gain and phase of the intermodulation distortion signal outputted from the combiner. An error amplifier(600) amplifies the intermodulation distortion signal.;COPYRIGHT KIPO 2012