Patent ID: 8798199
Filing Date: 2014-08-05
Classification: H03F,H04L

Abstract:
1. A composite power amplifier that separates an input signal into separated signals, and amplifies and combines the separated signals, the composite power amplifier comprising: a plurality of signal splitters that split each of the separated signals into a signal in which a time component of the separated signal is put ahead a predetermined time and a signal in which the time component of the separated signal is delayed the predetermined time, and outputs split signals; an estimator that estimates delay discrepancy between the separated signals by using the input signal, the split signals output from each of the signal splitters, and a combined output signal; and an adjustor that adjusts the delay discrepancy between the separated signals by using the estimated delay discrepancy without information regarding an amplitude delay and a phase error, wherein the estimator includes: in the composite power amplifier, a linear amplification with nonlinear components (LINC) amplifier feedback signal is not used directly in early-late system and is used only for phase rotation control.