NEGATIVE FEEDBACK AMPLIFIER FOR TRANSMITTER, TRANSMITTER, AND ERROR CORRECTION METHOD FOR NEGATIVE FEEDBACK AMPLIFIER

摘要

PROBLEM TO BE SOLVED: To provide a method for correcting a phase error and an amplitude error that occur in a negative feedback amplifier.;SOLUTION: The negative feedback amplifier for the transmitter includes a vector corrector for correcting and outputting at least one of phases and amplitudes of an in-phase component and a quadrature component of an input baseband signal including data to be transmitted, an adder for adding feedback signals of the in-phase component and the quadrature component to the in-phase component and the quadrature component of the output of the vector corrector, a modulator for applying quadrature modulation to the in-phase component and the quadrature component of the output of the adder, a power amplifier for amplifying the output of the modulator, and a demodulator for applying quadrature demodulation to a portion of the output of the power amplifier and outputting the feedback signals of the in-phase component and the quadrature component, and the vector corrector performs correction operation for canceling the error of any one of the phases and the amplitudes of the in-phase component and the quadrature component in the demodulator.;COPYRIGHT: (C)2004,JPO&NCIPI