Telecommunications – Transmitter
Reexamination Certificate
2006-11-07
2006-11-07
Moe, Aung (Department: 2618)
Telecommunications
Transmitter
C455S115100
Reexamination Certificate
active
07133649
ABSTRACT:
A negative feedback amplifier for a transmitter, in which a vector corrector outputs the corrected signals, an adder adds the 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, respectively, a modulator performs a quadrature modulation with respect to the in-phase component and the quadrature component of the outputs from the adder, a power amplifier amplifies the output of the modulator, a demodulator performs a quadrature demodulation to a part of the output of the power amplifier and outputs the feedback signals of the in-phase component and the quadrature component, and the vector corrector performs a correcting operation of canceling an error of at least one of the phases and the amplitudes of the in-phase component and the quadrature component occurring in the demodulator.
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Kanazawa Masayuki
Kudo Masanori
Hitachi Kokusai Electric Inc.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Moe Aung
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