发明名称 |
Negative feedback amplifier for transmitter, transmitter, and method of correcting error in the negative feedback amplifier |
摘要 |
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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申请公布号 |
US7133649(B2) |
申请公布日期 |
2006.11.07 |
申请号 |
US20030743708 |
申请日期 |
2003.12.24 |
申请人 |
HITACHI KOKUSAI ELECTRIC, INC. |
发明人 |
KANAZAWA MASAYUKI;KUDO MASANORI |
分类号 |
H04B1/02;H03F1/32;H03F3/38;H04B1/04 |
主分类号 |
H04B1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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