发明名称 |
Distortion-compensated amplifying circuit |
摘要 |
Provided is a distortion-compensated amplifying circuit capable of suppressing distortion without attenuating a level of carrier components, and further obtaining a larger amount of suppression of distortion, which has not been achievable by conventional distortion-compensated amplifying circuit using a pre-distortion technique. A balanced type amplifying circuit is structured such that amplifiers 115 and 116 placed in parallel are sandwiched by 90-degree hybrid circuits 114 and 117. The 90-degree hybrid circuit 114 is supplied with an original signal including carrier components and a distortion signal including distortion equal in amplitude and opposite in phase (having a phase difference of 180 degrees) to distortion that occurs when the original signal is amplified by the amplifiers 115 and 116. The 90-degree hybrid circuit 114 performs a process of differential amplification with a phase difference of 180 degrees between the original signal and the distortion signal. Then, the amplified original signal and distortion signal outputted from the 90-degree hybrid circuit 117 are combined by a directional coupler 118, thereby canceling distortion components included in both signals with each other.
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申请公布号 |
US2003117217(A1) |
申请公布日期 |
2003.06.26 |
申请号 |
US20020323836 |
申请日期 |
2002.12.20 |
申请人 |
MATSUYOSHI TOSHIMITSU;ISHIDA KAORU;FUJIWARA SEIJI |
发明人 |
MATSUYOSHI TOSHIMITSU;ISHIDA KAORU;FUJIWARA SEIJI |
分类号 |
H03F1/32;(IPC1-7):H03F1/26 |
主分类号 |
H03F1/32 |
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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