发明名称 |
AMPLIFIER CTB REDUCTION BY PHASE FILTERING |
摘要 |
A broadband communication system includes multi-stage power amplifier systems for amplifying the power of radio-frequency (RF) communication signals. Each stage of the amplifier system results in composite triple beat (CTB) distortion and if the phase of the CTB distortions are approximately the same (i.e. are in-phase), then the amplitudes of the distortions are added (i.e. "20 dB" rule). The amplifier system of the invention includes one or more phase filters positioned in series between the power amplifier stages. The phase filters are adapted to shift the phase of the communication signals, so that, the phase of CTB distortions, resulting from the amplification of the communication signals in the amplifier stages between the phase filters, are substantially different (i.e. out-of-phase). Thus, only the power of the CTB distortions are added (i.e. "10 dB" rule). |
申请公布号 |
WO0150600(A1) |
申请公布日期 |
2001.07.12 |
申请号 |
WO2000EP12720 |
申请日期 |
2000.12.14 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
SCHEMMANN, MARCEL, F.;MARECEVIC, ZORAN |
分类号 |
H03F1/32;H03F3/60;H03F3/68;H03H7/09;H03H7/19;H04B3/14;H04B10/00;H04H20/78;H04N7/10;H04N7/173;H04N7/22 |
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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