发明公开
- 专利标题： Feedforward amplifier
- 专利标题（中）： Vorwärtskopplungsverstärker
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申请号： EP06017861.3申请日： 2000-03-30
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公开(公告)号： EP1724917A1公开(公告)日： 2006-11-22
- 发明人: Suzuki, Yasunori , Nojima, Toshio
- 申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.
- 申请人地址： 11-1, Nagatacho 2-chome, Chiyoda-ku Tokyo 100-6150 JP
- 专利权人： NTT MOBILE COMMUNICATIONS NETWORK INC.
- 当前专利权人： NTT MOBILE COMMUNICATIONS NETWORK INC.
- 当前专利权人地址： 11-1, Nagatacho 2-chome, Chiyoda-ku Tokyo 100-6150 JP
- 代理机构： Hoffmann, Eckart
- 优先权： JP9235599 19990331; JP16331499 19990610
- 主分类号： H03F1/32
- IPC分类号： H03F1/32 ; H03F1/02
摘要：
A feedforward amplifier comprises a main-amplifier distortion detector (13) made up of: a main-amplifier path (11) containing a main amplifier (23), a first linear path (12); a main-amplifier power divider (31) for branching an input signal to said main-amplifier path (11) and said first linear path (12), and a power combiner/divider (32) for combining the outputs from said main-amplifier path and said first linear path (12) and for outputting the sum component and the difference component of said combined outputs as a main-amplifier main signal component and a main-amplifier distortion component, respectively; and a main-amplifier distortion canceller (16) made up of: a second linear path (14) supplied with said main signal component, a main-amplifier distortion injection path (15) containing auxiliary amplifying means (27, 28, 29), and a main-amplifier power combiner (33) for combining the output of said second linear path (14) with the output of said main-amplifier distortion injection path (15). The main amplifier (23) has a plurality of amplification characteristics.
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