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    • 7. 发明授权
    • Receiving circuit of mobile communication terminal having feed forward linearizer
    • 具有前馈线性化的移动通信终端的接收电路
    • US06393011B1
    • 2002-05-21
    • US09222462
    • 1998-12-29
    • Sung-Uk Kim
    • Sung-Uk Kim
    • H04B7216
    • H04B1/123
    • A receiving circuit of a mobile communication terminal which can prevent the deterioration of receiving sensitivity caused by an intermodulation product signal. The receiving circuit includes a front-end receiver, a controller, and a feed forward linearizer having an intermodulation product generator, a phase shifter and a variable attenuator. The feed forward linearizer generates an internodulation product signal in a feed forward path having the same magnitude as an intermodulation product signal in a main path, generated from the front-end receiver, but with a 180° phase difference. As a result, the intermodulation product signals are eliminated via vectorial addition of the signals in the main and feed forward paths.
    • 移动通信终端的接收电路,其可以防止由互调产物信号引起的接收灵敏度的劣化。 接收电路包括前端接收器,控制器和具有互调产物发生器,移相器和可变衰减器的前馈线性化器。 前馈线性化器在前馈路径中产生与前端接收器产生的主路径中的互调乘积信号相同幅度但具有180°相位差的前馈路径的调制乘积信号。 结果,通过在主和前馈路径中的信号的矢量相加来消除互调产物信号。