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    • 1. 发明申请
    • 復調器およびそれを用いた受信機
    • 使用它的调理器和接收器
    • WO2003049276A1
    • 2003-06-12
    • PCT/JP2001/010471
    • 2001-11-30
    • ソニー株式会社ソニーインターナショナル阿部雅美佐生 登クルペゼビッチ ドラガンブランコビッチ ヴェセリンラトニ モハメド
    • 阿部雅美佐生 登クルペゼビッチ ドラガンブランコビッチ ヴェセリンラトニ モハメド
    • H03D9/00
    • H03D3/007H04B1/30
    • A demodulator which has broad band characteristics, is low in distortion and power consumption and small in characteristic variations with respect to variations in temperature and changes with time, and can be improved in demodulating performance; and which comprises a 5−port junction circuit that receives a reception signal and a local signal to generate three signals having phase difference, and detects respective signal levels (amplification components) of these signals to obtain three power detection signals (base band signals) (P1, P2, P3), a first multiplier for multiplying a detection signal (P1) by a factor (A1) for offsetting the square components of a interference signal and a local signal, a second multiplier for multiplying a detection signal (P2) by a factor (A2) for offsetting the square components of a interference signal and a local signal, a first subtractor for subtracting the first multiplication result from the the detection signal (P2), a second subtractor for subtracting the second multiplication result from the detection signal (P3), and a multi−port signal/IQ signal conversion circuit for converting output signals from the first and second subtractors into an in−phase signal (I) and an orthogonal signal (Q) that are demodulation signals.
    • 具有宽带特性的解调器的失真和功耗低,相对于温度变化和时间变化的特性变化小,并且可以提高解调性能; 并且其包括接收接收信号的5端口结电路和产生具有相位差的三个信号的本地信号,并且检测这些信号的各个信号电平(放大分量)以获得三个功率检测信号(基带信号)( P1,P2,P3),用于将检测信号(P1)乘以因子(A1)以抵消干扰信号和本地信号的平方分量的第一乘法器,用于将检测信号(P2)乘以 用于抵消干扰信号和本地信号的平方分量的因子(A2),用于从检测信号(P2)中减去第一相乘结果的第一减法器,用于从检测信号中减去第二相乘结果的第二减法器 (P3)和多端口信号/ IQ信号转换电路,用于将来自第一和第二减法器的输出信号转换为同相信号(I)和正交信号 gnal(Q)是解调信号。