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    Low noise mixer
    2.
    发明公开
    Low noise mixer 有权
    Rauscharmer米歇尔

    公开(公告)号：EP2544410A1

    公开(公告)日：2013-01-09

    申请号：EP12186890.5

    申请日：2006-08-31

    申请人： MediaTek Inc.

    发明人： Pullela, Rajasekhar ,  Sowlati, Tirdad ,  Rozenblit, Dmitriy

    IPC分类号： H04L12/26 ,  H03D7/16 ,  H03D7/14 ,  H04B1/28

    CPC分类号： H04B1/28 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0019 ,  H03D2200/0084

    摘要： A low noise mixer comprises a first mixer core configured to receive an input signal, and a first local oscillator signal, wherein the first local oscillator signal is at a frequency that is equal to the frequency of the RF output signal, the first mixer core configured to switch the input signal to at least one secondary mixer core at a frequency that coincides with the frequency of the first local oscillator signal, the at least one secondary mixer core configured to receive the switched input signal and a second local oscillator signal, where the second local oscillator signal is at a frequency that is normally twice the frequency of the RF output signal, and wherein switching the input signal at the frequency of the first local oscillator signal substantially eliminates flicker noise associated with the up-conversion process.

    摘要翻译： 低噪声混频器包括被配置为接收输入信号的第一混频器核心和第一本地振荡器信号，其中第一本地振荡器信号的频率等于RF输出信号的频率，第一混频器核心配置 以与第一本地振荡器信号的频率一致的频率将输入信号切换到至少一个辅助混频器核心，所述至少一个辅助混合器核心被配置为接收切换的输入信号和第二本地振荡器信号，其中 第二本地振荡器信号的频率通常是RF输出信号频率的两倍，并且其中以第一本地振荡器信号的频率切换输入信号基本上消除了与上转换过程相关联的闪烁噪声。