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371 条记录 (耗时 0.018 秒)

    A MIXER CIRCUIT
    2.
    发明公开
    A MIXER CIRCUIT 审中-公开
    混频器电路

    公开(公告)号：EP2695293A1

    公开(公告)日：2014-02-12

    申请号：EP11713244.9

    申请日：2011-04-04

    申请人： Telefonaktiebolaget LM Ericsson (PUBL)

    发明人： BAO, Mingquan

    IPC分类号： H03D7/14 ,  H03D7/18

    CPC分类号： H03D7/1425 ,  H03C2200/0083 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D7/18 ,  H03D2200/0033 ,  H03D2200/0043 ,  H03D2200/009 ,  H04B1/04

    摘要： A mixer circuit (200, 300, 800, 900) for mixing a first input signal at a first frequency with a second input signal at a second frequency to an output signal at a third frequency. The mixer circuit (200, 300, 800, 900) comprises a mixing stage (205, 805) with differential input ports (206, 207; 820, 821) for the first input signal and an input port (211, 911) for the second input signal and differential output ports for the output signal, which also serve as output ports for the mixer circuit. The mixer circuit (200, 300, 800, 900) comprises a nonlinear digital to analogue converter (210, 810) which has an input port (211) which is the input port for the second input signal and an output port (212) which is connected to the input port of the mixing stage, and the digital to analogue converter has a nonlinear transfer function.

    Low noise mixer
    6.
    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。

    A Gilbert mixer including decoupling means
    8.
    发明公开
    A Gilbert mixer including decoupling means 审中-公开
    Gilbert-Mischer mit Entkopplung

    公开(公告)号：EP2458729A1

    公开(公告)日：2012-05-30

    申请号：EP10252023.6

    申请日：2010-11-30

    申请人： NXP B.V.

    发明人： Chen, Ying ,  Geurts, Marcel

    IPC分类号： H03D7/14

    CPC分类号： H03D7/1425 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1483 ,  H03D2200/0084

    摘要： A Gilbert mixer (200) comprising four switching transistors (Q3, Q4, Q5, Q6), two intermediate frequency transistors (Q1, Q2), and one or more DC decoupling components (202). The one or more DC decoupling components (202) are coupled between the switching transistors (Q3, Q4, Q5, Q6) and the intermediate frequency transistors (Q1, Q2) in order to DC decouple the switching transistors (Q3, Q4, Q5, Q6) from the intermediate frequency transistors (Q1, Q2).

    摘要翻译： 吉尔伯特混合器（200）包括四个开关晶体管（Q3，Q4，Q5，Q6），两个中频晶体管（Q1，Q2）和一个或多个DC去耦组件（202）。 一个或多个DC去耦组件（202）耦合在开关晶体管（Q3，Q4，Q5，Q6）和中频晶体管（Q1，Q2）之间，以便使开关晶体管（Q3，Q4，Q5， Q6）从中频晶体管（Q1，Q2）。

    SINGLE ENDED MULTIBAND FEEDBACK LINEARIZED RF AMPLIFIER AND MIXER WITH DC-OFFSET AND IM2 SUPPRESSION FEEDBACK LOOP
    10.
    发明授权
    SINGLE ENDED MULTIBAND FEEDBACK LINEARIZED RF AMPLIFIER AND MIXER WITH DC-OFFSET AND IM2 SUPPRESSION FEEDBACK LOOP 有权
    非对称线性频段RF反馈放大器和混频器与DC失调和IM2抑制的反馈回路

    公开(公告)号：EP2294700B1

    公开(公告)日：2012-03-07

    申请号：EP09772343.1

    申请日：2009-06-23

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： TIRED, Tobias

    IPC分类号： H04B1/30 ,  H03D3/00

    CPC分类号： H04B1/30 ,  H03D3/008 ,  H03D7/1433 ,  H03D7/145 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043 ,  H03D2200/0088 ,  H03D2200/009

    摘要： A receiver arrangement includes a single ended multiband feedback amplifier, at least one single ended input, differential output mixer arrangement including a main mixer and a trim mixer, and a mixer feedback loop circuit configured to receive differential output signals generated by the mixer arrangement. The mixer feedback loop circuit generates a feedback signal based on the received differential output signals and provides the feedback signal to the mixer arrangement to minimize DC-offset and second order intermodulation products. The single ended multiband feedback amplifier may include an input stage and a programmable resonance tank circuit connected to the input stage for suppressing downconverted noise from harmonics of the LO-frequency, and a configurable feedback net that shapes the frequency response of a feedback loop including the feedback net based on a band operation of the single ended multiband feedback amplifier.