Receiver circuit
    4.
    发明申请
    Receiver circuit 失效
    接收电路

    公开(公告)号:US20050186932A1

    公开(公告)日:2005-08-25

    申请号:US11041868

    申请日:2005-01-25

    摘要: Interruption of a reception signal is achieved by placing a first low noise amplifier into the sleep state, and short-circuiting a shunt switch provided between differential input terminals of a second low noise amplifier during a DC offset canceling period. Further, an antenna switch is switched to a circuit system where DC offset canceling is not performed for preventing the input of the reception signal to a circuit system where DC offset canceling is performed.

    摘要翻译: 接收信号的中断通过将第一低噪声放大器置于睡眠状态,并且在DC偏移消除周期期间使设置在第二低噪声放大器的差分输入端之间的分流开关短路来实现。 此外,天线开关切换到电路系统,其中不执行DC偏移抵消以防止将接收信号输入到执行DC偏移消除的电路系统。

    Tuner module
    5.
    发明授权
    Tuner module 失效
    调谐器模块

    公开(公告)号:US08185071B2

    公开(公告)日:2012-05-22

    申请号:US12621883

    申请日:2009-11-19

    IPC分类号: H04B1/18

    CPC分类号: H04B1/30 H04B1/1036 H04B1/18

    摘要: A tuner module includes a filter that reduces the signal level outside the frequency band of a selected channel in an input RF signal of terrestrial television broadcasting, a local oscillation circuit that oscillates a local oscillation signal, a mixing circuit that mixes the RF signal in which the signal level outside the frequency band of the selected channel is reduced by the filter and the local oscillation signal oscillated by the local oscillation circuit to downconvert the RF signal to an intermediate frequency signal, and a control circuit that controls the local oscillation frequency of the local oscillation signal oscillated by the local oscillation circuit. The control circuit adjusts the local oscillation frequency to a value that suppresses an effect of a disturbance wave from other channels within a frequency band of the intermediate frequency signal of the selected channel.

    摘要翻译: 调谐器模块包括滤波器,其降低地面电视广播的输入RF信号中所选频道的频带之外的信号电平,振荡本地振荡信号的本地振荡电路,将RF信号混合的混合电路, 通过由本地振荡电路振荡的滤波器和本地振荡信号降低所选通道的频带外的信号电平,以将RF信号下变频为中频信号,以及控制电路,其控制本地振荡频率 本地振荡信号由本地振荡电路振荡。 控制电路将本地振荡频率调整为抑制来自所选频道的中频信号的频带内的其它信道的干扰波的影响的值。

    Receiver circuit
    6.
    发明授权
    Receiver circuit 失效
    接收电路

    公开(公告)号:US07376405B2

    公开(公告)日:2008-05-20

    申请号:US11041868

    申请日:2005-01-25

    IPC分类号: H04B1/00

    摘要: Interruption of a reception signal is achieved by placing a first low noise amplifier into the sleep state, and short-circuiting a shunt switch provided between differential input terminals of a second low noise amplifier during a DC offset canceling period. Further, an antenna switch is switched to a circuit system where DC offset canceling is not performed for preventing the input of the reception signal to a circuit system where DC offset canceling is performed.

    摘要翻译: 接收信号的中断通过将第一低噪声放大器置于睡眠状态,并且在DC偏移消除周期期间使设置在第二低噪声放大器的差分输入端之间的分流开关短路来实现。 此外,天线开关切换到电路系统,其中不执行DC偏移抵消以防止将接收信号输入到执行DC偏移消除的电路系统。

    TUNER MODULE
    7.
    发明申请
    TUNER MODULE 失效
    调谐器模块

    公开(公告)号:US20100130148A1

    公开(公告)日:2010-05-27

    申请号:US12621883

    申请日:2009-11-19

    IPC分类号: H04B1/18

    CPC分类号: H04B1/30 H04B1/1036 H04B1/18

    摘要: A tuner module includes a filter that reduces the signal level outside the frequency band of a selected channel in an input RF signal of terrestrial television broadcasting, a local oscillation circuit that oscillates a local oscillation signal, a mixing circuit that mixes the RF signal in which the signal level outside the frequency band of the selected channel is reduced by the filter and the local oscillation signal oscillated by the local oscillation circuit to downconvert the RF signal to an intermediate frequency signal, and a control circuit that controls the local oscillation frequency of the local oscillation signal oscillated by the local oscillation circuit. The control circuit adjusts the local oscillation frequency to a value that suppresses an effect of a disturbance wave from other channels within a frequency band of the intermediate frequency signal of the selected channel.

    摘要翻译: 调谐器模块包括滤波器,其降低地面电视广播的输入RF信号中所选频道的频带之外的信号电平,振荡本地振荡信号的本地振荡电路,将RF信号混合的混合电路, 通过由本地振荡电路振荡的滤波器和本地振荡信号降低所选通道的频带外的信号电平,以将RF信号下变频为中频信号,以及控制电路,其控制本地振荡频率 本地振荡信号由本地振荡电路振荡。 控制电路将本地振荡频率调整为抑制来自所选频道的中频信号的频带内的其它信道的干扰波的影响的值。