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    Heterodyne receiver for low noise and image frequency repression
    2.
    发明授权
    Heterodyne receiver for low noise and image frequency repression 失效
    外差接收机用于低噪声和图像频率抑制

    公开(公告)号：US07389098B2

    公开(公告)日：2008-06-17

    申请号：US10947863

    申请日：2004-09-23

    申请人： Nam Jin Oh ,  Moon Su Yang ,  Sang Gug Lee

    发明人： Nam Jin Oh ,  Moon Su Yang ,  Sang Gug Lee

    IPC分类号： H04B1/10

    CPC分类号： H04B1/30

    摘要： Disclosed is a heterodyne receiver for low noise and image frequency repression, comprising: a low noise amplifier for receiving an input signal from an antenna and amplifying the signal while reducing a noise figure of the input signal; and a frequency converter for receiving both the input signal outputted from the low noise amplifier and a local oscillation signal, filtering the signals to repress gain of the input signal at an image frequency band and increase gain of the input signal at a signal frequency band, and converting the frequency of the signals to the intermediate frequency band.

    摘要翻译： 公开了一种用于低噪声和图像频率抑制的外差接收机，包括：低噪声放大器，用于从天线接收输入信号并放大信号同时降低输入信号的噪声系数; 以及频率转换器，用于接收从低噪声放大器输出的输入信号和本地振荡信号，对信号进行滤波以抑制图像频带处的输入信号的增益，并增加信号频带处的输入信号的增益， 并将信号的频率转换成中频带。

    QUADRATURE VOLTAGE-CONTROLLED OSCILLATOR
    3.
    发明申请
    QUADRATURE VOLTAGE-CONTROLLED OSCILLATOR 审中-公开
    正弦电压控制振荡器

    公开(公告)号：US20070247242A1

    公开(公告)日：2007-10-25

    申请号：US11733042

    申请日：2007-04-09

    申请人： Jeong Hoon KIM ,  Sang-Gug LEE ,  Nam-Jin OH ,  Seok-Ju YUN ,  Eung Ju KIM ,  Tah Joon PARK

    发明人： Jeong Hoon KIM ,  Sang-Gug LEE ,  Nam-Jin OH ,  Seok-Ju YUN ,  Eung Ju KIM ,  Tah Joon PARK

    IPC分类号： H03L7/085

    CPC分类号： H03B27/00 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2200/0078

    摘要： A quadrature voltage-controlled oscillator comprises a first delay cell outputting first and second phase signals having a different phase; and a second delay cell outputting third and fourth phase signals having a different phase, the third and fourth phase signals crossing the first and second phase signals, respectively. The first delay cell includes a first differential voltage-controlled oscillator connected to a power supply and outputting the first and second phase signals; and a first coupling section including first and second coupling transistors connected to the first differential voltage-controlled oscillator and first and second coupling capacitors connected in parallel to the first and second coupling transistors, respectively, so as to be grounded, the first coupling section coupling the output phase signals. The second delay cell includes a second differential voltage-controlled oscillator connected to the power supply and outputting the third and fourth phase signals; and a second coupling section including third and fourth coupling transistors connected to the second differential voltage-controlled oscillator and third and fourth coupling capacitors connected in parallel to the third and fourth coupling transistors, respectively, so as to be grounded, the second coupling section coupling the output phase signals.

    摘要翻译： 正交压控振荡器包括：输出具有不同相位的第一和第二相位信号的第一延迟单元; 以及输出具有不同相位的第三和第四相位信号的第二延迟单元，所述第三和第四相位信号分别与所述第一和第二相位信号交叉。 第一延迟单元包括连接到电源并输出第一和第二相位信号的第一差分压控振荡器; 以及第一耦合部分，分别包括连接到第一差分压控振荡器的第一和第二耦合晶体管以及分别与第一和第二耦合晶体管并联连接以便接地的第一和第二耦合电容器，第一耦合部分耦合 输出相位信号。 第二延迟单元包括连接到电源并输出第三和第四相位信号的第二差分压控振荡器; 以及第二耦合部分，包括连接到第二差分压控振荡器的第三和第四耦合晶体管，以及分别与第三和第四耦合晶体管并联连接以便接地的第三和第四耦合电容器，第二耦合部分耦合 输出相位信号。

    Offset local oscillator without using frequency divider
    4.
    发明授权
    Offset local oscillator without using frequency divider 有权
    偏移本地振荡器而不使用分频器

    公开(公告)号：US07319366B2

    公开(公告)日：2008-01-15

    申请号：US11409886

    申请日：2006-04-24

    申请人： Nam-Jin Oh ,  Sang-Gug Lee

    发明人： Nam-Jin Oh ,  Sang-Gug Lee

    IPC分类号： H03B5/12 ,  H03B21/01

    CPC分类号： H03B27/00 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243

    摘要： A local oscillator without a frequency divider is provided. The local oscillator includes a quadrature voltage controlled oscillator generating I and Q signals having a frequency which is one-third of a local oscillation frequency, and a differential second-harmonic signal having a frequency which is two-thirds of the local oscillation frequency, a poly-phase filter converting the differential second-harmonic signal input from the quadrature voltage controlled oscillator into I and Q signals, and a single side band (SSB) mixer receiving the I and Q signals having the frequency which is one-third of the local oscillation frequency from the quadrature voltage controlled oscillator as an input and receiving the I and Q signals having the frequency which is two-thirds of the local oscillation frequency from the poly-phase filter as an input, and outputting the I and Q signals having the local oscillation frequency.

    摘要翻译： 提供了没有分频器的本地振荡器。 本地振荡器包括正交压控振荡器，其生成具有本地振荡频率的三分之一的频率的I和Q信号，以及具有作为本地振荡频率的三分之二的频率的差分二次谐波信号， 将从正交压控振荡器输入的差分二次谐波信号转换为I和Q信号的多相滤波器以及接收具有本地的三分之一频率的I和Q信号的单边带（SSB）混频器 振荡频率作为输入，从作为输入的多相滤波器接收具有作为本地振荡频率的三分之二的频率的I和Q信号，并输出具有 本地振荡频率。

    Offset local oscillator without using frequency divider
    6.
    发明申请
    Offset local oscillator without using frequency divider 有权
    偏移本地振荡器而不使用分频器

    公开(公告)号：US20070173218A1

    公开(公告)日：2007-07-26

    申请号：US11409886

    申请日：2006-04-24

    申请人： Nam-Jin Oh ,  Sang-Gug Lee

    发明人： Nam-Jin Oh ,  Sang-Gug Lee

    IPC分类号： H04B7/00

    CPC分类号： H03B27/00 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243

    摘要： A local oscillator without a frequency divider is provided. The local oscillator includes a quadrature voltage controlled oscillator generating I and Q signals having a frequency which is one-third of a local oscillation frequency, and a differential second-harmonic signal having a frequency which is two-thirds of the local oscillation frequency, a poly-phase filter converting the differential second-harmonic signal input from the quadrature voltage controlled oscillator into I and Q signals, and a single side band (SSB) mixer receiving the I and Q signals having the frequency which is one-third of the local oscillation frequency from the quadrature voltage controlled oscillator as an input and receiving the I and Q signals having the frequency which is two-thirds of the local oscillation frequency from the poly-phase filter as an input, and outputting the I and Q signals having the local oscillation frequency.

    摘要翻译： 提供了没有分频器的本地振荡器。 本地振荡器包括正交压控振荡器，其生成具有本地振荡频率的三分之一的频率的I和Q信号，以及具有作为本地振荡频率的三分之二的频率的差分二次谐波信号， 将从正交压控振荡器输入的差分二次谐波信号转换为I和Q信号的多相滤波器以及接收具有本地的三分之一频率的I和Q信号的单边带（SSB）混频器 振荡频率作为输入，从作为输入的多相滤波器接收具有作为本地振荡频率的三分之二的频率的I和Q信号，并输出具有 本地振荡频率。