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    Current-reuse bleeding mixer
    31.
    发明授权
    Current-reuse bleeding mixer 有权
    电流再利用出血混合器

    公开(公告)号：US06892062B2

    公开(公告)日：2005-05-10

    申请号：US09828182

    申请日：2001-04-09

    Applicant: Sang Gug Lee ,  Jung-Ki Choi ,  Nam-Soo Kim

    Inventor： Sang Gug Lee ,  Jung-Ki Choi ,  Nam-Soo Kim

    IPC: H03D1/00 ,  H03D7/14 ,  H04B1/26

    CPC classification number: H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0043

    Abstract: A current-reusing bleeding mixer capable of providing a higher conversion gain, linearity and lower noise figure employing a field-effect transistor includes a first to a fourth transistor and a first and a second load element. The first transistor amplifies a radio frequency (RF) signal. The second and the third transistor, each connected to the first transistor, receive a balanced local oscillator (LO) signal to mix it with the RF signal. The first and the second load element are connected between a supply voltage source and the second transistor and between the supply voltage source and the third transistor, respectively. The fourth transistor, connected between the supply voltage source and the first transistor, amplifies the RF signal and bleeds a current from the supply voltage source.

    Abstract translation: 能够使用场效应晶体管提供更高转换增益，线性度和较低噪声系数的电流再利用排出混合器包括第一至第四晶体管和第一和第二负载元件。 第一晶体管放大射频（RF）信号。 每个连接到第一晶体管的第二和第三晶体管接收平衡本地振荡器（LO）信号以将其与RF信号混合。 第一和第二负载元件分别连接在电源电压源和第二晶体管之间，以及电源电压源和第三晶体管之间。 连接在电源电压源和第一晶体管之间的第四晶体管放大RF信号并从电源电压源中流出电流。

    Frequency synthesizer, method of generating output frequency thereof and method of correcting conversion gain thereof
    33.
    发明授权
    Frequency synthesizer, method of generating output frequency thereof and method of correcting conversion gain thereof 失效
    频率合成器，其输出频率的产生方法和校正其变换增益的方法

    公开(公告)号：US08659323B2

    公开(公告)日：2014-02-25

    申请号：US13250037

    申请日：2011-09-30

    Applicant: Sang-Gug Lee ,  Seungjin Kim

    Inventor： Sang-Gug Lee ,  Seungjin Kim

    IPC: H03B21/00

    CPC classification number: H03L7/1976

    Abstract: A frequency synthesizer includes: a delta sigma modulator that outputs an input value to a sequentially changing digital value; an analog path unit that converts the digital value to an analog value according to a first conversion gain; an accumulator that accumulates a difference between the input and digital values; a digital to analog converter (DAC) that compensates an output value of the accumulator according to a second conversion gain; a correction loop that extracts analog tendency by adding an output of the analog path unit and an output of the DAC and that extracts digital tendency from an output of the accumulator and adjusts the second conversion gain by comparing the analog and digital tendency; and a voltage control oscillator that generates an output frequency by adding an output of the analog path unit and an output according to an adjusted second conversion gain of the DAC.

    Abstract translation: 频率合成器包括：ΔΣ调制器，其将输入值输出到顺序变化的数字值; 模拟路径单元，其根据第一转换增益将数字值转换为模拟值; 累加器，其累积输入和数字值之间的差; 数模转换器（DAC），其根据第二转换增益来补偿所述累加器的输出值; 校正循环，通过添加模拟路径单元的输出和DAC的输出来提取模拟趋势，并且从累加器的输出提取数字趋势，并通过比较模拟和数字趋势来调整第二转换增益; 以及电压控制振荡器，其通过将所述模拟路径单元的输出和根据所述DAC的经调整的第二转换增益的输出相加来产生输出频率。

    Variable gain amplifier with wide gain variation and wide bandwidth
    35.
    发明授权
    Variable gain amplifier with wide gain variation and wide bandwidth 有权
    具有宽增益变化和宽带宽的可变增益放大器

    公开(公告)号：US07557657B2

    公开(公告)日：2009-07-07

    申请号：US11775105

    申请日：2007-07-09

    Applicant: Hoang Duong Quoc ,  Sang Gug Lee ,  Jeong Hoon Kim ,  Tah Joon Park ,  Eung Ju Kim

    Inventor： Hoang Duong Quoc ,  Sang Gug Lee ,  Jeong Hoon Kim ,  Tah Joon Park ,  Eung Ju Kim

    IPC: H03F3/45

    CPC classification number: H03F3/45188 ,  H03F3/45632 ,  H03F2200/447 ,  H03F2200/456 ,  H03F2203/45466 ,  H03F2203/45482 ,  H03F2203/45641 ,  H03F2203/45654 ,  H03F2203/45681 ,  H03G1/0023

    Abstract: A variable gain amplifier including: a differential amplification unit amplifying and outputting a difference between a first input signal and a second input signal inputted via a first input terminal and a second input terminal, respectively, according to a first bias current of the first input terminal and second input terminal, to a first output terminal and a second output terminal; a diode-connected load unit comprising loads diode-connected to the first output terminal and second output terminal, respectively, the load receiving a second bias current; and a gain control unit controlling a gain between the input terminals and the output terminals of the differential amplification unit by controlling the size of the first bias current and second bias current.

    Abstract translation: 一种可变增益放大器，包括：差分放大单元，根据第一输入端子的第一偏置电流，分别放大并输出经由第一输入端子和第二输入端子输入的第一输入信号和第二输入信号之间的差值 和第二输入端，连接到第一输出端和第二输出端; 二极管连接的负载单元，分别包括负载二极管连接到第一输出端子和第二输出端子，负载接收第二偏置电流; 以及增益控制单元，通过控制第一偏置电流和第二偏置电流的大小来控制差分放大单元的输入端子和输出端子之间的增益。

    Differential voltage controlled oscillator using complementary transistors cross-coupled in series, and transceiver using the same
    38.
    发明授权
    Differential voltage controlled oscillator using complementary transistors cross-coupled in series, and transceiver using the same 有权
    差分压控振荡器使用互补晶体管串联耦合，收发器使用相同

    公开(公告)号：US07304548B2

    公开(公告)日：2007-12-04

    申请号：US11142434

    申请日：2005-06-01

    Applicant: Sang Gug Lee ,  So Bong Shin ,  Seok Ju Yun

    Inventor： Sang Gug Lee ,  So Bong Shin ,  Seok Ju Yun

    IPC: H03B5/12

    CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1243 ,  H03D7/165

    Abstract: A differential voltage controlled oscillator comprises first and second transistors having opposite magnitudes and directions of currents flowing to a third electrode from a second electrode corresponding to a voltage between first and second electrodes; and a resonance circuit coupled to the second electrodes of the first and second transistors and controlling a frequency of an oscillation signal corresponding to a control voltage. The second electrode of the first transistor is coupled to the first electrode of the second transistor to form a first output terminal, the first electrode of the first transistor is coupled to the second electrode of the second transistor to form a second output terminal, and the third electrodes of the first and second transistors are coupled to first and second powers.

    Abstract translation: 差分压控振荡器包括第一和第二晶体管，其具有与第一和第二电极之间的电压相对应的从第二电极流向第三电极的电流的相反大小和方向; 以及耦合到第一和第二晶体管的第二电极的谐振电路，并且控制与控制电压对应的振荡信号的频率。 第一晶体管的第二电极耦合到第二晶体管的第一电极以形成第一输出端，​​第一晶体管的第一电极耦合到第二晶体管的第二电极，以形成第二输出端，并且 第一和第二晶体管的第三电极耦合到第一和第二功率。

    Offset local oscillator without using frequency divider
    39.
    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

    Applicant: Nam-Jin Oh ,  Sang-Gug Lee

    Inventor： Nam-Jin Oh ,  Sang-Gug Lee

    IPC: H04B7/00

    CPC classification number: H03B27/00 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243

    Abstract: 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.

    Abstract translation: 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。

    Low power quadrature voltage controlled oscillator using back gate
    40.
    发明授权
    Low power quadrature voltage controlled oscillator using back gate 失效
    低功率正交压控振荡器采用后门

    公开(公告)号：US07145409B2

    公开(公告)日：2006-12-05

    申请号：US10925669

    申请日：2004-08-25

    Applicant: Sang Gug Lee ,  Hye Ryoung Kim

    Inventor： Sang Gug Lee ,  Hye Ryoung Kim

    IPC: H03H5/12

    CPC classification number: H03K3/354 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2201/0208

    Abstract: Disclosed is a quadrature VCO (voltage controlled oscillator) which comprises a first delay cell including a first switching transistor and a second switching transistor, the first delay cell outputting first and second in-phase signals with different phases; and a second delay cell including a third switching transistor and a fourth switching transistor, the second delay cell outputting first and second quadrature-phase signals with different phases. The first and second quadrature-phase signals are applied to back gates of the first and second switching transistors, and the first and second in-phase signals are applied to back gates of the fourth and third switching transistors.

    Abstract translation: 公开了一种正交VCO（压控振荡器），其包括具有第一开关晶体管和第二开关晶体管的第一延迟单元，所述第一延迟单元以不同相位输出第一和第二同相信号; 以及包括第三开关晶体管和第四开关晶体管的第二延迟单元，所述第二延迟单元输出具有不同相位的第一和第二正交相位信号。 第一和第二正交相位信号被施加到第一和第二开关晶体管的后栅极，并且第一和第二同相信号被施加到第四和第三开关晶体管的后栅极。

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