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19 条记录 (耗时 0.056 秒)

    Burst mode optical receiver for maintaining constant signal amplitude
    1.
    发明授权
    Burst mode optical receiver for maintaining constant signal amplitude 有权
    突发模式光接收机用于保持恒定的信号幅度

    公开(公告)号：US07539424B2

    公开(公告)日：2009-05-26

    申请号：US10696142

    申请日：2003-10-28

    申请人： Ho Yong Kang ,  Hyun Kyun Choi ,  Tae Whan Yoo ,  Hyeong Ho Lee ,  Sang Gug Lee ,  Man Seop Lee ,  Ja Won Seo

    发明人： Ho Yong Kang ,  Hyun Kyun Choi ,  Tae Whan Yoo ,  Hyeong Ho Lee ,  Sang Gug Lee ,  Man Seop Lee ,  Ja Won Seo

    IPC分类号： H04B10/06

    CPC分类号： H04B10/6931

    摘要： Provided is a burst mode optical receiver capable of accurately detecting an optical signal of minimum amplitude, by automatically controlling a gain of a pre-amplifier according to an amplitude of an input optical signal. The burst mode optical receiver can automatically control a gain of a pre-amplifier according to the amplitude of an input optical signal using an output signal of a first peak detector. In other words, when the input optical signal has a small amplitude that meets the receiving sensitivity of the burst mode optical receiver, the gain of the pre-amplifier automatically increases, thereby improving the receiving sensitivity of the burst mode optical receiver.

    摘要翻译： 提供了能够通过根据输入光信号的幅度自动控制前置放大器的增益来精确地检测最小幅度的光信号的突发模式光接收机。 突发模式光接收机可以使用第一峰值检测器的输出信号根据输入光信号的幅度自动控制前置放大器的增益。 换句话说，当输入光信号具有满足突发模式光接收机的接收灵敏度的小幅度时，前置放大器的增益自动增加，从而提高突发模式光接收机的接收灵敏度。

    METHOD OF GENERATING MULTI-CHANNEL LOCAL OSCILLATION FREQUENCIES
    3.
    发明申请
    METHOD OF GENERATING MULTI-CHANNEL LOCAL OSCILLATION FREQUENCIES 有权
    产生多通道局部振荡频率的方法

    公开(公告)号：US20080130713A1

    公开(公告)日：2008-06-05

    申请号：US11773261

    申请日：2007-07-03

    申请人： Yuna SHIM ,  Dae Young Yoon ,  Sang Gug Lee ,  Jeong Hoon Kim ,  Eung Ju Kim ,  Tah Joon Park

    发明人： Yuna SHIM ,  Dae Young Yoon ,  Sang Gug Lee ,  Jeong Hoon Kim ,  Eung Ju Kim ,  Tah Joon Park

    IPC分类号： H04B1/69

    CPC分类号： H04L27/2626 ,  H03L7/18 ,  H04B1/71635 ,  H04B1/719

    摘要： A method of generating multi-channel local oscillation frequencies in an ultra wide band communication system having multiple channels of identical bandwidth, the method including: generating at least one reference frequency; generating a plurality of auxiliary frequencies by dividing and multiplying the at least one reference frequency; and generating a plurality of first local oscillation frequencies by mixing the reference frequency and at least some of the plurality of auxiliary frequencies with other auxiliary frequencies, respectively, wherein each of the auxiliary frequencies used in the mixing is greater than an interval between the frequency being mixed and an outermost frequency in the ultra wide band.

    摘要翻译： 一种在具有相同带宽的多个信道的超宽带通信系统中产生多信道本地振荡频率的方法，所述方法包括：生成至少一个参考频率; 通过划分和乘以所述至少一个参考频率来产生多个辅助频率; 以及通过将所述参考频率和所述多个辅助频率中的至少一些分别与其他辅助频率混合来产生多个第一本地振荡频率，其中在所述混频中使用的每个辅助频率大于所述频率为 混合和超宽带中的最外频率。

    Source-injection parallel coupled LC-quadrature voltage controlled oscillator
    4.
    发明授权
    Source-injection parallel coupled LC-quadrature voltage controlled oscillator 失效
    源极 - 并联耦合LC正交压控振荡器

    公开(公告)号：US07199675B2

    公开(公告)日：2007-04-03

    申请号：US10915850

    申请日：2004-08-11

    申请人： Sang Gug Lee ,  So Bong Shin ,  Hyoung Chul Choi

    发明人： Sang Gug Lee ,  So Bong Shin ,  Hyoung Chul Choi

    IPC分类号： H03B5/12

    CPC分类号： H03K3/354 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B27/00 ,  H03K3/0322

    摘要： A quadrature VCO comprises: a first delay cell including a first differential VCO coupled between a power supply and a first current source; and first and second coupling transistors that each include a first terminal, a second terminal coupled to the power supply, and a third terminal, and that vary a current flowing from the second terminal to the third terminal according to quadrature-phase signals applied to the first terminal; and a second delay cell including a second differential VCO coupled between a power supply and a second current source; and third and fourth coupling transistors that each include a first terminal, a second terminal coupled to the power, and a third terminal, and that vary a current flowing from the second terminal to the third terminal according to in-phase signals applied to the first terminal.

    摘要翻译： 正交VCO包括：第一延迟单元，包括耦合在电源和第一电流源之间的第一差分VCO; 以及第一和第二耦合晶体管，其每个包括第一端子，耦合到电源的第二端子和第三端子，并且根据施加到第一端子的正交相位信号改变从第二端子流向第三端子的电流 第一码头 以及第二延迟单元，包括耦合在电源和第二电流源之间的第二差分VCO; 以及第三和第四耦合晶体管，其每个包括第一端子，耦合到电力的第二端子和第三端子，并且根据施加到第一端子的同相信号改变从第二端子流向第三端子的电流 终奌站。

    Current-reuse bleeding mixer
    5.
    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

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

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

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

    CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0043

    摘要： 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.

    摘要翻译： 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。

    Circuit and method for measuring capacitance value of touch screen
    6.
    发明授权
    Circuit and method for measuring capacitance value of touch screen 有权
    用于测量触摸屏电容值的电路和方法

    公开(公告)号：US08674709B2

    公开(公告)日：2014-03-18

    申请号：US13106411

    申请日：2011-05-12

    申请人： Ji Hun Kim ,  Hyun Min Song ,  Joon Ho Na ,  Ki Uk Gwak ,  Sang Gug Lee

    发明人： Ji Hun Kim ,  Hyun Min Song ,  Joon Ho Na ,  Ki Uk Gwak ,  Sang Gug Lee

    IPC分类号： G01R27/26

    CPC分类号： G06F3/044

    摘要： A circuit for measuring a capacitance value of a touch screen includes: a target capacitor unit having a target capacitor charged with a target charging voltage; a target voltage control unit to charge the target capacitor; a reference capacitor unit having a reference capacitor charged with a charging reference voltage; a reference voltage control unit to charge the reference capacitor; a comparator to compare the target charging voltage and the charging reference voltage and output a transition signal at a moment when the target charging voltage becomes higher than the charging reference voltage; and a controller to receive an output signal of the comparator and a clock signal and generate a digital output signal and a control signal, wherein a capacitance value of the target capacitor is measured using a time elapsed from a time when the target capacitor is initialized to a time when the transition signal is outputted.

    摘要翻译： 用于测量触摸屏的电容值的电路包括：目标电容器单元，其具有充电目标充电电压的目标电容; 目标电压控制单元，用于对目标电容器充电; 具有充电了充电参考电压的参考电容器的参考电容器单元; 参考电压控制单元，用于对参考电容器充电; 比较器，用于比较目标充电电压和充电参考电压，并在目标充电电压变得高于充电参考电压的时刻输出转换信号; 以及控制器，用于接收比较器的输出信号和时钟信号，并产生数字输出信号和控制信号，其中使用从目标电容器初始化的时间起经过的时间来测量目标电容器的电容值 输出转换信号的时间。

    Low voltage frequency synthesizer using boosting method for power supply voltage of charge pump
    8.
    发明授权
    Low voltage frequency synthesizer using boosting method for power supply voltage of charge pump 失效
    低压频率合成器采用电荷泵电源电压升压方式

    公开(公告)号：US07928806B2

    公开(公告)日：2011-04-19

    申请号：US12561910

    申请日：2009-09-17

    申请人： Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon ,  Jong Pil Hong ,  Sang Gug Lee

    发明人： Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon ,  Jong Pil Hong ,  Sang Gug Lee

    IPC分类号： H03B5/12 ,  H03L5/00 ,  H03L7/06 ,  H03L7/08 ,  H03L7/085 ,  H03L7/089 ,  H03L7/099 ,  H03L7/18

    CPC分类号： H03L7/0891 ,  H03L5/00 ,  H03L7/099

    摘要： Provided is a low voltage frequency synthesizer using a boosting method for a power supply voltage of a charge pump. The low voltage frequency synthesizer includes a phase/frequency detector (PFD) that receives and compares a reference frequency and a feedback frequency to output a comparison signal, a charge pump that receives the comparison signal to output a current corresponding to the comparison signal, a low-pass filter (LPF) that generates a voltage corresponding to the output current of the charge pump, a voltage controlled oscillator (VCO) that receives the voltage of the LPF, amplifies the voltage to generate a boosting voltage, and outputs a frequency corresponding to the received voltage, and a DC converter that receives the boosting voltage of the VCO, converts the boosting voltage into a DC voltage, and applies the DC voltage as a power supply voltage of the charge pump. Since the supply voltage of the charge pump is provided from the LC-circuit-based VCO, the frequency synthesizer has superior characteristics such as a wide locking range, low phase noise, and the prevention of performance degradation caused by an external environment or process variations.

    摘要翻译： 提供了使用电荷泵的电源电压的升压方法的低压频率合成器。 所述低电压频率合成器包括接收比较参考频率和反馈频率以输出比较信号的相位/频率检测器（PFD），接收比较信号以输出与比较信号相对应的电流的电荷泵， 产生与电荷泵的输出电流相对应的电压的低通滤波器（LPF），接收LPF电压的压控振荡器（VCO），放大电压以产生升压电压，并输出对应的频率 以及接收VCO的升压电压的DC转换器，将升压电压转换成直流电压，并施加直流电压作为电荷泵的电源电压。 由于电荷泵的电源电压是从基于LC电路的VCO提供的，因此频率合成器具有优异的特性，例如宽锁定范围，低相位噪声，以及防止由外部环境或工艺变化引起的性能下降 。

    Symmetric multi-layer spiral inductor for use in RF integrated circuits
    9.
    发明授权
    Symmetric multi-layer spiral inductor for use in RF integrated circuits 失效
    用于射频集成电路的对称多层螺旋电感

    公开(公告)号：US06380835B1

    公开(公告)日：2002-04-30

    申请号：US09558394

    申请日：2000-04-25

    申请人： Sang Gug Lee

    发明人： Sang Gug Lee

    IPC分类号： H01F500

    CPC分类号： H01F17/0013

    摘要： A symmetric multi-layer inductor, providing an increased inductance of a conventional dual-layer inductor, exhibits a quality factor comparable to or better than that of a conventional single-layer inductor. The inductor includes a top metal patterned layer provided with a pair of groups of N number of metal lines, a bottom metal patterned layer, disposed between the substrate and the top metal patterned layer, provided with a pair of groups of N number of metal lines and an insulating material surrounding each of the metal patterned layers. In the inductor, the group of N number of metal lines on the each metal patterned layer and the other group of N number of metal lines on the same metal patterned layer are symmetric to each other with respect to an imaginary central line. Each of the metal lines has at least one via hole at one end thereof.

    摘要翻译： 提供常规双层电感器的增加的电感的对称多层电感器表现出与常规单层电感器相当或更好的品质因数。 电感器包括设置有一对N组金属线的顶部金属图案化层，底层金属图案化层，设置在基板和顶部金属图案化层之间，设置有一对N组金属线 以及围绕每个金属图案化层的绝缘材料。 在电感器中，每个金属图案层上的N个金属线组和相同金属图案化层上的N个金属线的另一组组相对于虚拟中心线彼此对称。 每个金属线在其一端具有至少一个通孔。