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    • 1. 发明授权
    • Wake-up receiver and wake-up method using duty cycling and power off technique
    • 唤醒接收机和唤醒方式,使用负载循环和关机技术
    • US08285243B2
    • 2012-10-09
    • US12808766
    • 2008-12-03
    • Ho-Yong KangDae-Young YoonTrung-Kien NguyenJi-Eun KimXiaohua YuNae-Soo KimCheol-Sig PyoSeok-Kyun HanSang-Gug Lee
    • Ho-Yong KangDae-Young YoonTrung-Kien NguyenJi-Eun KimXiaohua YuNae-Soo KimCheol-Sig PyoSeok-Kyun HanSang-Gug Lee
    • H04B1/16
    • H04W52/0229Y02D70/122Y02D70/166
    • Provided is a low-power wake-up receiver that is sensitive to electric waves, by which power consumed by a radio frequency (RF) transceiver of a sensor node in a ubiquitous sensor network (USN) is minimized. A wake-up receiver waking up a main transceiver includes a duty cycle signal generation unit controlling a duty cycle of a duty cycle signal; a burst signal detection unit receiving an input signal including a burst signal and a data signal based on the duty cycle signal, amplifying the input signal, and, if the amplified input signal is the burst signal, outputting a control signal; and a data signal detection unit re-amplifying the amplified input signal based on the control signal, and, if the re-amplified input signal is the data signal, outputting a wake-up signal. Power supplied to the duty cycle signal generation unit is interrupted based on the control signal and power is re-supplied to the duty cycle signal generation unit based on the wake-up signal.
    • 提供了一种对电波敏感的低功率唤醒接收机,通过这种接收器可以最小化无处不在的传感器网络(USN)中的传感器节点的射频(RF)收发器所消耗的功率。 唤醒主收发器的唤醒接收机包括:占空比信号发生单元,控制占空比信号的占空比; 突发信号检测单元,基于占空比信号接收包括脉冲串信号和数据信号的输入信号,放大输入信号,如果放大的输入信号是脉冲串信号,则输出控制信号; 并且数据信号检测单元基于控制信号对放大的输入信号进行再放大,并且如果再放大的输入信号是数据信号,则输出唤醒信号。 基于该控制信号,中断向占空比信号生成部供给的电力,并根据该唤醒信号将功率重新提供给占空比信号生成部。
    • 3. 发明授权
    • Apparatus for rejecting image in receiver
    • 用于在接收机中拒绝图像的装置
    • US08300744B2
    • 2012-10-30
    • US12695860
    • 2010-01-28
    • Sun a KimDae-Young YoonSang-Gug LeeHyung-Chul ParkJeong-seon Lee
    • Sun a KimDae-Young YoonSang-Gug LeeHyung-Chul ParkJeong-seon Lee
    • H03D1/04
    • H04L27/3863H03D3/009H03D7/166H03D7/18H04B1/30
    • The present invention relates to an apparatus for rejecting images in a receiver.The apparatus of the present invention relates to an apparatus for rejecting image signals in a receiver of a direct conversion structure and comprises a signal mismatch compensation unit configured to detect gain error and phase error between an In-phase (I) signal and a Quadrature (Q) signal received through the receiver, to reject image signals existing in the I and Q signals, and to output a result. The signal mismatch compensation unit detects the gain error and the phase error using an adaptive step method of reducing the step size of the gain error and the phase error step by step whenever the gain error and the phase error are converged.According to the present invention, high image rejection ratio is achieved and the adaptation time taken to obtain a high image rejection ratio is reduced simultaneously. Further, a bad influence of the DC offset on the image rejection ratio can be prevented by removing DC offset signals in a digital structure, accordingly, error can be accurately estimated.
    • 本发明涉及一种用于拒绝接收机中的图像的装置。 本发明的装置涉及一种用于拒绝直接转换结构的接收机中的图像信号的装置,并且包括:信号失配补偿单元,被配置为检测同相(I)信号和正交(I)信号之间的增益误差和相位误差, Q)信号,以消除存在于I和Q信号中的图像信号,并输出结果。 信号失配补偿单元使用自适应步长法,在增益误差和相位误差收敛的情况下逐步减小增益误差的步长和相位误差来检测增益误差和相位误差。 根据本发明,实现了高的图像抑制比,同时降低了获得高的图像抑制比所需的适应时间。 此外,通过去除数字结构中的DC偏移信号,可以防止DC偏移对图像抑制比的不良影响,因此可以准确地估计误差。
    • 4. 发明申请
    • APPARATUS FOR REJECTING IMAGE IN RECEIVER
    • 用于拒绝接收器中的图像的装置
    • US20110182388A1
    • 2011-07-28
    • US12695860
    • 2010-01-28
    • Sun a. KimDae-Young YoonSang-Gug LeeHyung-Chul ParkJeongseon Lee
    • Sun a. KimDae-Young YoonSang-Gug LeeHyung-Chul ParkJeongseon Lee
    • H04L27/08
    • H04L27/3863H03D3/009H03D7/166H03D7/18H04B1/30
    • The present invention relates to an apparatus for rejecting images in a receiver.The apparatus of the present invention relates to an apparatus for rejecting image signals in a receiver of a direct conversion structure and comprises a signal mismatch compensation unit configured to detect gain error and phase error between an In-phase (I) signal and a Quadrature (Q) signal received through the receiver, to reject image signals existing in the I and Q signals, and to output a result. The signal mismatch compensation unit detects the gain error and the phase error using an adaptive step method of reducing the step size of the gain error and the phase error step by step whenever the gain error and the phase error are converged.According to the present invention, high image rejection ratio is achieved and the adaptation time taken to obtain a high image rejection ratio is reduced simultaneously. Further, a bad influence of the DC offset on the image rejection ratio can be prevented by removing DC offset signals in a digital structure, accordingly, error can be accurately estimated.
    • 本发明涉及一种用于拒绝接收机中的图像的装置。 本发明的装置涉及一种用于拒绝直接转换结构的接收机中的图像信号的装置,并且包括:信号失配补偿单元,被配置为检测同相(I)信号和正交(I)信号之间的增益误差和相位误差, Q)信号,以消除存在于I和Q信号中的图像信号,并输出结果。 信号失配补偿单元使用自适应步长法,在增益误差和相位误差收敛的情况下逐步减小增益误差的步长和相位误差来检测增益误差和相位误差。 根据本发明,实现了高的图像抑制比,同时降低了获得高的图像抑制比所需的适应时间。 此外,通过去除数字结构中的DC偏移信号,可以防止DC偏移对图像抑制比的不良影响,因此可以准确地估计误差。
    • 5. 发明授权
    • Digital automatic gain control apparatus and method in burst mode optical receiver
    • 数字自动增益控制装置和方法在突发模式光接收机
    • US08660439B2
    • 2014-02-25
    • US12086225
    • 2006-12-05
    • Ho-Yong KangHyun-Kyun ChoiQuan LeYool KwonBong-Tae KimSang-Gug Lee
    • Ho-Yong KangHyun-Kyun ChoiQuan LeYool KwonBong-Tae KimSang-Gug Lee
    • H04B10/69
    • H04B10/6931H03G3/3084H04B10/66
    • A transimpedance amplifier for a burst mode optical communication converts a burst current signal into differential output voltage signals. Using a multi-level digital AGC mechanism, the transimpedance amplifier is rapidly adapted to a burst signal whose amplitude varies in a wide range. By using an adaptive level detection method, a multi-level digital AGC can be implemented without using ADC. In addition, because the transimpedance amplifier uses a selective reset generation scheme that performs a reset operation for itself after a high power burst, a burst mode operation can be performed without external reset signals. Accordingly, the transimpedance amplifier can be integrated with an optical detector within a TO-can. Furthermore, the transimpedance amplifier can have the burst mode capability and the best sensitivity.
    • 用于突发模式光通信的跨阻放大器将突发电流信号转换成差分输出电压信号。 使用多电平数字AGC机制,跨阻放大器快速适应幅度在宽范围内变化的脉冲串信号。 通过使用自适应电平检测方法,可以在不使用ADC的情况下实现多电平数字AGC。 此外,由于跨阻抗放大器使用在高功率突发之后对其自身执行复位操作的选择性复位产生方案,所以可以在没有外部复位信号的情况下执行突发模式操作。 因此,跨阻放大器可以与TO-can内的光学检测器集成。 此外,跨阻放大器可以具有突发模式能力和最佳灵敏度。
    • 7. 发明授权
    • Frequency synthesizer, method of generating output frequency thereof and method of correcting conversion gain thereof
    • 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
    • US08659323B2
    • 2014-02-25
    • US13250037
    • 2011-09-30
    • Sang-Gug LeeSeungjin Kim
    • Sang-Gug LeeSeungjin Kim
    • H03B21/00
    • H03L7/1976
    • 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.
    • 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。
    • 8. 发明申请
    • Offset local oscillator without using frequency divider
    • 偏移本地振荡器而不使用分频器
    • US20070173218A1
    • 2007-07-26
    • US11409886
    • 2006-04-24
    • Nam-Jin OhSang-Gug Lee
    • Nam-Jin OhSang-Gug Lee
    • H04B7/00
    • H03B27/00H03B5/1215H03B5/1228H03B5/1243
    • 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.
    • 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。
    • 9. 发明授权
    • Method of making a reference current generator
    • 制作参考电流发生器的方法
    • US5686822A
    • 1997-11-11
    • US640108
    • 1996-04-30
    • Gregg Douglas CroftSang-Gug LeeSteven Robert Jost
    • Gregg Douglas CroftSang-Gug LeeSteven Robert Jost
    • G05F3/26G05F1/10
    • G05F3/265
    • A current generator and method of making a current generator in which two resistors are provided, each in series with one of two transistors in the generator, and in which one of the resistors is trimmed if the reference current is too large and the other is trimmed if the reference current is too small, thereby obviating the problems of the prior art in which one resistor must be trimmed by a potentially large and unacceptable amount. The two resistors are formed with a distribution of resistances which is centered on their corresponding target resistance values so that the number of resistors to be trimmed and the amount of trimming per resistor are reduced. The appropriate target resistances of the resistors can be determined if a maximum trim factor is set. The method is insensitive to variations in the process by which the resistances of the resistors are initially set and reduces the variability of the untrimmed reference current with respect to resistor critical dimensions.
    • 一种电流发生器和制造电流发生器的方法,其中设置有两个电阻器,每个电阻器与发生器中的两个晶体管中的一个串联,并且如果参考电流太大而另一个被修整,则电阻器中的一个被修整 如果参考电流太小,从而避免了现有技术的问题,其中一个电阻器必须用可能大的和不可接受的量来修整。 两个电阻器形成有以其对应的目标电阻值为中心的电阻分布,使得要修整的电阻器的数量和每个电阻器的修整量减少。 如果设置了最大微调因子,则可以确定电阻器的适当目标电阻。 该方法对于最初设置电阻器的电阻的过程中的变化不敏感,并且减小未匹配参考电流相对于电阻器关键尺寸的可变性。
    • 10. 发明申请
    • FREQUENCY SYNTHESIZER, METHOD OF GENERATING OUTPUT FREQUENCY THEREOF AND METHOD OF CORRECTING CONVERSION GAIN THEREOF
    • 频率合成器,其输出频率的产生方法及其变换增益的校正方法
    • US20120306542A1
    • 2012-12-06
    • US13250037
    • 2011-09-30
    • Sang-Gug LeeSeungjin Kim
    • Sang-Gug LeeSeungjin Kim
    • H03B21/00
    • H03L7/1976
    • 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.
    • 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。