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    • 12. 发明申请
    • METHOD AND APPARATUS FOR PROVIDING IMPEDANCE MATCHING FOR HIGH-FREQUENCY SIGNAL TRANSMITTER
    • 用于提供高频信号发射机的阻抗匹配的方法和装置
    • US20110189964A1
    • 2011-08-04
    • US12699112
    • 2010-02-03
    • Joo Young JeonSang Hwa JungJung Hyun KimYoung Kwon
    • Joo Young JeonSang Hwa JungJung Hyun KimYoung Kwon
    • H04B1/04
    • H04B1/04
    • In accordance with another representative embodiment, a high-frequency signal transmitter a power amplifier configured to supply a high-frequency signal; an antenna configured to transmit the high-frequency signal; a transmission line configured to transfer the high-frequency signal from the power amplifier to the antenna; and an impedance matching circuit connected to the transmission line. The high-frequency signal transmitter also comprises a mismatch detector. The mismatch detector is configured to designate a comparatively poor linearity region and a comparatively good linearity region by dividing a Smith chart into the two regions based on Adjacent Channel Power Ratio (ACPR) contours drawn on the Smith chart at a point on the transmission line where the impedance matching circuit is connected, to measure a time-dependent reflection coefficient of the high-frequency signal transmitter in terms of a phase and a magnitude, to determine whether the reflection coefficient is located in the comparatively poor linearity region or the comparatively good linearity region, and based on a result of the determination, to improve the linearity of the high-frequency signal transmitter.
    • 根据另一个代表性实施例,一种高频信号发射机,被配置为提供高频信号的功率放大器; 配置为发送高频信号的天线; 传输线,被配置为将高频信号从功率放大器传送到天线; 以及与传输线连接的阻抗匹配电路。 高频信号发射机还包括不匹配检测器。 不匹配检测器被配置为通过基于在传输线上的一点上在史密斯圆图上绘制的相邻信道功率比(ACPR)轮廓将史密斯圆图划分成两个区域来指定相对较差的线性区域和相对良好的线性度区域,其中 连接阻抗匹配电路,根据相位和幅度测量高频信号发射器的时间相关反射系数,以确定反射系数是否位于相对较差的线性区域或较好的线性度 区域,并且基于确定的结果,提高高频信号发射机的线性度。
    • 14. 发明授权
    • Radar detector having function of hands-free device
    • 雷达探测器具有免提装置功能
    • US07440779B2
    • 2008-10-21
    • US11299770
    • 2005-12-13
    • Dong Chul KimJeong Hun KimYoung Jip KimJong Yeon KimJung Hyun Kim
    • Dong Chul KimJeong Hun KimYoung Jip KimJong Yeon KimJung Hyun Kim
    • H04M1/00
    • H04M1/6075G01S7/021H04B1/3877
    • A radar detector enabling hands-free communication over a mobile phone by connecting the mobile phone to the radar detector. The radar detector includes a horn antenna; a signal-processing unit (SPU) for detecting a signal received by the horn antenna; a laser module for receiving a laser signal; a central processing unit (CPU) for controlling the SPU; a pulse delay unit for delaying or sustaining a CPU pulse; a sweep voltage generator unit for driving the SPU; a warning unit for warning the detected signal; an audio amplifier controller connected to the CPU and the warning unit to amplify an audio signal; and a connecting unit installed to connect the audio amplifier controller with a mobile phone. The connecting unit includes a microphone, a switch for reception of a signal from the mobile phone, and a connection portion for connection to the mobile phone.
    • 一种雷达检测器,通过将移动电话连接到雷达探测器,实现手机上的免提通信。 雷达检测器包括喇叭天线; 用于检测由喇叭天线接收的信号的信号处理单元(SPU); 用于接收激光信号的激光模块; 用于控制SPU的中央处理单元(CPU); 用于延迟或维持CPU脉冲的脉冲延迟单元; 用于驱动SPU的扫描电压发生器单元; 用于警告所检测到的信号的警告单元; 音频放大器控制器,连接到CPU和警告单元以放大音频信号; 以及安装用于将音频放大器控制器与移动电话连接的连接单元。 连接单元包括麦克风,用于接收来自移动电话的信号的开关,以及用于连接到移动电话的连接部分。
    • 17. 发明授权
    • Digital PWM generator and apparatus for driving light emitting device
    • 用于驱动发光器件的数字PWM发生器和装置
    • US08519637B2
    • 2013-08-27
    • US13069558
    • 2011-03-23
    • Jung Hyun KimBo Hyun HwangJung Sun KwonSeung Kon KongJae Shin LeeJoon Youp Sung
    • Jung Hyun KimBo Hyun HwangJung Sun KwonSeung Kon KongJae Shin LeeJoon Youp Sung
    • H05B37/02
    • H05B33/0842H05B33/0818H05B33/0824Y02B20/346
    • There is provided a digital PWM generator according to a first exemplary embodiment of the present invention including: an A/D converter dividing a predetermined reference voltage into a plurality of sections corresponding to a predetermined first set value, searching a section to which the magnitude of an input voltage Vin corresponds, among the plurality of sections, and converting a value corresponding to the searched section into a digital signal; a frequency selector providing a counting number by counting a predetermined high-speed counting clock during a one-cycle section of a predetermined reference clock; and a PWM signal generator converting the digital signal from the A/D converter into a ratio value corresponding to a ratio for the reference voltage and generating a PWM signal having a controlled duty ratio of the reference clock by using the ratio value and the counting number from the frequency selector.
    • 提供了根据本发明的第一示例性实施例的数字PWM发生器,包括:A / D转换器,将预定的参考电压分成对应于预定的第一设定值的多个部分, 在多个部分中,输入电压Vin对应于将与搜索到的部分相对应的值转换为数字信号; 频率选择器,通过在预定参考时钟的一个周期段内对预定的高速计数时钟进行计数来提供计数数; 以及PWM信号发生器,其将来自A / D转换器的数字信号转换成与参考电压的比率相对应的比值,并通过使用比值和计数数来产生具有参考时钟的受控占空比的PWM信号 从频率选择器。
    • 20. 发明申请
    • LED DRIVING DEVICE
    • LED驱动装置
    • US20120212146A1
    • 2012-08-23
    • US13109535
    • 2011-05-17
    • Bo Hyun HWANGJung Sung KwonJung Hyun KimSeung Kon KongJae Shin LeeJoon Youp Sung
    • Bo Hyun HWANGJung Sung KwonJung Hyun KimSeung Kon KongJae Shin LeeJoon Youp Sung
    • H05B37/02
    • H05B33/0827H05B33/0842
    • Disclosed herein is a light emitting diode (LED) driving device for driving a multi-channel LED element or an LED array for each channel, the LED driving device including: a constant current driver driving currents flowing in each channel; a first switching unit selectively feeding-back voltage levels of each channel; and a switching controller controlling the turn on/off of the first switching unit, wherein matching characteristics of currents flowing in each channel is improved and a size of an integrated circuit (IC) chip is also reduced as compared to a case according to the related art, thereby making it possible to reduce a production cost and satisfy the trend of miniaturization of the chip, while solving a performance deterioration problem due to degradation of the matching of the currents between the channels.
    • 本发明公开了一种用于驱动每个通道的多通道LED元件或LED阵列的发光二极管(LED)驱动装置,该LED驱动装置包括:驱动在每个通道中流动的电流的恒流驱动器; 第一开关单元选择性地反馈每个通道的电压电平; 以及控制第一开关单元的接通/断开的开关控制器,其中改善了在每个通道中流动的电流的匹配特性,并且与根据相关的情况相比,集成电路(IC)芯片的尺寸也降低 从而可以降低生产成本并满足芯片小型化的趋势,同时解决由于通道之间的电流匹配劣化引起的性能劣化问题。