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    • 81. 发明申请
    • POWER AMPLIFIER
    • 功率放大器
    • US20140049322A1
    • 2014-02-20
    • US13586218
    • 2012-08-15
    • Moon Suk JEONJung-Rin WOOSang Hwa JUNGJung Hyun KIMYoung KWON
    • Moon Suk JEONJung-Rin WOOSang Hwa JUNGJung Hyun KIMYoung KWON
    • H03G3/30H03F1/22
    • H03F1/223H03F1/0222H03F2200/102H03F2200/18
    • A power amplifier comprises a common source amplification stage and a first common gate amplification stage. The common source amplification stage includes a common source transistor for receiving a radio frequency (RF) input signal via a gate. The first common gate amplification stage is connected in cascode between a variable supply voltage source and the common source amplification stage, and amplifies an output of the common source amplification stage. The first common gate amplification stage includes a first common gate transistor, and a first gate bias controller configured to generate a first divided voltage based on a variable supply voltage of the variable supply voltage source, and to supply a first gate bias voltage generated by buffering the first divided voltage to a gate of the first common gate transistor.
    • 功率放大器包括公共源极放大级和第一公共栅极放大级。 公共源极放大级包括用于经由栅极接收射频(RF)输入信号的公共源极晶体管。 第一公共栅极放大级以可变电源电压源和公共源极放大级之间的级联连接,并放大公共源极放大级的输出。 第一公共栅极放大级包括第一公共栅极晶体管和第一栅极偏置控制器,其被配置为基于可变电源电压源的可变电源电压产生第一分压,并且提供由缓冲产生的第一栅极偏置电压 第一公共栅极晶体管的栅极的第一分压。
    • 84. 发明申请
    • POWER SUPPLY APPARATUS
    • 电源设备
    • US20130088803A1
    • 2013-04-11
    • US13372417
    • 2012-02-13
    • Jung Hyun KimJung Chul Gong
    • Jung Hyun KimJung Chul Gong
    • H02H9/02
    • H02H3/021H02H3/093H02H7/122
    • The present invention relates to a power supply apparatus including: a converting unit for converting an applied voltage into a predetermined level; a switching unit opened or closed to control current flowing in the converting unit; a detecting unit for detecting occurrence of overcurrent when a voltage applied to the switching unit is higher than a preset reference voltage; and a control unit for performing a protection operation when the overcurrent is detected more than a predetermined number of times within a predetermined time from when the overcurrent is detected and can prevent malfunction due to noises.
    • 本发明涉及一种电源装置,包括:转换单元,用于将施加的电压转换成预定电平; 开关单元打开或关闭以控制在转换单元中流动的电流; 检测单元,用于在施加到所述开关单元的电压高于预设参考电压时检测过电流的发生; 以及控制单元,用于当在检测到过电流之后的预定时间内检测到过电流超过预定次数时执行保护操作,并且可以防止由于噪声而导致的故障。
    • 86. 发明授权
    • Method and apparatus for providing impedance matching for high-frequency signal transmitter
    • 提供高频信号发射机阻抗匹配的方法和装置
    • US08233851B2
    • 2012-07-31
    • US12699112
    • 2010-02-03
    • Joo Young JeonSang Hwa JungJung Hyun KimYoung Kwon
    • Joo Young JeonSang Hwa JungJung Hyun KimYoung Kwon
    • H04B1/04H04B17/00
    • 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。
    • 90. 发明申请
    • DRIVER FOR LIGHT EMITTING DIODES
    • 用于发光二极管的驱动器
    • US20120074859A1
    • 2012-03-29
    • US13186110
    • 2011-07-19
    • Seung Kon KONGJae Shin LEEBo Hyun HWANGJung Hyun KIMJung Eui PARKJoon Youp SUNG
    • Seung Kon KONGJae Shin LEEBo Hyun HWANGJung Hyun KIMJung Eui PARKJoon Youp SUNG
    • H05B37/02
    • H05B33/0827H05B33/0848
    • There is provided a driver for light emitting diodes capable of differently setting duties in which driving current flows depending on respective light emitting diode (LED) channels according to a voltage deviation between the LED channels in order to reduce heat generated due to the voltage deviation between the LED channels. The driver for LEDs includes: a detecting unit detecting a voltage drop generated in each of a plurality of LED channels receiving driving power having a preset voltage level; a converting unit converting detected analog values from the detecting unit into digital values; and a driving unit differently setting switching duties in which driving current flows in each of the plurality of LED channels according to the digital values from the converting unit to drive the plurality of LED channels.
    • 提供了一种用于发光二极管的驱动器,其能够根据LED通道之间的电压偏差,根据各个发光二极管(LED)通道驱动电流而不同地设定工作,以便减少由于LED通道之间的电压偏差而产生的热量 LED通道。 用于LED的驱动器包括:检测单元,其检测在多个LED通道中的每一个中产生的电压降,其接收具有预设电压电平的驱动功率; 转换单元将来自检测单元的检测到的模拟值转换为数字值; 以及驱动单元,其根据来自转换单元的数字值,驱动电流在多个LED通道中的每一个流动,切换负荷不同,以驱动多个LED通道。