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    • 181. 发明授权
    • Predistorter for power amplifier
    • 功率放大器预失真器
    • US07408408B2
    • 2008-08-05
    • US11185107
    • 2005-07-20
    • Hyun-Il KangYoung-Hwan KimJae-Sup LeeSang-Hyun Woo
    • Hyun-Il KangYoung-Hwan KimJae-Sup LeeSang-Hyun Woo
    • H03F1/26
    • H03F1/3276
    • A predistorter that linearizes the nonlinearity of a power amplifier in a system supporting a multimode and a multiband (frequency band). The predistorter includes a field-effect transistor, an impedance transform unit, a first inductor, a first capacitor, and a second capacitor. The field-effect transistor has a source connected to the ground and uses a variable gate bias voltage. The impedance transform unit is connected to a drain of the field-effect transistor to perform impedance transform. The first inductor is connected between the impedance transform unit and a voltage provided to the field-effect transistor. The first capacitor is connected between a power input terminal and the impedance transform unit. The second capacitor is connected between a power output terminal and the impedance transform unit.
    • 一种预失真器,其将支持多模和多频带(频带)的系统中的功率放大器的非线性线性化。 预失真器包括场效应晶体管,阻抗变换单元,第一电感器,第一电容器和第二电容器。 场效应晶体管具有连接到地并且使用可变栅极偏置电压的源极。 阻抗变换单元连接到场效应晶体管的漏极,以进行阻抗变换。 第一电感器连接在阻抗变换单元和提供给场效应晶体管的电压之间。 第一电容器连接在电源输入端子和阻抗变换单元之间。 第二电容器连接在电力输出端子和阻抗变换单元之间。
    • 187. 发明申请
    • Method of transmitting information with the help of chaotic signals
    • 借助混沌信号传输信息的方法
    • US20050129413A1
    • 2005-06-16
    • US10996048
    • 2004-11-24
    • Seong-soo LeeYoung-hwan KimAlexander Dmitriev
    • Seong-soo LeeYoung-hwan KimAlexander Dmitriev
    • H04B1/04H04B10/04H04B10/12H04K1/00H04K3/00H04L27/00H04L27/10
    • H04L27/001H04B1/69
    • A field of the spread spectrum transmission of information is performed by chaotic signals. A technical effect consisting in providing direct chaotic communication systems in which the information is input to the chaotic signal generated directly in the information transmission frequency band, is achieved by means of that the step of forming the broadband information carrier necessary for the transmission is carried out using a chaotic dynamic system which structure is synthesized in advance in accordance with predetermined characteristics of said broadband information carrier so as to cause said chaotic dynamic system to provide the operation of forming the broadband information carrier in the form of a chaotic information carrier having prescribed spectral characteristics, the step of modulating the chaotic information carrier is carried out by forming chaotic radio or optic chaotic pulses from said chaotic information carrier, with predetermined time intervals between said pulses in accordance with the transmitted information signal, and the step of reception and demodulation at the receiving side is carried out using a dynamic system matched, in its behavior, with the chaotic dynamic system of the transmitting side.
    • 通过混沌信号进行信息的扩频传输的场。 通过形成传输所需的宽带信息载体的步骤,实现将信息输入到在信息传输频带中直接生成的混沌信号的直接混沌通信系统的技术效果 根据所述宽带信息载体的预定特性,预先合成该结构的混沌动态系统,使得混沌动态系统以具有规定频谱的混沌信息载体的形式提供形成宽带信息载体的操作 通过根据所发送的信息信号,在所述脉冲之间以预定的时间间隔从所述混沌信息载体形成混沌无线电或光混沌脉冲,以及接收和解调步骤来进行调制混沌信息载体的步骤 在接收侧使用动态系统在其行为中与发射侧的混沌动态系统进行匹配。
    • 188. 发明授权
    • Apparatus and method for providing square wave to atomic force microscope
    • 用于向原子力显微镜提供方波的装置和方法
    • US06774692B2
    • 2004-08-10
    • US10124023
    • 2002-04-17
    • Young-hwan KimChung Choo ChungHaiwon Lee
    • Young-hwan KimChung Choo ChungHaiwon Lee
    • H03K3017
    • G01Q60/34H03K5/02H03K5/05Y10S977/85
    • An apparatus and method for providing an input signal having a desired pulse width and amplitude to atomic force miscoscopes (AFMs) for use in nano-lithography are provided. An input signal providing apparatus for a contact type AFM includes: a pulse width adjusting unit which adjusts the width of a positive pulse of an input square wave to a predetermined pulse width; and an amplitude adjusting unit which adjusts the amplitude of the positive pulse of the square wave to a predetermined voltage. An input signal providing method for the contact type AFM uses the apparatus having this structure. An input signal providing apparatus for a non-contact type AFM further includes a square pulse generating unit which generates a square pulse having a predetermined phase in synchronization with an input resonance signal, and an input signal providing method for the non-contact type AFM further involves generating the square pulse having a predetermined phase in synchronization with the input resonance signal. As a result, more precise nano-lithography can be achieved using an AFM to which the apparatus and method described above are applied.
    • 提供了一种用于提供具有期望的脉冲宽度和幅度的输入信号的装置和方法,用于在纳米光刻中使用的原子力测量仪(AFM)。 用于接触型AFM的输入信号提供装置包括:脉冲宽度调整单元,其将输入方波的正脉冲的宽度调整到预定的脉冲宽度; 以及幅度调整单元,其将所述方波的正脉冲的幅度调整到预定电压。 用于接触型AFM的输入信号提供方法使用具有这种结构的装置。 用于非接触型AFM的输入信号提供装置还包括平方脉冲产生单元,其产生与输入谐振信号同步的具有预定相位的方波脉冲,以及用于非接触型AFM的输入信号提供方法 包括与输入的谐振信号同步地产生具有预定相位的平方脉冲。 因此,可以使用应用上述装置和方法的AFM来实现更精确的纳米光刻。