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    Voltage level shifter
    2.
    发明授权
    Voltage level shifter 有权
    电压电平转换器

    公开(公告)号：US08476957B2

    公开(公告)日：2013-07-02

    申请号：US13309155

    申请日：2011-12-01

    申请人： Shinichi Iizuka ,  Jun Kyung Na ,  Sang Hoon Ha ,  Youn Suk Kim

    发明人： Shinichi Iizuka ,  Jun Kyung Na ,  Sang Hoon Ha ,  Youn Suk Kim

    IPC分类号： H03L5/00

    CPC分类号： H03F3/505

    摘要： Provided is a voltage level shifter changing an input voltage level and outputting the input voltage. There is provided the voltage level shifter, including: an operational amplifier having a first input having an applied input voltage thereto; a first MOSFET having a gate connected to an output of the operational amplifier, a source having an applied power thereto, and a drain outputting an output voltage; a voltage dividing resistor unit including a plurality of voltage dividing resistors sequentially connected to the drain of the first MOSFET in series, one connection node between the plurality of voltage dividing resistors being connected to the second input of the operational amplifier; and a second MOSFET having a source and a drain, respectively connected to both ends of at least one of the voltage dividing resistors, and a gate connected to the gate of the first MOSFET.

    摘要翻译： 提供了改变输入电压电平并输出输入电压的电压电平移位器。 提供了电压电平移位器，包括：具有对其施加的输入电压的第一输入的运算放大器; 第一MOSFET，其具有连接到运算放大器的输出的栅极，具有施加功率的源和输出输出电压的漏极; 分压电阻器单元，包括多个分压电阻，其顺序地连接到第一MOSFET的漏极，多个分压电阻器之间的一个连接节点连接到运算放大器的第二输入; 以及分别连接到至少一个分压电阻器的两端的源极和漏极以及连接到第一MOSFET的栅极的栅极的第二MOSFET。

    Bias circuit and power amplifier having the same
    4.
    发明授权
    Bias circuit and power amplifier having the same 有权
    偏置电路和功率放大器具有相同的功能

    公开(公告)号：US08854142B2

    公开(公告)日：2014-10-07

    申请号：US13565417

    申请日：2012-08-02

    申请人： Shinichi Iizuka ,  Youn Suk Kim ,  Jun Goo Won ,  Myeong Woo Han ,  Young Jean Song ,  Ju Young Park ,  Ki Joong Kim

    发明人： Shinichi Iizuka ,  Youn Suk Kim ,  Jun Goo Won ,  Myeong Woo Han ,  Young Jean Song ,  Ju Young Park ,  Ki Joong Kim

    IPC分类号： H03F3/04

    CPC分类号： H03F3/19 ,  H03F1/30

    摘要： There are provided a bias circuit supplying different levels of bias power according to respective power modes through a simple circuit configuration, and a power amplifier having the same. The bias circuit includes: a bias setting unit setting a bias power voltage level by switching reference power having a pre-set voltage level determined according to a pre-set power mode; and a bias supply unit including a switching element performing switching according to the setting of the bias setting unit and supplying bias power having a voltage level determined according to a switching operation of the switching element.

    摘要翻译： 提供了通过简单电路配置根据各自的功率模式提供不同电平的偏置功率的偏置电路，以及具有该偏置电路的功率放大器。 偏置电路包括：偏置设定单元，通过切换具有根据预设功率模式确定的预设电压电平的参考功率来设置偏置功率电压电平; 以及偏置电源单元，包括开关元件，根据偏置设置单元的设置执行切换，并提供具有根据开关元件的开关操作确定的电压电平的偏置功率。

    Power amplifier
    5.
    发明授权
    Power amplifier 有权
    功率放大器

    公开(公告)号：US08629724B2

    公开(公告)日：2014-01-14

    申请号：US13362716

    申请日：2012-01-31

    申请人： Youn Suk Kim ,  Jun Goo Won ,  Shinichi Iizuka ,  Ki Joong Kim

    发明人： Youn Suk Kim ,  Jun Goo Won ,  Shinichi Iizuka ,  Ki Joong Kim

    IPC分类号： H03F3/191

    CPC分类号： H03F1/3205 ,  H03F1/56 ,  H03F3/19 ,  H03F2200/211 ,  H03F2200/213 ,  H03F2200/222

    摘要： There is provided a power amplifier which may suppress fluctuations in a phase of an output signal in accordance with fluctuations in a level of an input signal by varying an impedance between a signal input terminal and an amplification unit in accordance with a power level of an input signal. The power amplifier includes a bias voltage generation unit generating a bias voltage set in accordance with a power level of an input signal, an amplification unit amplifying the power level of the input signal in accordance with the bias voltage, and an impedance variation unit varying an impedance of a signal transmission path through which the input signal is transmitted to the amplification unit in accordance with the bias voltage.

    摘要翻译： 提供了一种功率放大器，其可以根据输入信号的电平的波动来抑制输出信号的相位的波动，通过根据输入的功率电平改变信号输入端子和放大单元之间的阻抗 信号。 功率放大器包括：偏置电压产生单元，其生成根据输入信号的功率电平设定的偏置电压;放大单元，其根据偏置电压放大输入信号的功率电平;以及阻抗变化单元， 根据偏置电压将输入信号传输到放大单元的信号传输路径的阻抗。

    Level shifter
    6.
    发明授权
    Level shifter 有权
    电平移位器

    公开(公告)号：US08525570B2

    公开(公告)日：2013-09-03

    申请号：US13212824

    申请日：2011-08-18

    申请人： Sang Hoon Ha ,  Shinichi Iizuka ,  Youn Suk Kim ,  Jun Kyung Na

    发明人： Sang Hoon Ha ,  Shinichi Iizuka ,  Youn Suk Kim ,  Jun Kyung Na

    IPC分类号： H03L5/00

    CPC分类号： H03K19/0175 ,  H03F2203/45138

    摘要： A level shifter includes: a first buffer amplifier transferring a preset reference voltage to a first output terminal; a second buffer amplifier connected in parallel to the first buffer amplifier and transferring an input voltage to a second output terminal; a positive feedback amplifier connected in parallel to the first buffer amplifier and the second buffer amplifier, and amplifying the input voltage by a preset gain to transfer the amplified input voltage to a third output terminal; and a level regulation unit regulating levels of output signals of the first buffer amplifier, the second buffer amplifier, and the positive feedback amplifier and providing the regulated output signals to a common output node.

    摘要翻译： 电平移位器包括：第一缓冲放大器，将预设参考电压传送到第一输出端; 与第一缓冲放大器并联连接并将输入电压传送到第二输出端的第二缓冲放大器; 与第一缓冲放大器和第二缓冲放大器并联连接的正反馈放大器，并且通过预设增益放大输入电压以将放大的输入电压传送到第三输出端子; 以及电平调节单元，其调节第一缓冲放大器，第二缓冲放大器和正反馈放大器的输出信号的电平，并将调节的输出信号提供给公共输出节点。

    POWER AMPLIFIER SYSTEM
    7.
    发明申请
    POWER AMPLIFIER SYSTEM 审中-公开
    功率放大器系统

    公开(公告)号：US20130049870A1

    公开(公告)日：2013-02-28

    申请号：US13569519

    申请日：2012-08-08

    申请人： Jun Kyung NA ,  Sang Hoon Ha ,  Shinichi Iizuka ,  Youn Suk Kim

    发明人： Jun Kyung NA ,  Sang Hoon Ha ,  Shinichi Iizuka ,  Youn Suk Kim

    IPC分类号： H03F3/04

    CPC分类号： H03F1/0261 ,  H03F3/21

    摘要： Disclosed herein is a power amplifier system, including: a power amplifier; a first regulator generating driving voltage Vd and driving current Id corresponding to preset first reference voltage; a current controller controlling the driving current Id of the first regulator corresponding to applied control voltage; a first resistor connected between the first regulator and the current controller and a second resistor connected between the first regulator and the power amplifier, a bias controller detecting current and voltage corresponding to the driving current and controlling bias current of the power amplifier according to the detected voltage; and a second regulator generating power supply voltage corresponding to preset second reference voltage, whereby characteristics of the power amplifier can be improved by constantly controlling current supplied to the power amplifier even though the input voltage applied to the power amplifier system is increased.

    摘要翻译： 本文公开了一种功率放大器系统，包括：功率放大器; 产生对应于预设的第一参考电压的驱动电压Vd和驱动电流Id的第一调节器; 控制与所施加的控制电压对应的第一调节器的驱动电流Id的电流控制器; 连接在第一调节器和电流控制器之间的第一电阻器和连接在第一调节器和功率放大器之间的第二电阻器，偏置控制器，检测对应于驱动电流的电流和电压，以及根据检测到的功率放大器的控制偏置电流 电压; 以及第二调节器，其产生对应于预设的第二参考电压的电源电压，由此即使施加到功率放大器系统的输入电压增加，也可以通过不断地控制提供给功率放大器的电流来提高功率放大器的特性。

    Low-dropout regulator
    8.
    发明授权
    Low-dropout regulator 有权
    低压差稳压器

    公开(公告)号：US08148961B2

    公开(公告)日：2012-04-03

    申请号：US12859851

    申请日：2010-08-20

    申请人： Sang Hoon Ha ,  Sang Hee Kim ,  Jun Kyung Na ,  Shinichi Iizuka

    发明人： Sang Hoon Ha ,  Sang Hee Kim ,  Jun Kyung Na ,  Shinichi Iizuka

    IPC分类号： G05F1/00

    CPC分类号： G05F1/575

    摘要： A low-dropout regulator includes: a first operational amplifier having a first input receiving an input voltage; a first P-channel MOSFET having a gate connected to an output of the first operational amplifier, a source connected to a power source terminal, and a drain connected to an output terminal; a feedback circuit providing at least portion of a voltage of the output terminal as a feedback to a second input of the first operational amplifier; and a triode limiter circuit receiving voltages at the source and the gate of the first P-channel MOSFET comparing a voltage difference therebetween with a predetermined reference voltage, and increasing a voltage of the second input of the first operational amplifier when the voltage difference is the same as the reference voltage.

    摘要翻译： 低压差稳压器包括：具有接收输入电压的第一输入的第一运算放大器; 第一P沟道MOSFET，其具有连接到第一运算放大器的输出的栅极，连接到电源端子的源极和连接到输出端子的漏极; 反馈电路，其将所述输出端子的电压的至少一部分提供为所述第一运算放大器的第二输入端的反馈; 以及三极限动器电路，其在所述第一P沟道MOSFET的源极和栅极处接收电压，将其间的电压差与预定参考电压进行比较，并且当所述电压差为所述第一运算放大器的电压差时，增加所述第一运算放大器的第二输入的电压 与参考电压相同。

    LEVEL SHIFTER
    9.
    发明申请
    LEVEL SHIFTER 有权
    水平变化

    公开(公告)号：US20120049925A1

    公开(公告)日：2012-03-01

    申请号：US13212824

    申请日：2011-08-18

    申请人： Sang Hoon Ha ,  Shinichi Iizuka ,  Youn Suk Kim ,  Jun Kyung Na

    发明人： Sang Hoon Ha ,  Shinichi Iizuka ,  Youn Suk Kim ,  Jun Kyung Na

    IPC分类号： H03L5/00

    CPC分类号： H03K19/0175 ,  H03F2203/45138

    摘要： A level shifter includes: a first buffer amplifier transferring a preset reference voltage to a first output terminal; a second buffer amplifier connected in parallel to the first buffer amplifier and transferring an input voltage to a second output terminal; a positive feedback amplifier connected in parallel to the first buffer amplifier and the second buffer amplifier, and amplifying the input voltage by a preset gain to transfer the amplified input voltage to a third output terminal; and a level regulation unit regulating levels of output signals of the first buffer amplifier, the second buffer amplifier, and the positive feedback amplifier and providing the regulated output signals to a common output node.

    摘要翻译： 电平移位器包括：第一缓冲放大器，将预设参考电压传送到第一输出端; 与第一缓冲放大器并联连接并将输入电压传送到第二输出端的第二缓冲放大器; 与第一缓冲放大器和第二缓冲放大器并联连接的正反馈放大器，并且通过预设增益放大输入电压以将放大的输入电压传送到第三输出端子; 以及电平调节单元，其调节第一缓冲放大器，第二缓冲放大器和正反馈放大器的输出信号的电平，并将调节的输出信号提供给公共输出节点。

    Image processing system and image processing method
    10.
    发明授权
    Image processing system and image processing method 有权
    图像处理系统和图像处理方法

    公开(公告)号：US07864367B2

    公开(公告)日：2011-01-04

    申请号：US11899470

    申请日：2007-09-06

    申请人： Shinichi Iizuka ,  Toshitsugu Yamamoto

    发明人： Shinichi Iizuka ,  Toshitsugu Yamamoto

    IPC分类号： H04N1/40

    CPC分类号： H04N1/642 ,  H04N1/644

    摘要： A printer divides an input image into a plurality of blocks and extracts a block image corresponding to each of the blocks. The colors of the block image are reduced to, for example, four colors. Index numbers are given to pixels of the color-reduced image, and the four colors are assigned. To a color palette in which color information of the four colors is described in correspondence with the index numbers, object information indicative of the kinds of images (for example, a character, a chart, and a photographic image) is added. Consequently, the handling performance of object information for use in an image processing such as a color conversion process is improved.

    摘要翻译： 打印机将输入图像划分为多个块，并提取与每个块对应的块图像。 块图像的颜色被减少为例如四种颜色。 索引号被赋予减色图像的像素，并且分配四种颜色。 对于与索引号相对应地描述了四种颜色的颜色信息的调色板，添加了指示图像种类（例如，字符，图表和摄影图像）的对象信息。 因此，提高了用于诸如颜色转换处理的图像处理中的对象信息的处理性能。