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29 条记录 (耗时 0.029 秒)

    Low noise amplifier having improved linearity
    2.
    发明授权
    Low noise amplifier having improved linearity 有权
    低噪声放大器具有改善的线性度

    公开(公告)号：US07812672B2

    公开(公告)日：2010-10-12

    申请号：US11976911

    申请日：2007-10-29

    申请人： Seung-Wook Lee ,  Deok Hee Lee ,  Eunseok Song ,  Joonbae Park ,  Kyeongho Lee

    发明人： Seung-Wook Lee ,  Deok Hee Lee ,  Eunseok Song ,  Joonbae Park ,  Kyeongho Lee

    IPC分类号： H03F3/30

    CPC分类号： H03F1/223 ,  H03F3/193 ,  H03F2200/372

    摘要： Embodiments of the present general inventive concept include a low noise amplifier and method with an improved linearity while reducing a noise disadvantage (e.g., increase). One embodiment of a low noise amplifier can include a first transistor to receive an input signal at a control terminal thereof, a second transistor having a first terminal coupled to a second terminal of the first transistor, an envelope detector to output a control signal corresponding to a characteristic of the input signal and an envelope amplifier to amplify the control signal to be applied to a control terminal of the second transistor.

    摘要翻译： 本发明总体构思的实施例包括具有改善的线性度的低噪声放大器和方法，同时降低噪声不利（例如增加）。 低噪声放大器的一个实施例可以包括在其控制端接收输入信号的第一晶体管，具有耦合到第一晶体管的第二端的第一端的第二晶体管，用于输出对应于 输入信号的特性和包络放大器，放大要施加到第二晶体管的控制端的控制信号。

    Bias circuit for smart power amplifier
    3.
    发明申请
    Bias circuit for smart power amplifier 有权
    智能功率放大器的偏置电路

    公开(公告)号：US20050024148A1

    公开(公告)日：2005-02-03

    申请号：US10899470

    申请日：2004-07-26

    申请人： Tae-Jin Kim ,  Seung-Wook Lee ,  Byoung-Soo Kim ,  Yong-Woo Kim ,  Young-Woong Kim ,  Jin-Ho Shin

    发明人： Tae-Jin Kim ,  Seung-Wook Lee ,  Byoung-Soo Kim ,  Yong-Woo Kim ,  Young-Woong Kim ,  Jin-Ho Shin

    IPC分类号： H04B1/40 ,  H03F1/02 ,  H03F1/30 ,  H03F3/04

    CPC分类号： H03F1/025 ,  H03F1/302

    摘要： A bias circuit for a smart power amplifier includes a high power mode bias circuit and a low power mode bias circuit, and operates only one of the bias circuits selectively using a switching circuit according to an input signal. Therefore, the bias circuit of high power mode and the bias circuit of the low power mode are divided and can be optimized according to characteristics of the power. Accordingly, a gain difference with respect to each power can be minimized and the low power mode can be controlled with a small amount of current in a state of initial current with a low power and in a middle power, such that an efficiency of the power amplifier can be improved at low power.

    摘要翻译： 用于智能功率放大器的偏置电路包括高功率模式偏置电路和低功率模式偏置电路，并且仅使用根据输入信号的开关电路来选择性地操作一个偏置电路。 因此，高功率模式的偏置电路和低功耗模式的偏置电路被划分，可以根据电源的特性进行优化。 因此，可以将每个功率的增益差最小化，并且可以在低功率和中功率的初始电流的状态下以少量的电流来控制低功率模式，使得功率的效率 放大器可以在低功耗下进行改进。

    Low noise amplifier having improved linearity
    4.
    发明申请
    Low noise amplifier having improved linearity 有权
    低噪声放大器具有改善的线性度

    公开(公告)号：US20080252377A1

    公开(公告)日：2008-10-16

    申请号：US11976911

    申请日：2007-10-29

    申请人： Seung-Wook Lee ,  Deok Hee Lee ,  Eunseok Song ,  Joonbae Park ,  Kyeongho Lee

    发明人： Seung-Wook Lee ,  Deok Hee Lee ,  Eunseok Song ,  Joonbae Park ,  Kyeongho Lee

    IPC分类号： H03G3/30 ,  H04B1/16

    CPC分类号： H03F1/223 ,  H03F3/193 ,  H03F2200/372

    摘要： Embodiments of the present general inventive concept include a low noise amplifier and method with an improved linearity while reducing a noise disadvantage (e.g., increase). One embodiment of a low noise amplifier can include a first transistor to receive an input signal at a control terminal thereof, a second transistor having a first terminal coupled to a second terminal of the first transistor, an envelope detector to output a control signal corresponding to a characteristic of the input signal and an envelope amplifier to amplify the control signal to be applied to a control terminal of the second transistor.

    摘要翻译： 本发明总体构思的实施例包括具有改善的线性度的低噪声放大器和方法，同时降低噪声不利（例如增加）。 低噪声放大器的一个实施例可以包括在其控制端接收输入信号的第一晶体管，具有耦合到第一晶体管的第二端的第一端的第二晶体管，用于输出对应于 输入信号的特性和包络放大器，放大要施加到第二晶体管的控制端的控制信号。

    Polypropylene-based resin composition for powder slush molding
    7.
    发明授权
    Polypropylene-based resin composition for powder slush molding 有权
    用于粉末搪塑的聚丙烯基树脂组合物

    公开(公告)号：US06906144B2

    公开(公告)日：2005-06-14

    申请号：US10692484

    申请日：2003-10-23

    申请人： Kie Youn Jeong ,  Seung-Wook Lee

    发明人： Kie Youn Jeong ,  Seung-Wook Lee

    IPC分类号： C08J3/00 ,  C08J5/18 ,  C08L9/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  C08L25/04 ,  C08L25/06 ,  C08L25/08 ,  C08L25/10 ,  C08L53/02 ,  C08L91/06

    CPC分类号： C08L23/16 ,  C08L9/06 ,  C08L23/10 ,  C08L23/12 ,  C08L53/02 ,  C08L2666/02 ,  C08L91/06 ,  C08L2666/06 ,  C08L2666/04

    摘要： A polyproplylene-based resin composition for powder slush molding which is a mixture of a polypropylene homopolymer, copolymer, or terpolymer; an olefin rubber; a styrene rubber; a process oil; and a polypropylene wax, wherein the composition is excellent in low-temperature impact resistance and heat resistance and has no offensive odor. The composition can be formed by a cryofreeze pulverization method in the presence of liquid nitrogen into a powder having an average particle size of 200 to 300 μm suitable for powder slush molding. The powder can be adhered to a polyurethane foamed layer and a surface treating agent without a primer coating. The powder is particularly suitable for forming the interior surface for manufacture of an automobile surface such as an instrument panel.

    摘要翻译： 作为聚丙烯均聚物，共聚物或三元共聚物的混合物的粉末搪塑成型用聚丙烯系树脂组合物， 烯烃橡胶; 苯乙烯橡胶; 加工油; 和聚丙烯蜡，其中所述组合物的低温耐冲击性和耐热性优异，并且没有异味。 组合物可以通过冷冻粉碎法在液氮存在下形成平均粒径为200-300μm的粉末，适用于粉末搪塑。 粉末可以粘附到聚氨酯泡沫层和表面处理剂上而不用底漆涂层。 该粉末特别适用于形成用于制造诸如仪表板的汽车表面的内表面。

    System and method for filtering signals in a transceiver
    8.
    发明申请
    System and method for filtering signals in a transceiver 有权
    用于对收发器中的信号进行滤波的系统和方法

    公开(公告)号：US20050048928A1

    公开(公告)日：2005-03-03

    申请号：US10927013

    申请日：2004-08-27

    申请人： Young-Deuk Jeon ,  Seung-Wook Lee ,  Jeong-Woo Lee ,  Joonbae Park ,  Kyeongho Lee

    发明人： Young-Deuk Jeon ,  Seung-Wook Lee ,  Jeong-Woo Lee ,  Joonbae Park ,  Kyeongho Lee

    IPC分类号： H04B1/38

    CPC分类号： H04B1/1027 ,  H03H11/1252 ,  H03H11/1291 ,  H03J1/0008 ,  H04B1/44

    摘要： A system and method for filtering signals in a communications system reduces hardware and chip size requirements by selectively connecting a filter along transmitter and receiver paths of a transceiver. In operation, a controller generated signals for connecting the filter along the transmitter path when the transceiver is in transmitter mode and for connecting the filter along the receiver path when the transmitter is in receiver mode. The controller then generates additional signals for setting one or more parameters of the filter based on the path connected, or put differently based on the operational mode of the transceiver. In a variation, the controller sets the parameters of additional elements coupled to the filter as a way of further controlling processing of the transmitter and receiver signals. The system and method are particularly well suited to controlling the filtering of signals at the front-end of the transceiver having a direct-conversion architecture and in general ones performing time-multiplexing applications.

    摘要翻译： 用于对通信系统中的信号进行滤波的系统和方法通过沿收发器的发射机和接收机路径选择性地连接滤波器来降低硬件和芯片尺寸的要求。 在操作中，当收发器处于发射机模式时，控制器产生用于沿着发射机路径连接滤波器的信号，并且当发射机处于接收机模式时，控制器沿着接收机路径连接滤波器。 然后，控制器产生附加信号，用于基于连接的路径设置滤波器的一个或多个参数，或者基于收发器的操作模式进行不同的设置。 在一个变型中，控制器设置耦合到滤波器的附加元件的参数作为进一步控制发射机和接收机信号的处理的一种方式。 该系统和方法特别适用于控制在具有直接转换架构的收发器的前端处的信号的滤波，并且通常执行时间复用应用。