利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

624 条记录 (耗时 0.017 秒)

    CABLE MODEM
    111.
    发明申请
    CABLE MODEM 失效
    电缆调制解调器

    公开(公告)号：US20110103441A1

    公开(公告)日：2011-05-05

    申请号：US12647998

    申请日：2009-12-28

    申请人： LIANG ZHANG ,  CHENG-YU WU

    发明人： LIANG ZHANG ,  CHENG-YU WU

    IPC分类号： H04L5/16

    CPC分类号： H04L25/0278 ,  H03F1/56 ,  H03F3/08 ,  H03F3/189 ,  H03F2200/387 ,  H03F2200/414 ,  H03F2200/417 ,  H03F2200/555

    摘要： A cable modem includes an amplifier, a power module, a switch circuit, a monitor signal, a duplexer and a RF matching circuit. The switch includes a PMOS transistor and a first electronic switch. The RF matching circuit included a second electronic switch and an electronic matching device. The monitoring signal source is configured for outputting a control signal. When the monitoring signal source stops outputting the control signal, both the first electronic switch and the PMOS transistor are turned off to cut off the power to the amplifier, the second electronic switch is turned on, and conducts the RF signal received by the signal receiving/transmitting circuit to the duplexer which further conducts the RF signal to the radio frequency matching circuit.

    摘要翻译： 电缆调制解调器包括放大器，电源模块，开关电路，监视器信号，双工器和RF匹配电路。 开关包括PMOS晶体管和第一电子开关。 RF匹配电路包括第二电子开关和电子匹配装置。 监视信号源被配置为输出控制信号。 当监视信号源停止输出控制信号时，第一电子开关和PMOS晶体管两者都被断开以切断放大器的电源，第二电子开关导通，并且传导由接收的信号接收到的RF信号 /发送电路到双工器，进一步将RF信号传送到射频匹配电路。

    Power supply circuit for a phase-locked loop
    113.
    发明申请
    Power supply circuit for a phase-locked loop 有权
    用于锁相环的电源电路

    公开(公告)号：US20080136472A1

    公开(公告)日：2008-06-12

    申请号：US11634993

    申请日：2006-12-07

    申请人： Joseph Shor

    发明人： Joseph Shor

    IPC分类号： G05F1/577 ,  H03L7/08

    CPC分类号： H03L7/08 ,  H03F3/345 ,  H03F2200/555

    摘要： A power supply circuit includes a first voltage regulator to generate a first supply voltage for a first circuit of a phase-locked loop and a second voltage regulator to generate a second supply voltage for a second circuit of the phase-locked loop. The first and second supply voltages are independently generated by the first and second voltage regulators based on the same reference signal. The first circuit may be a charge pump and the second circuit may be a voltage-controlled oscillator. Different circuits may be supplied with the independently generated supply voltages in alternative embodiments.

    摘要翻译： 电源电路包括：第一电压调节器，用于产生用于锁相环的第一电路的第一电源电压;以及第二电压调节器，用于为锁相环的第二电路产生第二电源电压。 第一和第二电源电压由第一和第二调压器基于相同的参考信号独立产生。 第一电路可以是电荷泵，第二电路可以是压控振荡器。 在替代实施例中，可以向独立产生的电源电压提供不同的电路。

    High frequency power amplifier, high frequency power amplifier module, and portable telephone
    114.
    发明申请
    High frequency power amplifier, high frequency power amplifier module, and portable telephone 有权
    高频功率放大器，高频功率放大器模块和便携式电话

    公开(公告)号：US20030048132A1

    公开(公告)日：2003-03-13

    申请号：US10192589

    申请日：2002-07-11

    申请人： Hitachi, Ltd

    发明人： Osamu Kagaya ,  Masami Ohnishi ,  Kenji Sekine ,  Tomonori Tanoue

    IPC分类号： H03F001/14 ,  H03F003/68

    CPC分类号： H03F3/602 ,  H03F1/0277 ,  H03F1/302 ,  H03F1/56 ,  H03F3/195 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/222 ,  H03F2200/318 ,  H03F2200/387 ,  H03F2200/411 ,  H03F2200/429 ,  H03F2200/555 ,  H03F2203/7206 ,  H03F2203/7215 ,  H03F2203/7221 ,  H03F2203/7231 ,  H03F2203/7236

    摘要： To provide a small-sized high frequency power amplifier for preventing oscillation by a small number of switching circuits and outputting high power and low power with high efficiencies, a high frequency power amplifier module and a portable telephone, the high frequency power amplifier is constituted by an amplifying circuit A and an amplifying circuit B connected in parallel, a size of a transistor at an output stage of the amplifying circuit B is made to be equal to or smaller than null of a size of a transistor of an output stage of the amplifying circuit A and a switching circuit is connected between a signal line forward from the output stage of the amplifying circuit A and a ground terminal. Further, when the transistor constituting the amplifying circuit B is brought into a nonoperational state and the switching circuit is made OFF, a high frequency signal of high power is outputted from the amplifying circuit A and when the transistor constituting the amplifying circuit A is brought into a nonoperational state and the switching circuit is made ON, a high frequency signal of low power is outputted from the amplifying circuit B.

    摘要翻译： 为了提供一种小型高频功率放大器，用于防止少量开关电路的振荡并以高效率输出高功率和低功率，高频功率放大器模块和便携式电话，高频功率放大器由 放大电路A和放大电路B并联连接，将放大电路B的输出级的晶体管的尺寸设定为放大电路的输出级的晶体管的尺寸的1/4 电路A和开关电路连接在从放大电路A的输出级向前方的信号线与接地端子之间。 此外，当构成放大电路B的晶体管处于非工作状态并且使开关电路截止时，从放大电路A输出高功率的高频信号，并且当构成放大电路A的晶体管进入 非工作状态并且开关电路导通，从放大电路B输出低功率的高频信号。