利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

198 条记录 (耗时 0.024 秒)

    Wireless transmitter and amplifier
    1.
    发明授权
    Wireless transmitter and amplifier 有权
    无线发射机和放大器

    公开(公告)号：US07489910B2

    公开(公告)日：2009-02-10

    申请号：US11387568

    申请日：2006-03-23

    申请人： Takayuki Kato ,  Hiroshi Yoshida ,  Ichiro Seto ,  Keiichi Yamaguchi

    发明人： Takayuki Kato ,  Hiroshi Yoshida ,  Ichiro Seto ,  Keiichi Yamaguchi

    IPC分类号： H03C7/02 ,  H04B1/02

    CPC分类号： H03F3/72 ,  H03F1/0288 ,  H03F3/24 ,  H03F3/602 ,  H03F2200/111 ,  H03F2200/423 ,  H03F2200/429 ,  H04B1/0483 ,  H04B2001/0408

    摘要： There is provided with an amplifier comprising: first and second power amplifiers; a first path configured to output first and second input signals to the first and second power amplifiers; a second path configured to divide a first input signal, output one of divided signals to the first power amplifier and output the other divided signal to the second power amplifier; a first path changeover unit configured to change over the first and second paths; a third path configured to output first and second power amplified signals from the first and second power amplifiers; a fourth path configured to combines a first power amplified signal through an impedance conversion unit from the first power amplifier and a second power amplified signal from the second power amplifier at a combining point and output a combined signal; and a second path changeover unit configured to changeover the third and fourth paths.

    摘要翻译： 提供了一种放大器，包括：第一和第二功率放大器; 第一路径，被配置为将第一和第二输入信号输出到所述第一和第二功率放大器; 第二路径，被配置为分割第一输入信号，将分频信号中的一个输出到第一功率放大器，并将另一个分频信号输出到第二功率放大器; 第一路径切换单元，被配置为切换第一和第二路径; 第三路径，被配置为从所述第一和第二功率放大器输出第一和第二功率放大信号; 第四路径，被配置为通过来自第一功率放大器的阻抗转换单元和来自第二功率放大器的组合点的第二功率放大信号组合第一功率放大信号并输出​​组合信号; 以及第二路径切换单元，被配置为切换第三路径和第四路径。

    Radio transmission apparatus and radio transmission method
    2.
    发明授权
    Radio transmission apparatus and radio transmission method 有权

    公开(公告)号：US07127268B2

    公开(公告)日：2006-10-24

    申请号：US10175783

    申请日：2002-06-21

    申请人： Takayuki Kato ,  Hiroshi Yoshida

    发明人： Takayuki Kato ,  Hiroshi Yoshida

    IPC分类号： H04B1/38

    CPC分类号： H04B1/406

    摘要： According to the present invention, there is disclosed a radio transmitter comprising: a signal processing section which outputs a control signal for designating one of first and second communication systems and a base band signal; a frequency synthesizer for outputting an LO signal corresponding to the control signal; a quadrature modulator into which the base band signal and LO signal are inputted; a first terminal for the first communication system; a second terminal for the second communication system; a first radio section which is disposed between the quadrature modulator and the first terminal and corresponds to the first communication system; a second radio section which is disposed between the quadrature modulator and the second terminal and corresponds to the second communication system; and a switch which passes an output signal from the quadrature modulator through any one of the first and second radio sections in response to the control signal.

    Radio receiver and radio receiving method
    3.
    发明申请
    Radio receiver and radio receiving method 失效

    公开(公告)号：US20060068734A1

    公开(公告)日：2006-03-30

    申请号：US11280315

    申请日：2005-11-17

    申请人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    发明人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    IPC分类号： H04B7/00 ,  H04B1/06

    CPC分类号： H03G3/3068 ,  H03G3/3052 ,  H04B1/30

    摘要： A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.

    Radio receiver and radio receiving method
    4.
    发明授权
    Radio receiver and radio receiving method 失效
    无线电接收机和无线电接收方法

    公开(公告)号：US07555274B2

    公开(公告)日：2009-06-30

    申请号：US11280315

    申请日：2005-11-17

    申请人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    发明人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    IPC分类号： H04B1/06 ,  H04B7/00

    CPC分类号： H03G3/3068 ,  H03G3/3052 ,  H04B1/30

    摘要： A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.

    摘要翻译： 无线电接收机包括放大An RF信号的LNA，使用LO信号将放大的RF信号直接解调为B / B信号的正交解调器，放大B / B信号的VGA; DC偏移消除器，其执行 放大的B / B信号的反馈控制以及至少控制LNA的增益的增益控制器，增益控制器包括检测放大的B / B信号的强度的信号强度检测器，选择一个 基于检测到的强度来预期的预设增益之一，控制切换到所选择的期望增益的定时的定时控制器;以及增益控制信号发生器，其根据受控定时改变LNA增益的间隔 产生控制信号。

    Radio receiver and radio receiving method
    5.
    发明授权
    Radio receiver and radio receiving method 失效
    无线电接收机和无线电接收方法

    公开(公告)号：US07272371B2

    公开(公告)日：2007-09-18

    申请号：US10327104

    申请日：2002-12-24

    申请人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    发明人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    IPC分类号： H04B1/06 ,  H04B7/00

    CPC分类号： H03G3/3068 ,  H03G3/3052 ,  H04B1/30

    摘要： A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.

    摘要翻译： 无线电接收机包括放大An RF信号的LNA，使用LO信号将放大的RF信号直接解调为B / B信号的正交解调器，放大B / B信号的VGA; DC偏移消除器，其执行 放大的B / B信号的反馈控制以及至少控制LNA的增益的增益控制器，增益控制器包括检测放大的B / B信号的强度的信号强度检测器，选择 基于检测到的强度来预期的预设增益之一，控制切换到所选择的期望增益的定时的定时控制器;以及增益控制信号发生器，其根据受控定时改变LNA增益的间隔 产生控制信号。

    Radio receiver and radio receiving method
    6.
    发明授权
    Radio receiver and radio receiving method 失效

    公开(公告)号：US07515890B2

    公开(公告)日：2009-04-07

    申请号：US11280331

    申请日：2005-11-17

    申请人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    发明人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    IPC分类号： H04B1/06 ,  H04B7/00

    CPC分类号： H03G3/3068 ,  H03G3/3052 ,  H04B1/30

    摘要： A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.

    RADIO TRANSMISSION APPARATUS AND RADIO TRANSMISSION METHOD
    7.
    发明申请
    RADIO TRANSMISSION APPARATUS AND RADIO TRANSMISSION METHOD 审中-公开
    无线电传输装置和无线传输方法

    公开(公告)号：US20070087702A1

    公开(公告)日：2007-04-19

    申请号：US11539226

    申请日：2006-10-06

    申请人： Takayuki Kato ,  Hiroshi Yoshida

    发明人： Takayuki Kato ,  Hiroshi Yoshida

    IPC分类号： H04B1/02 ,  H04B1/66

    CPC分类号： H04B1/406

    摘要： According to the present invention, there is disclosed a radio transmitter comprising: a signal processing section which outputs a control signal for designating one of first and second communication systems and a base band signal; a frequency synthesizer for outputting an LO signal corresponding to the control signal; a quadrature modulator into which the base band signal and LO signal are inputted; a first terminal for the first communication system; a second terminal for the second communication system; a first radio section which is disposed between the quadrature modulator and the first terminal and corresponds to the first communication system; a second radio section which is disposed between the quadrature modulator and the second terminal and corresponds to the second communication system; and a switch which passes an output signal from the quadrature modulator through any one of the first and second radio sections in response to the control signal.

    摘要翻译： 根据本发明，公开了一种无线电发射机，包括：信号处理部，其输出用于指定第一和第二通信系统之一的控制信号和基带信号; 频率合成器，用于输出对应于控制信号的LO信号; 输入基带信号和LO信号的正交调制器; 第一通信系统的第一终端; 第二通信系统的第二终端; 第一无线电部分，设置在正交调制器和第一终端之间，并对应于第一通信系统; 第二无线电部分，设置在正交调制器和第二终端之间，并对应于第二通信系统; 以及响应于控制信号使来自正交调制器的输出信号通过第一和第二无线电部分中的任一个传递的开关。

    Radio receiver and radio receiving method
    9.
    发明申请
    Radio receiver and radio receiving method 失效

    公开(公告)号：US20060068735A1

    公开(公告)日：2006-03-30

    申请号：US11280331

    申请日：2005-11-17

    申请人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    发明人： Takehiko Toyoda ,  Hiroshi Yoshida ,  Takayuki Kato

    IPC分类号： H04B7/00 ,  H04B1/26 ,  H04B1/06

    CPC分类号： H03G3/3068 ,  H03G3/3052 ,  H04B1/30

    摘要： A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.