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29 条记录 (耗时 0.018 秒)

    Variable capacitance circuit having on/off switch for variable capacitance function, and voltage controlled oscillator using the variable capacitance circuit
    2.
    发明授权
    Variable capacitance circuit having on/off switch for variable capacitance function, and voltage controlled oscillator using the variable capacitance circuit 有权
    具有用于可变电容功能的开/关开关的可变电容电路，以及使用可变电容电路的压控振荡器

    公开(公告)号：US07279994B2

    公开(公告)日：2007-10-09

    申请号：US11129312

    申请日：2005-05-16

    申请人： Kotaro Takagi

    发明人： Kotaro Takagi

    IPC分类号： H03L7/09 ,  H03B5/08 ,  H03B5/18 ,  H03H5/12

    CPC分类号： H03J5/244 ,  H03B2200/0062 ,  H03J3/18 ,  H03J3/20

    摘要： A variable capacitance circuit capable of switching on and off a variable capacitance function, includes variable capacitance means formed such that variable capacitance elements whose capacitance values change according to a voltage value of a supplied capacitance control voltage are connected so as to be paired and a plurality pairs of variable capacitance elements are connected in parallel forming multiple stages; bias voltage generation means for generating bias voltages of different voltage values based on a constant voltage from a constant voltage source; and an on-off switch for the variable capacitance function, in which the variable capacitance function of the variable capacitance means is turned on by supplying the bias voltage to the variable capacitance element of each stage of the variable capacitance means and turned off by grounding the bias voltage of each voltage value.

    摘要翻译： 能够接通和断开可变电容功能的可变电容电路包括可变电容装置，其形成为使得电容值根据所提供的电容控制电压的电压值而变化的可变电容元件被连接成成对且多个 成对的可变电容元件并联连接成多级; 偏置电压产生装置，用于基于来自恒定电压源的恒定电压产生不同电压值的偏置电压; 以及用于可变电容功能的开 - 关开关，其中可变电容装置的可变电容功能通过向可变电容装置的每一级的可变电容元件提供偏置电压而导通，并通过接地 每个电压值的偏置电压。

    Resonant circuit and a voltage-controlled oscillator
    3.
    发明授权
    Resonant circuit and a voltage-controlled oscillator 有权
    谐振电路和压控振荡器

    公开(公告)号：US07183870B2

    公开(公告)日：2007-02-27

    申请号：US10893955

    申请日：2004-07-20

    申请人： Kotaro Takagi

    发明人： Kotaro Takagi

    IPC分类号： H03B1/00

    CPC分类号： H03B5/1228 ,  H03B5/1212 ,  H03B5/1231 ,  H03B5/1253 ,  H03B5/1296 ,  H03B2200/0062

    摘要： A voltage-controlled oscillator comprising a resonant circuit and MOS transistors which constitute a negative resistance circuit of a differential structure. The resonant circuit consists of an inductance element and a MOS variable capacitance element connected in parallel therewith. The MOS variable capacitance element is divided into plural pairs connected in parallel with each other. A voltage division circuit generates staircase different-step DC bias voltages to be applied respectively to the gates of the plural divided MOS transistors. The divided MOS variable capacitance elements have a common terminal to which a common control voltage is applied. The resonant circuit is capable of reducing a load on the control voltage generator and improving the characteristics of the voltage-controlled oscillator.

    摘要翻译： 包括构成差分结构的负电阻电路的谐振电路和MOS晶体管的压控振荡器。 谐振电路由与其并联连接的电感元件和MOS可变电容元件组成。 MOS可变电容元件被分成多个并联连接的对。 分压电路产生分别施加到多个分压的MOS晶体管的栅极的阶梯的不同阶段的直流偏置电压。 划分的MOS可变电容元件具有施加公共控制电压的公共端子。 谐振电路能够减小控制电压发生器的负载并改善压控振荡器的特性。

    Radio signal receiving apparatus and demodulating circuit
    4.
    发明授权
    Radio signal receiving apparatus and demodulating circuit 失效
    无线电信号接收装置和解调电路

    公开(公告)号：US07031748B2

    公开(公告)日：2006-04-18

    申请号：US10363793

    申请日：2002-07-09

    申请人： Kotaro Takagi

    发明人： Kotaro Takagi

    IPC分类号： H04B1/40

    CPC分类号： H04B1/005 ,  H04B1/406

    摘要： The object of this invention is to demodulate received signals having different received signal frequencies with the simple circuit configuration. With the present invention, the fixed frequency signals are generated at the fixed PLL unit 310, and simultaneously, the standard frequency signals corresponding respectively to GSM/DCS received RF signals are generated at the channel PLL unit 330. And using the image removal mixer 370 jointly to received RF signals, local oscillation signals having local oscillation frequencies equal to the received signal frequencies of the received RF signals respectively are formed from the fixed frequency signals and the standard frequency signals for receiving. And since the quadrature demodulators 254 and 264 demodulate the received RF signals using corresponding local oscillation signals respectively, the circuit configuration can be simplified by sharing the image removal mixer 370. Thereby, receiving signals having different received signal frequencies can be demodulated with the simple circuit configuration.

    摘要翻译： 本发明的目的是用简单的电路配置来解调具有不同接收信号频率的接收信号。 利用本发明，固定频率信号在固定PLL单元310处产生，同时，在通道PLL单元330处产生分别对应于GSM / DCS接收的RF信号的标准频率信号。并且使用图像去除混频器370 联合地接收RF信号，分别由固定频率信号和用于接收的标准频率信号形成具有等于接收到的RF信号的接收信号频率的本地振荡频率的本地振荡信号。 并且由于正交解调器254和264分别使用对应的本地振荡信号解调所接收的RF信号，所以可以通过共享图像去除混频器370简化电路配置。由此，具有不同接收信号频率的接收信号可以用简单电路 组态。

    Phase locked loop system having an oscillator providing a phase adjustable output under control of a charge pump circuit
    5.
    发明授权
    Phase locked loop system having an oscillator providing a phase adjustable output under control of a charge pump circuit 失效
    锁相环系统具有在电荷泵电路的控制下提供相位可调输出的振荡器

    公开(公告)号：US5153530A

    公开(公告)日：1992-10-06

    申请号：US723165

    申请日：1991-06-28

    申请人： Kotaro Takagi ,  Satoshi Yokoya

    发明人： Kotaro Takagi ,  Satoshi Yokoya

    IPC分类号： H03L7/093 ,  H03L7/089 ,  H03L7/107

    CPC分类号： H03L7/0898 ,  H03L7/0895 ,  H03L7/107

    摘要： A charge pump circuit for charging a capacitor in response to a phase difference between first and second input signals comprises a constant current source for providing a first constant current; a constant current sink for absorbing a second constant current; a circuit for substantially equalizing the magnitudes of the first and second constant currents; and a switching circuit for providing the first constant current and the second constant current flowing in opposed directions to the capacitor through an output terminal of the charge pump circuit in response to the phase difference between the first and second input signals to produce a voltage level across the capacitor corresponding to the phase difference. In a phase locked loop system employing such a charge pump circuit, a phase comparator produces a phase difference signal for controlling the provision of the first and second constant currents by the switching circuit to the capacitor. The capacitor acts as a loop filter supplying the voltage thereacross as a control voltage to a voltage controlled oscillator of the phase locked loop system.

    摘要翻译： 用于响应于第一和第二输入信号之间的相位差对电容器充电的电荷泵电路包括用于提供第一恒定电流的恒定电流源; 用于吸收第二恒定电流的恒定电流吸收器; 用于基本上均衡第一和第二恒定电流的幅度的电路; 以及开关电路，用于响应于第一和第二输入信号之间的相位差，通过电荷泵电路的输出端子向电容器提供沿相反方向流动的第一恒定电流和第二恒定电流，以产生跨越 电容器对应于相位差。 在采用这种电荷泵电路的锁相环系统中，相位比较器产生一个相位差信号，用于控制通过电容器的开关电路提供第一和第二恒定电流。 该电容器作为环路滤波器，作为控制电压提供相位锁相环系统的压控振荡器。

    Resonant circuit and a voltage-controlled oscillator
    7.
    发明申请
    Resonant circuit and a voltage-controlled oscillator 有权
    谐振电路和压控振荡器

    公开(公告)号：US20050030116A1

    公开(公告)日：2005-02-10

    申请号：US10893955

    申请日：2004-07-20

    申请人： Kotaro Takagi

    发明人： Kotaro Takagi

    IPC分类号： H03B5/12 ,  H03B5/08

    CPC分类号： H03B5/1228 ,  H03B5/1212 ,  H03B5/1231 ,  H03B5/1253 ,  H03B5/1296 ,  H03B2200/0062

    摘要： A voltage-controlled oscillator comprising a resonant circuit and MOS transistors which constitute a negative resistance circuit of a differential structure. The resonant circuit consists of an inductance element and a MOS variable capacitance element connected in parallel therewith. The MOS variable capacitance element is divided into plural pairs connected in parallel with each other. A voltage division circuit generates staircase different-step DC bias voltages to be applied respectively to the gates of the plural divided MOS transistors. The divided MOS variable capacitance elements have a common terminal to which a common control voltage is applied. The resonant circuit is capable of reducing a load on the control voltage generator and improving the characteristics of the voltage-controlled oscillator.

    摘要翻译： 包括构成差分结构的负电阻电路的谐振电路和MOS晶体管的压控振荡器。 谐振电路由与其并联连接的电感元件和MOS可变电容元件组成。 MOS可变电容元件被分成多个并联连接的对。 分压电路产生分别施加到多个分压的MOS晶体管的栅极的阶梯的不同阶段的直流偏置电压。 划分的MOS可变电容元件具有施加公共控制电压的公共端子。 谐振电路能够减小控制电压发生器的负载并改善压控振荡器的特性。

    Wireless communication device, router, wireless communication system, and wireless communication method
    8.
    发明授权
    Wireless communication device, router, wireless communication system, and wireless communication method 有权
    无线通信设备，路由器，无线通信系统和无线通信方式

    公开(公告)号：US09294336B2

    公开(公告)日：2016-03-22

    申请号：US13009216

    申请日：2011-01-19

    申请人： Nishiki Mizusawa ,  Kotaro Takagi

    发明人： Nishiki Mizusawa ,  Kotaro Takagi

    IPC分类号： H04W4/00 ,  H04L29/12 ,  H04W28/08 ,  H04W84/12

    CPC分类号： H04L29/12952 ,  H04L61/6077 ,  H04W4/00 ,  H04W28/08 ,  H04W84/12

    摘要： Provided is a router including a network interface that communicates with a network, a first communication interface that communicates with a mobile communication interface of a wireless communication device through a mobile communication control station, a second communication interface that communicates with a wireless LAN interface of the wireless communication device through a wireless LAN control station, and a conversion unit that converts an origin address of one of data to the network received from the mobile communication interface and data to the network received from the wireless LAN interface into an origin address of another one of the data.

    摘要翻译： 提供了一种包括与网络通信的网络接口的路由器，通过移动通信控制站与无线通信设备的移动通信接口通信的第一通信接口，与无线通信设备的无线LAN接口通信的第二通信接口 通过无线LAN控制站的无线通信设备，以及转换单元，其将从移动通信接口接收到的数据之一的数据的原始地址和从无线LAN接口接收到的网络的数据转换为另一个的原始地址 的数据。

    WIRELESS COMMUNICATION DEVICE, ROUTER, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD
    9.
    发明申请
    WIRELESS COMMUNICATION DEVICE, ROUTER, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD 有权
    无线通信设备，路由器，无线通信系统和无线通信方法

    公开(公告)号：US20110182275A1

    公开(公告)日：2011-07-28

    申请号：US13009216

    申请日：2011-01-19

    申请人： Nishiki Mizusawa ,  Kotaro Takagi

    发明人： Nishiki Mizusawa ,  Kotaro Takagi

    IPC分类号： H04W88/06 ,  H04W84/12

    CPC分类号： H04L29/12952 ,  H04L61/6077 ,  H04W4/00 ,  H04W28/08 ,  H04W84/12

    摘要： Provided is a router including a network interface that communicates with a network, a first communication interface that communicates with a mobile communication interface of a wireless communication device through a mobile communication control station, a second communication interface that communicates with a wireless LAN interface of the wireless communication device through a wireless LAN control station, and a conversion unit that converts an origin address of one of data to the network received from the mobile communication interface and data to the network received from the wireless LAN interface into an origin address of another one of the data.

    摘要翻译： 提供了一种路由器，其包括与网络通信的网络接口，通过移动通信控制站与无线通信设备的移动通信接口通信的第一通信接口，与无线通信设备的无线LAN接口通信的第二通信接口 通过无线LAN控制站的无线通信设备，以及转换单元，其将从移动通信接口接收到的数据之一的数据的原始地址和从无线LAN接口接收到的网络的数据转换为另一个的原始地址 的数据。