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    FREQUENCY CONVERTER AND RECEIVER AND TRANSMITTER USING THE SAME
    22.
    发明申请
    FREQUENCY CONVERTER AND RECEIVER AND TRANSMITTER USING THE SAME 审中-公开
    频率转换器和接收器和使用它的发射器

    公开(公告)号：US20090111377A1

    公开(公告)日：2009-04-30

    申请号：US12234730

    申请日：2008-09-22

    申请人： Toshiya Mitomo ,  Rui Ito ,  Shoji Otaka

    发明人： Toshiya Mitomo ,  Rui Ito ,  Shoji Otaka

    IPC分类号： H04B7/14

    CPC分类号： H03D7/165 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466

    摘要： A frequency converter includes a voltage-current converter circuit which generates a positive-phase input current signal and a negative-phase input current signal, a switching circuit which switches between the positive-phase input current signal and the negative-phase input current signal according to a positive-phase local oscillator signal and a negative-phase local oscillator signal to generate a positive-phase output current signal and a negative-phase output current signal, an amplifier circuit which current-voltage converts and amplifies the positive-phase output current signal and negative-phase output current signal to generate a positive-phase output voltage signal and a negative-phase output voltage signal, and a plurality of CR circuits which are inserted at least either between the voltage-current converter circuit and the switching circuit or between the switching circuit and the amplifier circuit and each of which includes at least one capacitor through which high-frequency components pass and at least one resistance through which low-frequency noise components pass.

    摘要翻译： 变频器包括产生正相输入电流信号和负相输入电流信号的电压 - 电流转换器电路，根据正相输入电流信号和负相输入电流信号之间切换的开关电路， 到正相本地振荡器信号和负相位本地振荡器信号以产生正相输出电流信号和负相输出电流信号，电流 - 电压转换和放大正相输出电流的放大器电路 信号和负相输出电流信号，以产生正相输出电压信号和负相输出电压信号，以及至少插入在电压 - 电流转换器电路和开关电路之间的多个CR电路或 在开关电路和放大器电路之间，其中每一个包括至少一个电容器，高频器通过该电容器 ncy分量通过低频噪声分量通过的至少一个电阻。

    RADIO TRANSMITTER USING CARTESIAN LOOP
    23.
    发明申请
    RADIO TRANSMITTER USING CARTESIAN LOOP 有权
    使用卡特彼勒环路的无线电发射机

    公开(公告)号：US20090042521A1

    公开(公告)日：2009-02-12

    申请号：US12188022

    申请日：2008-08-07

    申请人： Shoji Otaka ,  Yuta Araki ,  Toru Hashimoto

    发明人： Shoji Otaka ,  Yuta Araki ,  Toru Hashimoto

    IPC分类号： H04B1/04

    CPC分类号： H04B1/0475 ,  H03F1/34 ,  H03F3/24 ,  H04B2001/0433

    摘要： A radio transmitter including a combiner which combines input I/Q signals with feedback I/Q signals, a power amplifier which amplifies the quadrature modulated signal, a detector which detects amplitude and phase differences between the input and feedback I/Q signals, a switch to turn on and off the feedback I/Q signals, a generator to generate control signals which minimizes the amplitude difference and the phase difference, in a state where a transmission power is set, during for a period during which the switch is turned off, an amplitude adjuster which adjusts an amplitude of the feedback RF signal, during a period during which the switch is turned on, and a phase adjuster which adjusts a phase of the local signal, during the period during which the switch is turned on.

    摘要翻译： 一种无线电发射机，包括将输入I / Q信号与反馈I / Q信号组合的组合器，放大正交调制信号的功率放大器，检测输入和反馈I / Q信号之间的幅度和相位差的检测器，开关 打开和关闭反馈I / Q信号的发生器，用于产生控制信号，在发送功率被设定的状态下，在关闭开关的时段期间使幅度差和相位差最小化的控制信号， 幅度调节器，其在开关导通的时段期间调整反馈RF信号的幅度;以及相位调节器，其在开关接通期间调节本地信号的相位。

    Variable gain amplifier device
    24.
    发明授权
    Variable gain amplifier device 失效

    公开(公告)号：US07031684B2

    公开(公告)日：2006-04-18

    申请号：US09950630

    申请日：2001-09-13

    申请人： Shoji Otaka ,  Takafumi Yamaji

    发明人： Shoji Otaka ,  Takafumi Yamaji

    IPC分类号： H04B7/00 ,  H03F3/45

    CPC分类号： H03F3/45183 ,  H03F2203/45246 ,  H03G1/0029 ,  H03G7/06

    摘要： A variable gain amplifier device controlled by a first gain control signal comprises a gain controlled amplifier having a gain and including a differential pair of first and second MOS type transistors configured to operate in a weak inversion region; and a control signal converter configured to convert the first gain control signal into a second gain control signal, and supply the second gain control signal to the gain controlled amplifier to exponentially vary the gain with respect to the first gain control signal.

    Receiver
    26.
    发明授权
    Receiver 失效
    接收器

    公开(公告)号：US06714604B1

    公开(公告)日：2004-03-30

    申请号：US09604838

    申请日：2000-06-27

    申请人： Hiroshi Tsurumi ,  Hiroshi Yoshida ,  Shoji Otaka ,  Hiroshi Tanimoto

    发明人： Hiroshi Tsurumi ,  Hiroshi Yoshida ,  Shoji Otaka ,  Hiroshi Tanimoto

    IPC分类号： H04B126

    CPC分类号： H04B1/0014 ,  H04B1/0007 ,  H04B1/0039 ,  H04B1/28

    摘要： An orthogonal demodulating section converts the frequency of received signals to the lower range in batch after rejecting an image band thereof by an RF filter. An image rejecting section rejects the image band of the orthogonally converted output. It allows an enough image rejecting degree to be obtained. An A/D converter section converts the whole range into a digital signal and an orthogonal demodulating section demodulates a desirable channel by means of digital processing. Then, a channel selecting section selects and outputs the desirable channel. It then allows wide-bands to be received in batch, flexible processing to be achieved by the digital processing and an enough image rejecting degree to be obtained.

    摘要翻译： 正交解调部在通过RF滤波器拒绝其图像频带之后，将接收信号的频率分批转换为较低范围。 图像拒绝部分拒绝正交转换输出的图像带。 它允许获得足够的图像拒绝度。 A / D转换器部分将整个范围转换为数字信号，并且正交解调部分通过数字处理解调期望的信道。 然后，频道选择部分选择并输出所需频道。 然后允许批量接收宽带，通过数字处理实现灵活处理，并获得足够的图像拒绝度。

    Frequency conversion circuit and radio communication apparatus with the same
    27.
    发明授权
    Frequency conversion circuit and radio communication apparatus with the same 失效
    变频电路和无线通信装置相同

    公开(公告)号：US5742189A

    公开(公告)日：1998-04-21

    申请号：US528008

    申请日：1995-09-14

    申请人： Hiroshi Yoshida ,  Miyuki Ogura ,  Koji Iino ,  Shoji Otaka

    发明人： Hiroshi Yoshida ,  Miyuki Ogura ,  Koji Iino ,  Shoji Otaka

    IPC分类号： H03D7/16 ,  H04B1/26 ,  H02M5/00

    CPC分类号： H04B1/0017 ,  H03D7/161 ,  H04B1/0003 ,  H04B1/001 ,  H04B1/26

    摘要： A frequency conversion apparatus comprising a sampling circuit for receiving a first intermediate frequency signal extracted from an input signal and having a predetermined intermediate frequency and a predetermined band width and sampling the first intermediate frequency signal in accordance with a predetermined sampling frequency signal, to output a second intermediate frequency signal, and a sampling signal generator for outputting the sampling frequency signal to the sampling circuit, the sampling frequency signal having a frequency determined so that an integer multiple of not less than three times the sampling frequency is outside a frequency range of the input signal.

    摘要翻译： 一种频率转换装置，包括：采样电路，用于接收从输入信号提取的具有预定中频和预定带宽的第一中频信号，并根据预定采样频率信号对第一中频信号进行采样，以输出 第二中频信号和用于将采样频率信号输出到采样电路的采样信号发生器，所述采样频率信号的频率被确定为使得采样频率不小于三倍的整数倍在该频率范围之外 输入信号。

    Oscillator and radio communication device
    28.
    发明授权
    Oscillator and radio communication device 有权
    振荡器和无线电通信设备

    公开(公告)号：US09515606B2

    公开(公告)日：2016-12-06

    申请号：US13526005

    申请日：2012-06-18

    申请人： Toshiyuki Umeda ,  Shoji Otaka

    发明人： Toshiyuki Umeda ,  Shoji Otaka

    IPC分类号： H04B1/38 ,  H03L1/00 ,  H03B5/12 ,  H03D11/02

    CPC分类号： H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03D11/02

    摘要： According to an embodiment, there is provided with an oscillator including: a clock circuit, a power supply current source and an oscillating circuit wherein the clock circuit generates a clock signal, the power supply current source generates a power supply current according to the clock signal, and the oscillating circuit generates an oscillation signal of a higher frequency than a frequency of the clock signal based on the power supply current and a received signal from an input terminal, the received signal having amplitude of a predetermined level or more.

    摘要翻译： 根据实施例，提供了一种振荡器，包括：时钟电路，电源电流源和振荡电路，其中时钟电路产生时钟信号，电源电流源根据时钟信号产生电源电流 并且振荡电路基于电源电流和来自输入端的接收信号产生比时钟信号的频率高的频率的振荡信号，所接收的信号具有预定电平或更大的振幅。

    Radio apparatus
    29.
    发明授权
    Radio apparatus 有权
    无线电设备

    公开(公告)号：US08958767B2

    公开(公告)日：2015-02-17

    申请号：US13422636

    申请日：2012-03-16

    申请人： Shoji Otaka ,  Takafumi Yamaji ,  Tsutomu Sugawara ,  Yasuhiko Tanabe ,  Masahiro Hosoya ,  Hiroki Sakurai

    发明人： Shoji Otaka ,  Takafumi Yamaji ,  Tsutomu Sugawara ,  Yasuhiko Tanabe ,  Masahiro Hosoya ,  Hiroki Sakurai

    IPC分类号： H04B1/06 ,  H04W52/02 ,  H03L7/08 ,  H03L7/197 ,  H04L25/02 ,  H04L27/38

    CPC分类号： H04W52/0274 ,  H03L7/0802 ,  H03L7/1976 ,  H03L2207/50 ,  H04L25/0292 ,  H04L27/38 ,  H04L27/3818 ,  H04W52/0229 ,  Y02D70/142

    摘要： A radio apparatus includes an antenna; an amplifier that amplifies a radio signal, received via the antenna; a first mixer that frequency converts the amplified radio signal to generate a first analog signal; a first A/D converter that converts the first analog signal to generate a first digital signal; a second mixer that frequency converts the amplified signal to generate a second analog signal; a second A/D converter means that converts the second analog signal to generate a second digital signal; a demodulator means that demodulates the first and second digital signals to generate a demodulated signal; a detector that detects a preamble from the first digital signal; and a control means that halts the second mixer and second A/D converter during the wait for the radio signal and that activates the second mixer and second A/D converter when the detector detects the preamble.

    摘要翻译： 无线电设备包括天线; 放大器，放大经由天线接收的无线电信号; 第一混频器，其对放大的无线电信号进行频率转换以产生第一模拟信号; 第一A / D转换器，其转换第一模拟信号以产生第一数字信号; 第二混频器，其对放大的信号进行频率转换以产生第二模拟信号; 第二A / D转换器，用于转换第二模拟信号以产生第二数字信号; 解调器装置，解调第一和第二数字信号以产生解调信号; 检测器，其从所述第一数字信号检测前导码; 以及控制装置，其在等待无线电信号期间停止第二混频器和第二A / D转换器，并且当检测器检测到前导码时激活第二混频器和第二A / D转换器。