公开(公告)号：US08229384B2

公开(公告)日：2012-07-24

申请号：US12419355

申请日：2009-04-07

申请人： Masaaki Yamada ,  Yusaku Katsube ,  Junichi Takahashi ,  Toshihito Habuka ,  Fumihito Yamaguchi

发明人： Masaaki Yamada ,  Yusaku Katsube ,  Junichi Takahashi ,  Toshihito Habuka ,  Fumihito Yamaguchi

IPC分类号： H04B1/06

CPC分类号： H03H7/0153 ,  H03H7/1708 ,  H03H7/24 ,  H03H7/425

摘要： A filter circuit includes first capacitors, second capacitors capable of altering a cutoff frequency by being connected in parallel with the first capacitors, first switches for connecting the second capacitors in parallel with the first capacitors, and charging circuits for the second capacitors. The charging circuits include second switches, and resistances for attenuating the amplitudes of input voltages to be fed to the second capacitors, by being connected in series with the second capacitors. The second capacitors are charged through the resistances in a state where the first switches are turned OFF and where the second switches are turned ON. Thus, a DC offset which is ascribable to the cutoff frequency switching of a filter is reduced.

摘要翻译： 滤波器电路包括第一电容器，能够通过与第一电容器并联连接来改变截止频率的第二电容器，用于将第二电容器与第一电容器并联连接的第一开关和用于第二电容器的充电电路。 充电电路包括第二开关和用于衰减要馈送到第二电容器的输入电压的振幅的电阻，通过与第二电容器串联连接。 在第一开关断开的状态和第二开关导通的状态下，通过电阻对第二电容器进行充电。 因此，降低了归因于滤波器的截止频率切换的DC偏移。

公开(公告)号：US08538364B2

公开(公告)日：2013-09-17

申请号：US12789771

申请日：2010-05-28

申请人： Yusaku Katsube ,  Junichi Takahashi ,  Masaaki Yamada ,  Toshihito Habuka ,  Kenichi Shibata ,  Fumihito Yamaguchi

发明人： Yusaku Katsube ,  Junichi Takahashi ,  Masaaki Yamada ,  Toshihito Habuka ,  Kenichi Shibata ,  Fumihito Yamaguchi

IPC分类号： H04B1/10 ,  H04K3/00

CPC分类号： H04B1/30 ,  H03H7/0153 ,  H03H11/1291 ,  H03H2210/012 ,  H03H2210/025 ,  H03H2210/036 ,  H03H2250/00

摘要： Gain setting can be performed at high speed while reducing DC offset due to a filter cutoff frequency changeover without the need for input signal muting. A filter circuit having first and second filters is capable of allowing settings of first and second cutoff frequencies. First and second filter switch circuits and a charging circuit including a charging resistor and a charging switch are provided. For a first time period, the first switch circuit is controllably turned on while the second switch circuit is controllably turned off, thereby providing the first filter function. For a second time period, the first switch circuit is controllably turned off while the second switch circuit is controllably turned on, thereby providing the second filter function. For the first time period, the charging switch is controllably turned on so that the second capacitor is charged via the charging resistor.

摘要翻译： 增益设置可以高速执行，同时减少由于滤波器截止频率切换引起的直流偏移，而不需要输入信号静音。 具有第一和第二滤波器的滤波器电路能够允许第一和第二截止频率的设置。 提供第一和第二滤波器开关电路以及包括充电电阻器和充电开关的充电电路。 在第一时间段中，第一开关电路被可控地导通，而第二开关电路被可控地关断，从而提供第一滤波器功能。 对于第二时间段，第一开关电路在第二开关电路被可控地接通的同时被可控制地截止，从而提供第二滤波器功能。 在第一时间段中，充电开关被可控地导通，使得第二电容器经由充电电阻器充电。

公开(公告)号：US08301208B2

公开(公告)日：2012-10-30

申请号：US12472741

申请日：2009-05-27

申请人： Yusaku Katsube ,  Masaaki Yamada ,  Junichi Takahashi

发明人： Yusaku Katsube ,  Masaaki Yamada ,  Junichi Takahashi

IPC分类号： H04M1/00 ,  H04B1/38

CPC分类号： H04L27/3854 ,  H04L7/041 ,  H04L27/0014

摘要： The receiver includes a low noise amplifier, a local signal generator, a first mixer, a second mixer, a first amplifier, a second amplifier, a first A/D converter, a second A/D converter, and a signal level detection unit. A detection signal from at least one terminal of the first A/D converter is supplied to an input terminal of the signal level detection unit, thereby generating a reception start signal from the output terminal. Before an RF reception signal is received, a first signal processing unit containing the first mixer, the first amplifier, and the first A/D converter is controlled to an active state, and a second signal processing unit containing the second mixer, the second amplifier, and the second A/D converter is controlled to a low power consumption state. After the RF reception signal is received, the second signal processing unit is controlled to the active state.

摘要翻译： 接收机包括低噪声放大器，本地信号发生器，第一混频器，第二混频器，第一放大器，第二放大器，第一A / D转换器，第二A / D转换器和信号电平检测单元。 来自第一A / D转换器的至少一个端子的检测信号被提供给信号电平检测单元的输入端，从而从输出端产生接收开始信号。 在接收到RF接收信号之前，将包含第一混频器，第一放大器和第一A / D转换器的第一信号处理单元控制为有效状态，以及包含第二混频器的第二信号处理单元，第二放大器 并且第二A / D转换器被控制到低功耗状态。 在RF接收信号被接收之后，第二信号处理单元被控制到活动状态。

公开(公告)号：US07945232B2

公开(公告)日：2011-05-17

申请号：US11769151

申请日：2007-06-27

申请人： Yoshikazu Sugiyama ,  Satoshi Adachi ,  Yusaku Katsube ,  Masazumi Tone ,  Taku Takaki

发明人： Yoshikazu Sugiyama ,  Satoshi Adachi ,  Yusaku Katsube ,  Masazumi Tone ,  Taku Takaki

IPC分类号： H04B1/28

CPC分类号： H03F3/195 ,  H03F1/22 ,  H03F1/565 ,  H03F3/24 ,  H03F2200/108 ,  H03F2200/111 ,  H03F2200/294 ,  H03F2200/381 ,  H03F2200/387 ,  H03F2200/391 ,  H03F2200/451 ,  H03F2200/519 ,  H03F2200/75

摘要： When switching over from a portable telephone system of 800 MHz band to a UWB communication system of 9 GHz band, depending upon a signal for changing over a high pass filter and a low pass filter, a reactance element, which is determined to be matching with a load Z of the high pass filter, is connected to an output terminal of a transmitting power amplifier. With this, it is possible to achieve a multi-band or multi-mode wireless receiver of using a frequency band from 800 MHz to 10 GHz, without an enlargement of a circuit scale and an increase of costs.

摘要翻译： 当从800MHz频带的便携式电话系统切换到9GHz频带的UWB通信系统时，根据用于切换高通滤波器和低通滤波器的信号，确定为匹配的电抗元件 高通滤波器的负载Z连接到发射功率放大器的输出端。 由此，可以实现使用800MHz至10GHz的频带的多频带或多模式无线接收机，而不会扩大电路规模并增加成本。

公开(公告)号：US07805123B2

公开(公告)日：2010-09-28

申请号：US11737802

申请日：2007-04-20

申请人： Yoshikazu Sugiyama ,  Isao Ikuta ,  Yusaku Katsube

发明人： Yoshikazu Sugiyama ,  Isao Ikuta ,  Yusaku Katsube

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H04L27/2067 ,  H03C1/52 ,  H03C3/00 ,  H04B1/7136 ,  H04B1/71635

摘要： A technique of frequency hopping communication capable of high-speed switching of a plurality of signals having ultra-wide band 528 MHz bandwidth at high-speed and setting and switching a band center frequency and the number of bands arbitrary is provided. A radio transceiver has a frequency hopping communication function of UWB system for switching the ultra wide band signal. In the device, high-speed frequency hopping is realized by controlling an SSB mixer in a local oscillator circuit and switching the frequency of a DDS. The device sets NCO data to the DDS and switches a quadrature phase signal of an output, and switches a signal input of an input terminal of the SSB mixer by a control of a phase switching switch. One of a sum component and a difference component of a mixture of first and second quadrature phase signals is outputted from the output terminal of the SSB mixer.

摘要翻译： 提供一种跳频通信技术，其能够高速切换具有超宽带528MHz带宽的多个信号，并且设置和切换频带中心频率和频带数量的跳频通信。 无线电收发器具有用于切换超宽带信号的UWB系统的跳频通信功能。 在设备中，通过在本地振荡器电路中控制SSB混频器并切换DDS的频率来实现高速跳频。 该装置将NCO数据设置为DDS并切换输出的正交相位信号，并通过相位切换开关的控制切换SSB混频器的输入端的信号输入。 从SSB混频器的输出端子输出第一和第二正交相位信号的混合的和分量和差分分量之一。

公开(公告)号：US20070190961A1

公开(公告)日：2007-08-16

申请号：US11585996

申请日：2006-10-25

申请人： Yutaka Igarashi ,  Yusaku Katsube ,  Akio Yamamoto

发明人： Yutaka Igarashi ,  Yusaku Katsube ,  Akio Yamamoto

IPC分类号： H04B1/06 ,  H04B1/28

CPC分类号： H04B1/30

摘要： In a signal receiving circuit of a direct conversion system applied with a semiconductor integrated circuit for radio communication having a PLL requiring a clock signal, an LNA requiring low-noise receiving characteristics, and others, a variable coupling line is provided between clock signal buffers and at an input stage of the PLL, so that coupling between the variable coupling line and an input terminal of the LNA and coupling between the variable coupling line and a GND terminal of the LNA are made equal to each other at frequencies of higher harmonic waves of a clock signal. When the input terminal and the GND terminal of the LNA are excited at the same phase, since no output occurs at an output terminal of the LNA, an output of the LNA does not contain any higher harmonic wave of a clock signal.

摘要翻译： 在应用于具有需要时钟信号的PLL的无线电通信用半导体集成电路的直接转换系统的信号接收电路中，需要低噪声接收特性的LNA等，在时钟信号缓冲器和 在PLL的输入级，使得可变耦合线与LNA的输入端之间的耦合以及可变耦合线与LNA的GND端之间的耦合使得在高次谐波的频率处彼此相等 一个时钟信号。 当LNA的输入端子和GND端子在相同相位被激励时，由于在LNA的输出端子处没有输出，所以LNA的输出不包含时钟信号的任何高次谐波。

公开(公告)号：US20050233726A1

公开(公告)日：2005-10-20

申请号：US11059610

申请日：2005-02-15

申请人： Yusaku Katsube ,  Koichi Terui

发明人： Yusaku Katsube ,  Koichi Terui

IPC分类号： H04M1/00 ,  H04M11/00 ,  H04W4/20 ,  H04W4/22 ,  H04W76/06 ,  H04Q7/20

CPC分类号： H04W4/90 ,  H04W76/30 ,  H04W76/50

摘要： A cellular phone having a telephone communication unit and a data communication unit is provided with the function of notifying a user of emergency data communication immediately even when the emergency data communication was received while a call was in progress. There is provided a communication terminal equipment according to the present invention, which includes a data communication unit which receives emergency data communication, a display unit which displays the contents of the received data communication thereon, and a communication unit which communicates with a base station by phone or the like. The communication unit establishes a call link through a cellular phone network, and the data communication unit allows received data to interrupt a call upon emergency, displays it on the display unit and notifies a user that emergency data has been received.

摘要翻译： 具有电话通信单元和数据通信单元的蜂窝电话具有即使当呼叫进行时接收到紧急数据通信时也立即通知用户紧急数据通信的功能。 提供了根据本发明的通信终端设备，其包括接收紧急数据通信的数据通信单元，显示接收到的数据通信的内容的显示单元，以及通信单元，其与基站通信 电话等。 通信单元通过蜂窝电话网络建立呼叫链接，并且数据通信单元允许接收的数据在紧急情况下中断呼叫，将其显示在显示单元上并通知用户已经接收到紧急数据。

公开(公告)号：US07565120B2

公开(公告)日：2009-07-21

申请号：US11585996

申请日：2006-10-25

申请人： Yutaka Igarashi ,  Yusaku Katsube ,  Akio Yamamoto

发明人： Yutaka Igarashi ,  Yusaku Katsube ,  Akio Yamamoto

IPC分类号： H04B1/06

CPC分类号： H04B1/30

摘要： In a signal receiving circuit of a direct conversion system applied with a semiconductor integrated circuit for radio communication having a PLL requiring a clock signal, an LNA requiring low-noise receiving characteristics, and others, a variable coupling line is provided between clock signal buffers and at an input stage of the PLL, so that coupling between the variable coupling line and an input terminal of the LNA and coupling between the variable coupling line and a GND terminal of the LNA are made equal to each other at frequencies of higher harmonic waves of a clock signal. When the input terminal and the GND terminal of the LNA are excited at the same phase, since no output occurs at an output terminal of the LNA, an output of the LNA does not contain any higher harmonic wave of a clock signal.

摘要翻译： 在应用于具有需要时钟信号的PLL的无线电通信用半导体集成电路的直接转换系统的信号接收电路中，需要低噪声接收特性的LNA等，在时钟信号缓冲器和 在PLL的输入级，使得可变耦合线与LNA的输入端之间的耦合以及可变耦合线与LNA的GND端之间的耦合使得在高次谐波的频率处彼此相等 一个时钟信号。 当LNA的输入端子和GND端子在相同相位被激励时，由于在LNA的输出端子处没有输出，所以LNA的输出不包含时钟信号的任何高次谐波。

公开(公告)号：US20090023411A1

公开(公告)日：2009-01-22

申请号：US11718101

申请日：2005-02-23

申请人： Yusaku Katsube ,  Akio Yamamoto

发明人： Yusaku Katsube ,  Akio Yamamoto

IPC分类号： H04B1/06 ,  H04B1/16

CPC分类号： H04B1/1018

摘要： The present invention is a receiving circuit used for a cellular phone that is reduced in size and can realize low power consumption. In a signal reception circuit that is used in a cellular phone that perform transmission and reception of a plurality of band wireless signals and includes a low-pass filter for removing blockers unnecessary for signal reception, the low-pass filter 104 is composed of a plurality of filters composed of a plurality of different circuit configurations and having a plurality of different pole positions, switching between a filter for blocker removal and a filter configuration with reduced sensitivity degradation is performed by combining a plurality of filters for each signal reception band, and by performing power-off of an unnecessary filter portion in the filter configuration, power consumption is reduced. By constituting a plurality of different filters using filters mutually complementing their characteristics, a redundant filter configuration can be avoided, so that the area thereof can be suppressed to necessity minimum, and cost can be reduced.

摘要翻译： 本发明是用于移动电话的接收电路，其尺寸减小并且可以实现低功耗。 在用于执行多个频带无线信号的发送和接收的蜂窝电话中使用的信号接收电路，并且包括用于去除不需要信号接收的阻塞器的低通滤波器，低通滤波器104由多个 由多个不同的电路结构构成并且具有多个不同的极位置的滤波器，通过组合用于每个信号接收频带的多个滤波器，并且通过 在滤波器结构中执行不需要的滤波器部分的断电，功耗降低。 通过使用与其特性相互补充的滤波器构成多个不同的滤波器，可以避免冗余滤波器构造，从而可以将其面积抑制到必要最小，并且可以降低成本。

公开(公告)号：US20080003976A1

公开(公告)日：2008-01-03

申请号：US11897432

申请日：2007-08-29

申请人： Yusaku Katsube ,  Koichi Terui

发明人： Yusaku Katsube ,  Koichi Terui

IPC分类号： H04M11/04

CPC分类号： H04W4/90 ,  H04W4/20 ,  H04W76/30 ,  H04W76/50

摘要： A cellular phone having a telephone communication unit and a data communication unit is provided with the function of notifying a user of emergency data communication immediately even when the emergency data communication was received while a call was in progress. There is provided a communication terminal equipment according to the present invention, which includes a data communication unit which receives emergency data communication, a display unit which displays the contents of the received data communication thereon, and a communication unit which communicates with a base station by phone or the like. The communication unit establishes a call link through a cellular phone network, and the data communication unit allows received data to interrupt a call upon emergency, displays it on the display unit and notifies a user that emergency data has been received.

摘要翻译： 具有电话通信单元和数据通信单元的蜂窝电话具有即使当呼叫进行时接收到紧急数据通信时也立即通知用户紧急数据通信的功能。 提供了根据本发明的通信终端设备，其包括接收紧急数据通信的数据通信单元，显示接收到的数据通信的内容的显示单元，以及通信单元，其与基站通信 电话等。 通信单元通过蜂窝电话网络建立呼叫链接，并且数据通信单元允许接收的数据在紧急情况下中断呼叫，将其显示在显示单元上并通知用户已经接收到紧急数据。