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    Wireless communication receiver
    1.
    发明申请
    Wireless communication receiver 审中-公开
    无线通信接收机

    公开(公告)号：US20060128334A1

    公开(公告)日：2006-06-15

    申请号：US11170086

    申请日：2005-06-30

    申请人： Isao Ikuta ,  Akio Yamamoto ,  Yutaka Igarashi ,  Stephen Goodwin

    发明人： Isao Ikuta ,  Akio Yamamoto ,  Yutaka Igarashi ,  Stephen Goodwin

    IPC分类号： H04B1/06 ,  H04B7/00

    CPC分类号： H03G3/3052 ,  H03G1/0088

    摘要： To reduce circuit area and power consumption and suppress transient response occurring at switching in PGA of a programmable gain amplifier is provided a wireless communication receiver comprising PGAs for adjusting the gain of a received signal down-converted by mixers and sending it to base-band block. Within PGAs are provided HPFATT circuits formed of capacitors arranged in series, and ladder resistors arranged in parallel, with signal lines, and a plurality of switches. HPFATT is a circuit serving as a high-pass filter and an attenuator for gain switching, wherein switches are controlled by control signal sg from a controller. Amplifiers connected to the rear stage of the HPFATT circuit are formed of MOS transistors.

    摘要翻译： 为了减少电路面积和功率消耗并抑制在可编程增益放大器的PGA中切换时发生的瞬态响应，提供了一种包括用于调节被混频器下变频的接收信号的增益的PGA的无线通信接收机，并将其发送到基带块 。 在PGA中提供由串联布置的电容器构成的HPFATT电路和与信号线并联布置的梯形电阻器以及多个开关。 HPFATT是用作高通滤波​​器和用于增益切换的衰减器的电路，其中开关由来自控制器的控制信号sg控制。 连接到HPFATT电路的后级的放大器由MOS晶体管形成。

    Receiving system and semiconductor integrated circuit device for processing wireless communication signal
    2.
    发明授权
    Receiving system and semiconductor integrated circuit device for processing wireless communication signal 有权
    接收系统和半导体集成电路设备，用于处理无线通信信号

    公开(公告)号：US07340232B2

    公开(公告)日：2008-03-04

    申请号：US10842445

    申请日：2004-05-11

    申请人： Motoki Murakami ,  Yutaka Igarashi ,  Akio Yamamoto ,  Isao Ikuta ,  Yoshiaki Harasawa

    发明人： Motoki Murakami ,  Yutaka Igarashi ,  Akio Yamamoto ,  Isao Ikuta ,  Yoshiaki Harasawa

    IPC分类号： H04B1/16

    CPC分类号： H04B1/30

    摘要： The invention provides a receiving system and a transmitting system capable of decreasing an offset between differential signals and between quadrature signals and improving a manufacturing yield and a semiconductor integrated circuit device for processing a wireless communication signal having therein the systems. A receiving system includes: a local oscillator for generating an oscillation signal in a desired frequency; a 90-degree phase-shifting circuit for generating a signal by shifting a phase of the oscillation signal output from the local oscillator by 90 degrees; a first mixer for mixing one of differential reception signals with an output signal of the first 90-degree phase-shifting circuit and outputting frequency-converted differential signals; and a second mixer for mixing another one of the differential reception signals with an output signal of the local oscillator and outputting frequency-converted differential signals.

    摘要翻译： 本发明提供一种能够减少差分信号与正交信号之间的偏移并提高制造成品率的接收系统和发送系统，以及用于处理其中具有系统的无线通信信号的半导体集成电路装置。 接收系统包括：本地振荡器，用于产生期望频率的振荡信号; 用于通过将从本地振荡器输出的振荡信号的相位相移90度来产生信号的90度相移电路; 第一混频器，用于将差分接收信号中的一个与第一90度移相电路的输出信号混频并输出经频率转换的差分信号; 以及第二混频器，用于将另一个差分接收信号与本地振荡器的输出信号混频并输出经变频的差分信号。

    Quadrature mixer circuits and mobile terminal using the same
    3.
    发明授权
    Quadrature mixer circuits and mobile terminal using the same 失效
    正交混频器电路和移动终端使用相同

    公开(公告)号：US07418250B2

    公开(公告)日：2008-08-26

    申请号：US11704356

    申请日：2007-02-09

    申请人： Yutaka Igarashi ,  Isao Ikuta ,  Akio Yamamoto

    发明人： Yutaka Igarashi ,  Isao Ikuta ,  Akio Yamamoto

    IPC分类号： H04B1/26 ,  H04B1/28 ,  H03D3/00 ,  H02M11/00

    CPC分类号： H03D7/165 ,  H03D2200/0019

    摘要： Because there are different voltages at two current output terminals of a current divider, the voltages at the current input terminals of two current switch circuits are not affected mutually even with a large amplitude of local signals. Accordingly, the performance of a quadrature mixer can be enhanced by increasing the amplitude of the local signals. Bias currents are supplied to the two current switch circuits through the current divider from a common DC current source which essentially supplies a bias current to a V/I converter and, therefore, power consumption is reduced.

    摘要翻译： 由于在分压器的两个电流输出端子处存在不同的电压，所以即使在大幅度的本地信号的情况下，两个电流开关电路的电流输入端子处的电压也不会相互影响。 因此，可以通过增加本地信号的振幅来增强正交混频器的性能。 通过来自公共DC电流源的分流器将偏置电流提供给两个电流开关电路，其基本上向V / I转换器提供偏置电流，因此降低功耗。

    Quadrature mixer circuits and mobile terminal using the same
    4.
    发明申请
    Quadrature mixer circuits and mobile terminal using the same 失效

    公开(公告)号：US20070135074A1

    公开(公告)日：2007-06-14

    申请号：US11704356

    申请日：2007-02-09

    申请人： Yutaka Igarashi ,  Isao Ikuta ,  Akio Yamamoto

    发明人： Yutaka Igarashi ,  Isao Ikuta ,  Akio Yamamoto

    IPC分类号： H04B1/26 ,  H04B15/00

    CPC分类号： H03D7/165 ,  H03D2200/0019

    摘要： Because there are different voltages at two current output terminals of a current divider, the voltages at the current input terminals of two current switch circuits are not affected mutually even with a large amplitude of local signals. Accordingly, the performance of a quadrature mixer can be enhanced by increasing the amplitude of the local signals. Bias currents are supplied to the two current switch circuits through the current divider from a common DC current source which essentially supplies a bias current to a V/I converter and, therefore, power consumption is reduced.

    Quadrature mixer circuits and mobile terminal using the same
    5.
    发明授权
    Quadrature mixer circuits and mobile terminal using the same 失效
    正交混频器电路和移动终端使用相同

    公开(公告)号：US07184739B2

    公开(公告)日：2007-02-27

    申请号：US10706278

    申请日：2003-11-13

    申请人： Yutaka Igarashi ,  Isao Ikuta ,  Akio Yamamoto

    发明人： Yutaka Igarashi ,  Isao Ikuta ,  Akio Yamamoto

    IPC分类号： H04B1/26 ,  H04B1/28 ,  H03D3/00 ,  H02M11/00

    CPC分类号： H03D7/165 ,  H03D2200/0019

    摘要： Because there are different voltages at two current output terminals of a current divider, the voltages at the current input terminals of two current switch circuits are not affected mutually even with a large amplitude of local signals. Accordingly, the performance of a quadrature mixer can be enhanced by increasing the amplitude of the local signals. Bias currents are supplied to the two current switch circuits through the current divider from a common DC current source which essentially supplies a bias current to a V/I converter and, therefore, power consumption is reduced.

    摘要翻译： 由于在分压器的两个电流输出端子处存在不同的电压，所以即使在大幅度的本地信号的情况下，两个电流开关电路的电流输入端子处的电压也不会相互影响。 因此，可以通过增加本地信号的振幅来增强正交混频器的性能。 通过来自公共DC电流源的分流器将偏置电流提供给两个电流开关电路，其基本上向V / I转换器提供偏置电流，因此降低功耗。

    Receiving system and semiconductor integrated circuit device for processing wireless communication signal
    6.
    发明申请
    Receiving system and semiconductor integrated circuit device for processing wireless communication signal 有权
    接收系统和半导体集成电路设备，用于处理无线通信信号

    公开(公告)号：US20050118976A1

    公开(公告)日：2005-06-02

    申请号：US10842445

    申请日：2004-05-11

    申请人： Motoki Murakami ,  Yutaka Igarashi ,  Akio Yamamoto ,  Isao Ikuta ,  Yoshiaki Harasawa

    发明人： Motoki Murakami ,  Yutaka Igarashi ,  Akio Yamamoto ,  Isao Ikuta ,  Yoshiaki Harasawa

    IPC分类号： H04B1/30 ,  H04B1/16 ,  H03H11/16 ,  H03K3/00 ,  H03K5/13

    CPC分类号： H04B1/30

    摘要： The invention provides a receiving system and a transmitting system capable of decreasing an offset between differential signals and between quadrature signals and improving a manufacturing yield and a semiconductor integrated circuit device for processing a wireless communication signal having therein the systems. A receiving system includes: a local oscillator for generating an oscillation signal in a desired frequency; a 90-degree phase-shifting circuit for generating a signal by shifting a phase of the oscillation signal output from the local oscillator by 90 degrees; a first mixer for mixing one of differential reception signals with an output signal of the first 90-degree phase-shifting circuit and outputting frequency-converted differential signals; and a second mixer for mixing another one of the differential reception signals with an output signal of the local oscillator and outputting frequency-converted differential signals.

    摘要翻译： 本发明提供一种能够减少差分信号与正交信号之间的偏移并提高制造成品率的接收系统和发送系统，以及用于处理其中具有系统的无线通信信号的半导体集成电路装置。 接收系统包括：本地振荡器，用于产生期望频率的振荡信号; 用于通过将从本地振荡器输出的振荡信号的相位相移90度来产生信号的90度相移电路; 第一混频器，用于将差分接收信号中的一个与第一90度移相电路的输出信号混频并输出经频率转换的差分信号; 以及第二混频器，用于将另一个差分接收信号与本地振荡器的输出信号混频并输出经变频的差分信号。

    High frequency signal receiver and semiconductor integrated circuit
    7.
    发明申请
    High frequency signal receiver and semiconductor integrated circuit 审中-公开
    高频信号接收机和半导体集成电路

    公开(公告)号：US20050147192A1

    公开(公告)日：2005-07-07

    申请号：US10985948

    申请日：2004-11-12

    申请人： Akio Yamamoto ,  Yutaka Igarashi ,  Isao Ikuta

    发明人： Akio Yamamoto ,  Yutaka Igarashi ,  Isao Ikuta

    IPC分类号： H04L27/38 ,  H03G3/30 ,  H04B1/10 ,  H04B1/16 ,  H04L27/08 ,  H04L27/22

    CPC分类号： H04B1/1036 ,  H03G3/3052

    摘要： A high frequency signal receiver comprising a variable gain amplifier, a first filter for restricting a bandwidth of an analog baseband signal, an AD converter connected to the first filter, a second filter for restricting the bandwidth of an output of the AD converter, an interference wave detection circuit for detecting the level of an interference wave in the received signal, and a controller for controlling the first filter to have a wide bandwidth when the level of the interference wave is lower than a threshold level, and switching the first filter to have a narrow bandwidth while changing the characteristics of the second filter so as to compensate deterioration of the pass-band of the first filter when the level of the interference wave is equal to or greater than the threshold level.

    摘要翻译： 一种高频信号接收机，包括可变增益放大器，用于限制模拟基带信号的带宽的第一滤波器，连接到第一滤波器的AD转换器，用于限制AD转换器的输出的带宽的第二滤波器， 波检测电路，用于检测接收信号中的干扰波的电平;以及控制器，用于当干扰波的电平低于阈值电平时控制第一滤波器具有宽带宽，并且将第一滤波器切换成具有 窄带宽，同时改变第二滤波器的特性，以便当干扰波的电平等于或大于阈值电平时补偿第一滤波器的通带的劣化。

    Voltage-controlled oscillator and RF-IC
    8.
    发明申请
    Voltage-controlled oscillator and RF-IC 审中-公开
    压控振荡器和RF-IC

    公开(公告)号：US20060181362A1

    公开(公告)日：2006-08-17

    申请号：US11280819

    申请日：2005-11-17

    申请人： Isao Ikuta ,  Akio Yamamoto ,  Yusaku Katsube ,  Toshiya Uozumi ,  Yasuyuki Kimura

    发明人： Isao Ikuta ,  Akio Yamamoto ,  Yusaku Katsube ,  Toshiya Uozumi ,  Yasuyuki Kimura

    IPC分类号： H03B5/08

    CPC分类号： H03B5/1841 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1253

    摘要： There are provided a voltage-controlled oscillator and an RF-IC for W-CDMA, which are capable of ensuring a wide frequency range and improving oscillation stability. The voltage-controlled oscillator (RF-IC) includes: switching A and B inductors generating a magnetic interaction between resonant A and B inductors of a resonant circuit; and an A_NMOS, a B_NMOS, a C_NMOS, and D_NMOS as switch/load means having together a function of changing an inductance value by the magnetic interaction between the resonant A and B inductors and the switching A and B inductors and a function of serving as loads of the switching A and B inductors. The A_NMOS, the B_NMOS, the C_NMOS, and the D_NMOS are turned ON/OFF by a control signal so as to control the mutual induction, whereby the oscillation frequency is switched by changing the inductance value of the resonant circuit. Also, oscillation stability is improved by increasing the inductance value.

    摘要翻译： 提供了一种用于W-CDMA的压控振荡器和RF-IC，其能够确保较宽的频率范围并提高振荡稳定性。 压控振荡器（RF-IC）包括：开关A和B电感器，其在谐振电路的谐振A和B电感器之间产生磁相互作用; 以及作为开关/负载的A_NMOS，B_NMOS，C_NMOS和D_NMOS一起具有通过谐振A和B电感器与开关A和B电感器之间的磁相互作用改变电感值的功能，以及用作 开关A和B电感的负载。 通过控制信号使A_NMOS，B_NMOS，C_NMOS和D_NMOS变为ON / OFF，从而控制互感，从而通过改变谐振电路的电感值来切换振荡频率。 此外，通过增加电感值来提高振荡稳定性。