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43 条记录 (耗时 0.023 秒)

    Direct conversion receiver
    2.
    发明授权
    Direct conversion receiver 有权
    直接转换接收机

    公开(公告)号：US07260373B2

    公开(公告)日：2007-08-21

    申请号：US10727612

    申请日：2003-12-05

    申请人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    发明人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    IPC分类号： H04B1/10

    CPC分类号： H04B1/30 ,  H03G3/3052

    摘要： In a direct conversion receiver, to cancel a DC offset generated in the baseband processing block, negative feedback arrangements comprising a gain control amplifier and a low-pass filter are respectively attached to the I and Q signal branches of the baseband block following mixer outputs. The gain control amplifier in each negative feedback circuit is gain adjusted so that the product G-B of the gain G of a primary gain control amplifier and its own gain B will be constant and thereby the DC offset is cancelled. This DC offset cancellation can be applied in a continuous receiving system with no intermittent time during a receiving operation. Capacitance elements located off-chip can be reduced to those to be used only in the low-pass filters in the negative feedback circuits, whereas many off-chip capacitance elements have been required to be inserted between each stage of gain control amplifiers in conventional baseband chains.

    摘要翻译： 在直接转换接收机中，为了消除在基带处理块中产生的DC偏移，包括增益控制放大器和低通滤波器的负反馈装置分别附加到混频器输出之后的基带块的I和Q信号分支。 每个负反馈电路中的增益控制放大器被增益调整，使得主增益控制放大器的增益G的乘积G-B和其自身的增益B将恒定，从而DC偏移被消除。 该DC偏移消除可以应用于在接收操作期间没有间歇时间的连续接收系统中。 位于片外的电容元件可以减少到仅在负反馈电路中的低通滤波器中使用的电容元件，而许多芯片外电容元件需要插入到常规基带中的增益控制放大器的每个级之间 链条

    Direct conversion receiver
    5.
    发明申请
    Direct conversion receiver 有权
    直接转换接收机

    公开(公告)号：US20070190960A1

    公开(公告)日：2007-08-16

    申请号：US11725475

    申请日：2007-03-20

    申请人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    发明人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    IPC分类号： H04B1/26

    CPC分类号： H04B1/30 ,  H03G3/3052

    摘要： In a direct conversion receiver, to cancel a DC offset generated in the baseband processing block, negative feedback arrangements comprising a gain control amplifier and a low-pass filter are respectively attached to the I and Q signal branches of the baseband block following mixer outputs. The gain control amplifier in each negative feedback circuit is gain adjusted so that the product G·B of the gain G of a primary gain control amplifier and its own gain B will be constant and thereby the DC offset is cancelled. This DC offset cancellation can be applied in a continuous receiving system with no intermittent time during a receiving operation. Capacitance elements located off-chip can be reduced to those to be used only in the low-pass filters in the negative feedback circuits, whereas many off-chip capacitance elements have been required to be inserted between each stage of gain control amplifiers in conventional baseband chains.

    摘要翻译： 在直接转换接收机中，为了消除在基带处理块中产生的DC偏移，包括增益控制放大器和低通滤波器的负反馈装置分别附加到混频器输出之后的基带块的I和Q信号分支。 每个负反馈电路中的增益控制放大器被增益调整，使得主增益控制放大器的增益G的乘积G.B和其自身的增益B将恒定，从而DC偏移被消除。 该DC偏移消除可以应用于在接收操作期间没有间歇时间的连续接收系统中。 位于片外的电容元件可以减少到仅在负反馈电路中的低通滤波器中使用的电容元件，而许多芯片外电容元件需要插入到常规基带中的增益控制放大器的每个级之间 链条

    Direct conversion receiver
    6.
    发明授权
    Direct conversion receiver 有权
    直接转换接收机

    公开(公告)号：US07856218B2

    公开(公告)日：2010-12-21

    申请号：US11725475

    申请日：2007-03-20

    申请人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    发明人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    IPC分类号： H04B1/10

    CPC分类号： H04B1/30 ,  H03G3/3052

    摘要： In a direct conversion receiver, to cancel a DC offset generated in the baseband processing block, negative feedback arrangements comprising a gain control amplifier and a low-pass filter are respectively attached to the I and Q signal branches of the baseband block following mixer outputs. The gain control amplifier in each negative feedback circuit is gain adjusted so that the product G·B of the gain G of a primary gain control amplifier and its own gain B will be constant and thereby the DC offset is cancelled. This DC offset cancellation can be applied in a continuous receiving system with no intermittent time during a receiving operation. Capacitance elements located off-chip can be reduced to those to be used only in the low-pass filters in the negative feedback circuits, whereas many off-chip capacitance elements have been required to be inserted between each stage of gain control amplifiers in conventional baseband chains.

    摘要翻译： 在直接转换接收机中，为了消除在基带处理块中产生的DC偏移，包括增益控制放大器和低通滤波器的负反馈装置分别附加到混频器输出之后的基带块的I和Q信号分支。 每个负反馈电路中的增益控制放大器被增益调整，使得主增益控制放大器的增益G的乘积G·B和其自身的增益B将恒定，从而DC偏移被消除。 该DC偏移消除可以应用于在接收操作期间没有间歇时间的连续接收系统中。 位于片外的电容元件可以减少到仅在负反馈电路中的低通滤波器中使用的电容元件，而许多芯片外电容元件需要插入到常规基带中的增益控制放大器的每个级之间 链条

    Transmitter and semiconductor integrated circuit available for it
    7.
    发明授权
    Transmitter and semiconductor integrated circuit available for it 有权
    发射机和半导体集成电路可用

    公开(公告)号：US08442461B2

    公开(公告)日：2013-05-14

    申请号：US12854216

    申请日：2010-08-11

    申请人： Takayasu Norimatsu ,  Taizo Yamawaki ,  Yukinori Akamine ,  Koji Maeda

    发明人： Takayasu Norimatsu ,  Taizo Yamawaki ,  Yukinori Akamine ,  Koji Maeda

    IPC分类号： H03C1/62 ,  H04B17/00

    CPC分类号： H04B1/0483 ,  H03C5/00 ,  H04B2001/0491

    摘要： The transmitter synthesizes amplitude and phase components and calibrates a delay mismatch between amplitude and phase components with high accuracy at high speed. The transmitter has: a digital-to-analog converter (DAC) and a low-pass filter (LPF) in its amplitude-signal path; and a phase modulator operable to convert up a phase component into an RF component in its phase-signal path. In an operation of delay calibration, a test input signal is supplied to a delay-calibrating unit in the amplitude-signal path, and the delay-calibrating unit provides a test input signal to DAC. Then, LPF generates a test output signal. The delay-calibrating unit detects a delay of the test output signal relative to the test input signal, calibrates an amplitude signal delay in a range from the input of the delay-calibrating unit to the output of LPF, reduces the difference between amplitude and phase signal delays of the phase modulator in the phase-signal path.

    摘要翻译： 发射机合成幅度和相位分量，并以高精度高速校准振幅和相位分量之间的延迟失配。 发射机具有：幅度信号路径中的数模转换器（DAC）和低通滤波器（LPF）; 以及相位调制器，其可操作以将相位分量转换成其相位信号路径中的RF分量。 在延迟校准的操作中，将测试输入信号提供给幅度信号路径中的延迟校准单元，并且延迟校准单元向DAC提供测试输入信号。 然后，LPF产生测试输出信号。 延迟校准单元检测测试输出信号相对于测试输入信号的延迟，校准从延迟校准单元的输入到LPF的输出的范围内的幅度信号延迟，减小幅度和相位之间的差异 相位调制器在相位信号路径中的信号延迟。

    Transceiver
    8.
    发明授权
    Transceiver 有权
    收发器

    公开(公告)号：US08086188B2

    公开(公告)日：2011-12-27

    申请号：US12135190

    申请日：2008-06-08

    申请人： Satoshi Tanaka ,  Hiroshi Kamizuma ,  Koji Maeda ,  Sungwoo Cha ,  Yukinori Akamine ,  Taizo Yamawaki

    发明人： Satoshi Tanaka ,  Hiroshi Kamizuma ,  Koji Maeda ,  Sungwoo Cha ,  Yukinori Akamine ,  Taizo Yamawaki

    IPC分类号： H04B1/38

    CPC分类号： H04B1/28

    摘要： The transmitter of the transceiver includes: a transmitter-side mixers of a transmitter-side modulator; a transmitter-side voltage-controlled oscillator; and a transmitter-side divider. The divider having a dividing factor of a non-integral number is supplied with an oscillating output of the oscillator. A pair of non-quadrature local signals having a phase difference of 90° plus a predetermined offset angle is produced by the divider and supplied to the mixers. The transmitter includes a phase-shift unit which converts a pair of quadrature transmit signals having a phase difference of about 90° on an analog basis into a pair of non-quadrature shifted transmit signals. Consequently, quadrature modulation is performed by the mixers. Use of a similar configuration enables the reduction in interference of an RF signal with local signals supplied to receiver-side mixers of the receiver.

    摘要翻译： 收发器的发射机包括：发射机侧调制器的发射机侧混频器; 发射机侧压控振荡器; 和发射机侧分频器。 具有非积分数的分频因子的分频器被提供有振荡器的振荡输出。 具有90°相位差和预定偏移角的一对非正交本地信号由分频器产生并提供给混频器。 发射机包括相移单元，其将具有大约90°的相位差的一对正交发射信号在模拟上转换成一对非正交移位的发射信号。 因此，正交调制由混频器执行。 使用类似的配置使得能够减少RF信号与提供给接收机的接收机侧混频器的本地信号的干扰。

    TRANSCEIVER
    10.
    发明申请
    TRANSCEIVER 有权
    收发器

    公开(公告)号：US20080311860A1

    公开(公告)日：2008-12-18

    申请号：US12135190

    申请日：2008-06-08

    申请人： Satoshi Tanaka ,  Hiroshi Kamizuma ,  Koji Maeda ,  Sungwoo Cha ,  Yukinori Akamine ,  Taizo Yamawaki

    发明人： Satoshi Tanaka ,  Hiroshi Kamizuma ,  Koji Maeda ,  Sungwoo Cha ,  Yukinori Akamine ,  Taizo Yamawaki

    IPC分类号： H04B1/38

    CPC分类号： H04B1/28

    摘要： The transmitter of the transceiver includes: a transmitter-side mixers of a transmitter-side modulator; a transmitter-side voltage-controlled oscillator; and a transmitter-side divider. The divider having a dividing factor of a non-integral number is supplied with an oscillating output of the oscillator. A pair of non-quadrature local signals having a phase difference of 90° plus a predetermined offset angle is produced by the divider and supplied to the mixers. The transmitter includes a phase-shift unit which converts a pair of quadrature transmit signals having a phase difference of about 90° on an analog basis into a pair of non-quadrature shifted transmit signals. Consequently, quadrature modulation is performed by the mixers. Use of a similar configuration enables the reduction in interference of an RF signal with local signals supplied to receiver-side mixers of the receiver.

    摘要翻译： 收发器的发射机包括：发射机侧调制器的发射机侧混频器; 发射机侧压控振荡器; 和发射机侧分频器。 具有非积分数的分频因子的分频器被提供有振荡器的振荡输出。 具有90°相位差和预定偏移角的一对非正交本地信号由分频器产生并提供给混频器。 发射机包括相移单元，其将具有大约90°的相位差的一对正交发射信号在模拟上转换成一对非正交移位的发射信号。 因此，正交调制由混频器执行。 使用类似的配置使得能够减少RF信号与提供给接收机的接收机侧混频器的本地信号的干扰。