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    • 2. 发明授权
    • Frequency synthesizer and multi-band radio apparatus using said frequency synthesizer
    • 频率合成器和使用所述频率合成器的多频带无线电设备
    • US07715802B2
    • 2010-05-11
    • US11252781
    • 2005-10-19
    • Hiroshi YoshidaToshiyuki Umeda
    • Hiroshi YoshidaToshiyuki Umeda
    • H04B1/40
    • H04B1/405H03B21/02
    • There is disclosed a frequency synthesizer having an HF synthesizer for generating a first reference frequency signal having a variable frequency in a high-frequency band as a unit synthesizer, an LF synthesizer for generating a second reference frequency signal in a low-frequency band as another unit synthesizer, and an arithmetic circuit including a mixer for receiving the first and second reference frequency signals, a divider for receiving the second reference frequency signal, a mixer for receiving the first reference frequency signal and an output signal from the divider, a divider for receiving an output signal from the mixer, a divider for receiving an output signal from the mixer and capable of switching a division ratio, and a switch for switching and outputting output signals from the dividers, wherein an output signal of the switch is outputted as a first local signal, and an output signal from the divider is outputted as a second local signal.
    • 公开了一种具有HF合成器的频率合成器,用于产生在高频带中具有可变频率的第一参考频率信号作为单位合成器,LF合成器,用于产生低频带中的第二参考频率信号作为另一个 单元合成器和包括用于接收第一和第二参考频率信号的混合器的运算电路,用于接收第二参考频率信号的分频器,用于接收第一参考频率信号的混频器和来自分频器的输出信号, 从混合器接收输出信号,用于从混合器接收输出信号并能够切换分频比的分频器,以及用于切换和输出来自分频器的输出信号的开关,其中开关的输出信号作为 第一本地信号,并且来自分频器的输出信号作为第二本地信号被输出。
    • 9. 发明授权
    • Transmission system, transmission device, and clock synchronization method
    • 传输系统,传输设备和时钟同步方法
    • US08867681B2
    • 2014-10-21
    • US13248215
    • 2011-09-29
    • Hiroshi Yoshida
    • Hiroshi Yoshida
    • H04L7/00G06F1/12H04J3/06
    • G06F1/12H04J3/0685
    • A transmission system which couples a plurality of transmission devices to a control device includes a first transmission device which is one of the plurality of transmission devices; a first calculation circuit which calculates a first difference value indicating a frequency difference value between a common clock supplied from the control device and a first clock as a clock used in the first transmission device; and a transmitter which reports the first difference value to a second transmission device other than the first transmission device, wherein the second transmission device comprises: a second calculation circuit which calculates a second difference value indicating a frequency difference value between the common clock and a second clock used in the second transmission device, and a frequency controller which controls an oscillator generating the second clock so that the second difference value approaches the first difference value reported from the first transmission device.
    • 将多个传输设备耦合到控制设备的传输系统包括作为多个传输设备之一的第一传输设备; 第一计算电路,其计算指示从所述控制装置提供的公共时钟与所述第一时钟之间的频率差值作为所述第一发送装置中使用的时钟的第一差值; 以及向所述第一发送装置以外的第二发送装置报告所述第一差分值的发送机,其中,所述第二发送装置包括:第二计算电路,其计算表示所述公共时钟与第二发送装置之间的频率差值的第二差分值 在第二发送装置中使用的时钟,以及频率控制器,其控制产生第二时钟的振荡器,使得第二差值接近从第一发送装置报告的第一差值。