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    • 4. 发明授权
    • Clock generator and data recovery circuit using the same
    • 时钟发生器和数据恢复电路使用相同
    • US07778375B2
    • 2010-08-17
    • US11246090
    • 2005-10-11
    • Chao-Hsin Lu
    • Chao-Hsin Lu
    • H03D3/24
    • H03L7/0996H03L7/087H03L7/0891H03L7/18H04L7/0338
    • A clock generator and a data recovery circuit. The clock generator includes a voltage control oscillator (VCO) for generating a sampling clock and multi-phase clocks, a multiplexer for receiving the multi-phase clocks and selecting one of the multi-phase clocks to generate a selected clock according to a selection signal, a phase-frequency detector for receiving the selected clock and a reference clock and generating a phase-frequency error signal, a charge pump and loop filter for receiving the phase-frequency error signal and generating a control voltage, a phase detector for receiving the sampling clock and an input signal and generating a phase error signal, and a digital low-pass filter for receiving the phase error signal and generating the selection signal. The digital low-pass filter clears an accumulated phase error when it generates the selection signal to force the multiplexer to change the phase.
    • 时钟发生器和数据恢复电路。 时钟发生器包括用于产生采样时钟和多相时钟的压控振荡器(VCO),多路复用器,用于接收多相时钟并根据选择信号选择多相时钟之一以产生所选择的时钟 用于接收所选择的时钟和参考时钟并产生相位频率误差信号的相位频率检测器,用于接收相位频率误差信号并产生控制电压的电荷泵和环路滤波器,相位检测器,用于接收 采样时钟和输入信号并产生相位误差信号,以及数字低通滤波器,用于接收相位误差信号并产生选择信号。 当数字低通滤波器产生选择信号以使多路复用器改变相位时,会清除累积的相位误差。
    • 5. 发明授权
    • Sampling-error phase compensating apparatus and method thereof
    • 采样误差相位补偿装置及其方法
    • US07453971B2
    • 2008-11-18
    • US11865874
    • 2007-10-02
    • Chao-Hsin Lu
    • Chao-Hsin Lu
    • H04L7/00
    • H03L7/093H03L7/0812H04L7/0331
    • A sampling-error phase compensating device and a method thereof for sequentially sampling data signals and outputting sampled data signals. The method sequentially includes: sampling each data signal according to a first sampling clock signal, and sequentially outputting corresponding phase detection signals according to the sampled data signals; sequentially outputting phase regulating signals, which correspond to the phase detection signals, respectively, according to the phase detection signals, wherein when the phase detection signals are the same, the phase regulating signals includes first-state phase regulating signals and second-state phase regulating signals, the first-state phase regulating signals correspond to the phase detection signals, and the number of the second-state phase regulating signals is smaller than that of the first-state phase regulating signals; and sequentially outputting second sampling clock signals according to the phase regulating signals, wherein phases of the sampling clock signals correspond to those of the phase regulating signals, respectively.
    • 一种采样误差相位补偿装置及其方法,用于顺序采样数据信号并输出​​采样数据信号。 该方法依次包括:根据第一采样时钟信号对每个数据信号进行采样,并根据采样的数据信号顺序地输出相应的相位检测信号; 根据相位检测信号分别顺序地输出与相位检测信号相对应的相位调制信号,其中当相位检测信号相同时,相位调节信号包括第一状态相位调节信号和第二状态相位调节 信号,第一状态相位调节信号对应于相位检测信号,并且第二状态相位调节信号的数量小于第一状态相位调制信号的数量; 并且根据相位调节信号依次输出第二采样时钟信号,其中采样时钟信号的相位分别对应于相位调制信号的相位。