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    • 21. 发明授权
    • Servo control device and optical disc device
    • 伺服控制装置和光盘装置
    • US08437231B2
    • 2013-05-07
    • US13533378
    • 2012-06-26
    • Nobuyoshi Kobayashi
    • Nobuyoshi Kobayashi
    • G11B7/00
    • G11B20/10037G11B7/0906G11B20/10222G11B2220/2537
    • A servo control device includes a plurality of reproduction channels, a plurality of analog/digital (A/D) converters, a servo error detecting circuit that generates a servo error signal, a servo signal processing device that executes predetermined processing for the servo error signal to generate a control signal, and a sampling frequency converter that converts the sampling frequency between the servo error detecting circuit and the servo signal processing device. A first clock is included as a sampling clock of the A/D converters and a processing clock of the servo error detecting circuit. A second clock is included as a processing clock of the servo signal processing device. The sampling frequency converter converts the sampling frequency by processing the servo error signal by the servo error detecting circuit in synchronization with the first clock and processing the signal processed in synchronization with the first clock in synchronization with the second clock.
    • 伺服控制装置包括多个再现通道,多个模拟/数字(A / D)转换器,产生伺服误差信号的伺服误差检测电路,对伺服误差信号执行预定处理的伺服信号处理装置 以产生控制信号;以及采样频率转换器,其转换伺服误差检测电路和伺服信号处理装置之间的采样频率。 作为A / D转换器的采样时钟和伺服误差检测电路的处理时钟,包括第一时钟。 作为伺服信号处理装置的处理时钟包括第二时钟。 采样频率转换器通过与第一时钟同步地由伺服误差检测电路处理伺服误差信号来转换采样频率,并与第二时钟同步地处理与第一时钟同步处理的信号。