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    • 2. 发明授权
    • Weighted average servo burst peak detector for disk drive read
    • 用于磁盘驱动器读取的加权平均伺服脉冲串峰值检测器
    • US5362993A
    • 1994-11-08
    • US119748
    • 1993-09-10
    • Laurent Aubry
    • Laurent Aubry
    • H03K5/08G11C27/02H03K5/159
    • H03K5/084
    • A peak detector samples and holds amplitudes of pulses of a servo burst and includes a master peak detector for following a portion of a rising edge of each pulse until a peak amplitude is reached, and for decaying rapidly at a falling edge of each burst following the peak until a rising edge of a subsequent burst is intercepted at a point of interception, and for generating a control window extending from the point of interception of a rising edge to a peak value of each subsequent pulse; a slave peak detector enabled by the control window of the master detector for following the portion of the rising edge of each burst from the point of interception to the peak value, and for holding the peak value reached by the master detector during the control window, a holding circuit responsive to the slave detector and having a first, rapid time constant for rapidly acquiring a peak value of at least one initial peak of the burst, and having a second, slower time constant for adjusting the initially acquired peak value in light of subsequent peak values of the burst; and, a switching circuit for automatically switching the holding circuit from the first time constant to the second time constant.
    • 峰值检测器采样并保持伺服脉冲串的脉冲幅度,并且包括主峰值检测器,用于跟随每个脉冲的上升沿的一部分,直到达到峰值振幅,并且在随后的每个脉冲串的下降沿迅速衰减 直到下一个脉冲串的上升沿在截取点被截取,并且用于生成从截止上升沿的点延伸到每个后续脉冲的峰值的控制窗口; 由主检测器的控制窗使能的从峰值检测器,用于跟踪从截止点到峰值的每个脉冲串的上升沿的部分,并且在控制窗口期间保持主检测器达到的峰值, 保持电路响应从属检测器并具有第一快速时间常数,用于快速获取脉冲串的至少一个初始峰值的峰值,并具有第二较慢的时间常数,用于根据 突发的后续峰值; 以及用于将保持电路从第一时间常数自动切换到第二时间常数的开关电路。