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1. 发明授权

US5325346A Digital servo apparatus for optical disc player 失效
标题翻译：光盘播放器数字伺服装置
公开(公告)号：US5325346A
公开(公告)日：1994-06-28
申请号：US967274
申请日：1992-10-26
申请人： Kiyomasa Hasegawa , Takeshi Sasaki , Hidenobu Noda
发明人： Kiyomasa Hasegawa , Takeshi Sasaki , Hidenobu Noda
IPC分类号： G11B7/085 , G11B21/08 , G11B7/00
CPC分类号： G11B7/08541
摘要： A track traverse detecting circuit for generating a count-out signal with precision in addressing high-speed traverse operations appropriately. The circuit includes a tracking zero cross (TZC) signal generating circuit, two delay circuits, an edge detecting circuit and a mirror signal generating circuit. The TZC signal generating circuit generates a TZC signal at the zero cross timing of a tracking error signal. The TZC signal is then delayed by one of the two delay circuits by an appropriate time in accordance with the traverse speed for access to a desired track. Edges of the delayed TZC signal are detected by the edge detecting circuit. A mirror signal output by the mirror signal generating circuit is sampled at the timing of the detected TZC signal edges. The output of the sampling is provided accurately as the count-out signal.
摘要翻译：一种轨道横移检测电路，用于适当地产生寻址高速横移操作的精度的计数输出信号。电路包括跟踪零交叉（TZC）信号发生电路，两个延迟电路，边缘检测电路和镜像信号发生电路。 TZC信号发生电路在跟踪误差信号的零交叉定时产生TZC信号。然后根据用于访问所需轨道的横越速度，将两个延迟电路之一延迟TZC信号适当的时间。延迟TZC信号的边缘由边缘检测电路检测。在检测到的TZC信号边缘的定时对镜面信号发生电路输出的镜像信号进行采样。准确地提供采样的输出作为计数输出信号。

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