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1. 发明申请

US20020000926A1 Data reproduction device with simplified circuit structure 失效
标题翻译：具有简化电路结构的数据再现装置
公开(公告)号：US20020000926A1
公开(公告)日：2002-01-03
申请号：US09774100
申请日：2001-01-31
申请人： Fujitsu Limited, Kawasaki, Japan
发明人： Akira Nanba , Kenichi Hamada , Masakazu Taguchi
IPC分类号： H03M001/12
CPC分类号： G11B20/1403 , G11B20/10009
摘要： A data reproduction device includes an A/D converter quantizing a reproduction signal read from data recorded on a recording medium to produce quantized data based on a sampling clock; a reproduction signal determination unit determining rising and falling parts of the reproduction signal based on the quantized data, and outputting a gate signal corresponding to a result of determining the rising and falling parts; a leading-edge clock generation unit generating a leading-edge clock signal synchronous to a leading edge indicating a rising part of the reproduction signal; a trailingedge clock generation unit generating a trailingedge clock signal synchronous to a trailing edge indicating a falling part of the reproduction signal; a signal switch unit generating the sampling clock by selecting one of the leading-edge clock signal and the trailing-edge clock signal based on a value of the gate signal; and a signal supply unit supplying the sampling clock to the A/D converter, wherein the data reproduction device reproduces the data recorded on the recording medium by executing digital signal processing on the quantized data. The data reproduction device can share a single A/D converter and a single decoder used for reproducing recorded data based on clocks synchronous to a leading edge and a trailing edge of the recording pit. As a result, a circuit structure of the data reproduction device is simplified, thereby achieving decreases in a size of an implementation area and in the number of implemented parts in the circuit structure of the data reproduction device.
摘要翻译：数据再现装置包括：量化从记录在记录介质上的数据读取的再现信号的A / D转换器，以产生基于采样时钟的量化数据; 再现信号确定单元，基于量化数据确定再现信号的上升和下降部分，并输出与确定上升和下降部分的结果相对应的门信号; 前沿时钟产生单元，产生与指示再现信号的上升部分的前沿同步的前沿时钟信号; 后沿时钟生成单元，产生与指示再现信号的下降部分的后沿同步的后沿时钟信号; 信号切换单元，基于所述门信号的值，选择所述前沿时钟信号和所述后沿时钟信号之一，生成所述采样时钟; 以及将采样时钟提供给A / D转换器的信号供给单元，其中数据再现装置通过对量化数据执行数字信号处理来再现记录在记录介质上的数据。数据再现装置可以基于与记录凹坑的前沿和后沿同步的时钟来共享单个A / D转换器和用于再现记录数据的单个解码器。结果，简化了数据再现装置的电路结构，从而实现了数据再现装置的电路结构中的实现区域的大小和实现部分的数量的减少。

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