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73 条记录 (耗时 0.02 秒)

    Low-power analog-to-digital converter
    71.
    发明授权
    Low-power analog-to-digital converter 失效
    低功耗模数转换器

    公开(公告)号：US06480133B2

    公开(公告)日：2002-11-12

    申请号：US09766257

    申请日：2001-01-19

    申请人： Haruo Kobayashi ,  Yasuyuki Kimura

    发明人： Haruo Kobayashi ,  Yasuyuki Kimura

    IPC分类号： H03M112

    CPC分类号： H03M1/204 ,  H03M1/141

    摘要： An A/D converter having folding circuits for being supplied with analog signal pairs and reference voltage pairs and for outputting folded differential current pairs; first comparators for comparing the differential current pairs supplied from the folding circuits and for outputting higher 3 bits of a Gray code; sine wave generators for outputting 4-phase sine wave pairs; a current interpolation circuit for interpolating the 4-phase sine wave pairs and outputting 32 sine wave pairs; second comparators for comparing the sine wave pairs with each other respectively: and a Gray code encoder for encoding the outputs of the second comparators into lower 5 bits of the Gray code. Thus, the A/D converter can be made high in speed, lower in operating voltage, finer in density and higher in integration.

    摘要翻译： 一种A / D转换器，具有用于提供模拟信号对和参考电压对并用于输出折叠的差分电流对的折叠电路; 用于比较从折叠电路提供的差分电流对和用于输出格雷码的较高3位的第一比较器; 用于输出4相正弦波对的正弦波发生器; 用于内插4相正弦波对并输出32个正弦波对的当前内插电路; 用于将正弦波对彼此进行比较的第二比较器和用于将第二比较器的输出编码为格雷码的低5位的格雷码编码器。 因此，可以使A / D转换器的速度高，工作电压更低，密度更细，集成度更高。

    Data recording method and device for optical memory card capable of stopping recording upon detection of synchronization error
    72.
    发明授权
    Data recording method and device for optical memory card capable of stopping recording upon detection of synchronization error 失效
    用于光存储卡的数据记录方法和装置，能够在检测到同步误差时停止记录

    公开(公告)号：US06282159B1

    公开(公告)日：2001-08-28

    申请号：US09101747

    申请日：1998-07-10

    申请人： Yasuyuki Kimura

    发明人： Yasuyuki Kimura

    IPC分类号： G11B509

    CPC分类号： G11B20/18 ,  G06K1/126 ,  G11B19/04 ,  G11B20/1215 ,  G11B27/10 ,  G11B27/30 ,  G11B27/36 ,  G11B2020/1476

    摘要： A data recording method and device for an optical memory card which is adapted to prevent a recording error due to step-out during a data recording operation, and minimize a decrease in the recording capacity of an optical memory card. While data are recorded, an output from an SYNC mark detection circuit (2) and an output from an internal synchronization signal generation circuit (3) are compared with each other in a comparator circuit (4). When step-out occurs, a write signal generation circuit (5) is stopped and the data recording operation is interrupted, and a re-recording operation is started at a frame adjacent to the frame in which a recording error occurred, on the basis of the value in a write cycle counter, whereby a decrease in the recording capacity of the optical memory card is minimized.

    摘要翻译： 一种用于光存储卡的数据记录方法和装置，其适于在数据记录操作期间防止由于失步引起的记录错误，并且使光存储卡的记录容量减小最小化。 在记录数据的同时，在比较器电路（4）中比较来自SYNC标记检测电路（2）的输出和内部同步信号发生电路（3）的输出。 当发生超出时，写入信号生成电路（5）停止，并且数据记录操作被中断，并且基于在发生记录错误的帧的相邻帧处开始重新记录操作 写周期计数器中的值，从而最小化光存储卡的记录容量的降低。