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    • 64. 发明授权
    • Recording method and apparatus using write pulse waveforms
    • 使用写入脉冲波形的记录方法和装置
    • US07551536B2
    • 2009-06-23
    • US12180681
    • 2008-07-28
    • Atsushi NakamuraShigeru Furumiya
    • Atsushi NakamuraShigeru Furumiya
    • G11B7/0045
    • G11B7/0062
    • A data recording method according to the present invention is a method for recording data as edge position information, including marks and spaces of multiple different lengths, on a storage medium by irradiating the storage medium with a pulsed energy beam. The method includes the steps of: (A) generating a write code sequence based on the data to be recorded; (B) determining a write pulse waveform, defining the power modulation of the energy beam, according to the code lengths of respective codes included in the write code sequence; and (C) modulating the power of the energy beam based on the write pulse waveform. If the shortest code length of the write code sequence is n (which is an integer equal to or greater than one), a write pulse waveform that has only one write pulse is assigned to recording mark making periods corresponding to codes with code lengths x of n, n+1 and n+2, and a write pulse waveform that has multiple write pulses Pw is assigned to recording mark making periods corresponding to codes with code lengths x of n+3 or more.
    • 根据本发明的数据记录方法是通过用脉冲能量束照射存储介质,将数据作为边缘位置信息(包括多个不同长度的标记和间隔)记录在存储介质上的方法。 该方法包括以下步骤:(A)基于要记录的数据生成写代码序列; (B)根据包含在写代码序列中的各个代码的码长,确定写入脉冲波形,定义能量束的功率调制; 和(C)基于写入脉冲波形调制能量束的功率。 如果写代码序列的最短代码长度为n(其为等于或大于1的整数),则仅具有一个写脉冲的写脉冲波形被分配给与代码长度为x的代码相对应的记录标记制作周期 n,n + 1和n + 2,并且具有多个写入脉冲Pw的写入脉冲波形被分配给与代码长度为x + 3或更大的代码相对应的记录标记制作周期。
    • 65. 发明授权
    • Comparator feedback peak detector
    • 比较器反馈峰值检测器
    • US07535263B2
    • 2009-05-19
    • US11543672
    • 2006-10-05
    • Atsushi Nakamura
    • Atsushi Nakamura
    • G01R19/00
    • G01R19/04
    • There is disclosed a circuit and a process for detecting peak-to-peak voltage. The circuit comprises a first comparator having an output coupled to a first capacitor, a non-inverting input for receiving a high frequency AC waveform, and an inverting input, a second comparator having an output coupled to a second capacitor, and a first second input, an operational amplifier having a non-inverting input coupled to the inverting input of the first comparator, and an inverting input coupled to the first input. The process comprises charging a first capacitor when a high frequency AC waveform voltage is greater than a buffered voltage of the first capacitor, charging a second capacitor when an inverted buffered voltage of the second capacitor is greater than the high frequency AC waveform voltage, and outputting a voltage based on the buffered voltage of the first capacitor and the inverted buffered voltage of the second capacitor.
    • 公开了用于检测峰 - 峰电压的电路和处理。 该电路包括第一比较器,其具有耦合到第一电容器的输出端,用于接收高频AC波形的非反相输入端和反相输入端,具有耦合到第二电容器的输出的第二比较器和第一第二输入端 ,具有耦合到第一比较器的反相输入的非反相输入的运算放大器和耦合到第一输入的反相输入。 该过程包括当高频AC波形电压大于第一电容器的缓冲电压时对第一电容器充电,当第二电容器的反相缓冲电压大于高频AC波形电压时,对第二电容器充电,并且输出 基于第一电容器的缓冲电压和第二电容器的反相缓冲电压的电压。