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    • 62. 发明授权
    • Storage apparatus and data verification method in storage apparatus
    • 存储装置中的存储装置和数据验证方法
    • US08250453B2
    • 2012-08-21
    • US12309138
    • 2008-12-22
    • Hiromi Matsushige
    • Hiromi Matsushige
    • G06F7/02
    • G06F11/0727G06F11/0757
    • When a data write request to a disk drive 210 is received from a host computer 20, a first error detecting code of write data to be written to the disk drive 210 in response to the data write request is generated and stored, write processing of the write data to the disk drive 210 is executed, whether or not response time as time required for the write processing exceeds a predetermined threshold value is determined, data stored in a sector as a writing destination of the write data is read from the sector when the response time exceeds the threshold value, a second error detecting code of the read data is generated, and when the first error detecting code and the second error detecting code are compared with each other and the two codes do not coincide with each other, a signal indicating that the write processing is not normally performed is generated.
    • 当从主计算机20接收到对磁盘驱动器210的数据写入请求时,产生并存储要响应于数据写入请求写入到磁盘驱动器210的写数据的第一错误检测码, 执行向磁盘驱动器210的写入数据,确定写入处理所需的响应时间是否超过预定阈值,作为写入数据的写入目的地的扇区中存储的数据从扇区读取时 响应时间超过阈值,生成读取数据的第二错误检测码,并且当第一错误检测码和第二错误检测码相互比较且两个码不相符时,信号 指示不正常执行写入处理。
    • 64. 发明申请
    • Storage apparatus and data verification methd in storage apparatus
    • 存储装置中的存储装置和数据验证方法
    • US20110185268A1
    • 2011-07-28
    • US12309138
    • 2008-12-22
    • Hiromi Matsushige
    • Hiromi Matsushige
    • H03M13/09G06F11/07
    • G06F11/0727G06F11/0757
    • When a data write request to a disk drive 210 is received from a host computer 20, a first error detecting code of write data to be written to the disk drive 210 in response to the data write request is generated and stored, write processing of the write data to the disk drive 210 is executed, whether or not response time as time required for the write processing exceeds a predetermined threshold value is determined, data stored in a sector as a writing destination of the write data is read from the sector when the response time exceeds the threshold value, a second error detecting code of the read data is generated, and when the first error detecting code and the second error detecting code are compared with each other and the two codes do not coincide with each other, a signal indicating that the write processing is not normally performed is generated.
    • 当从主计算机20接收到对磁盘驱动器210的数据写入请求时,产生并存储要响应于数据写入请求写入到磁盘驱动器210的写数据的第一错误检测码, 执行向磁盘驱动器210的写入数据,确定作为写入处理所需的时间的响应时间是否超过预定阈值,当存储在作为写入数据的写入目的地的扇区中存储的数据从扇区读取时 响应时间超过阈值,生成读取数据的第二错误检测码,并且当第一错误检测码和第二错误检测码相互比较且两个码不相符时,信号 指示不正常执行写入处理。
    • 66. 发明授权
    • Digital phase-locked loop circuit
    • 数字锁相环电路
    • US5841303A
    • 1998-11-24
    • US742678
    • 1996-10-31
    • Terumi TakashiKazunori IwabuchiMinoru KosugeHiromi MatsushigeHideki Miyasaka
    • Terumi TakashiKazunori IwabuchiMinoru KosugeHiromi MatsushigeHideki Miyasaka
    • H03K5/00H03L7/06H03L7/08H03L7/093H03L7/10H03L7/085
    • H03L7/10H03L7/093
    • Count pulses CTP from a counter 15 are supplied to a phase detector 3 through a two-frequency-divider 17 to produce measurement data N.sub.1 representing a difference in phase from a synchronized peak pulses PK. In a subtractor 4, the measurement data N.sub.1 is compensated with error data Ne from a register 13 in order to reduce the number of steady-state phase errors. An internal phase error .DELTA.N produced by the subtractor 4 is supplied to an LPF 5, undergoing compensation processing in a digital filter 7 thereof. The LPF 5 also includes a phase compensator 6 and a period compensator for compensating a control delay experience by the internal phase error .DELTA.N in the digital filter 7. An integer part OPD1 of counter oscillation period data OPD output by the LPF 5 is used for determining an oscillation period of a counter 15 whereas a fraction part OPD2 thereof is accumulated in a register 12 through an adder 11. An error accumulated in a register 12 is transferred to a register 13 and stored therein as error data Ne. Accordingly, the acquisition time is shortened and the number of steady-state errors is also reduced as well.
    • 来自计数器15的计数脉冲CTP通过双分频器17被提供给相位检测器3,以产生表示与同步峰值脉冲PK相位相差的测量数据N1。 在减法器4中,为了减少稳态相位误差的数量,从寄存器13补偿测量数据N1的误差数据Ne。 由减法器4产生的内部相位误差DELTA N被提供给在其数字滤波器7中进行补偿处理的LPF 5。 LPF5还包括相位补偿器6和周期补偿器,用于通过数字滤波器7中的内部相位误差DELTA N来补偿控制延迟体验。由LPF 5输出的计数器振荡周期数据OPD的整数部分OPD1用于 确定计数器15的振荡周期,而其分数部分OPD2通过加法器11积累在寄存器12中。寄存器12中累积的误差被传送到寄存器13并存储在其中作为误差数据Ne。 因此,采集时间缩短,稳态误差的数量也减少。
    • 67. 发明授权
    • Magnetic disk drive including a data discrimination apparatus capable of
correcting signal waveform distortion due to intersymbol interference
    • 磁盘驱动器包括能够校正由于符号间干扰引起的信号波形失真的数据鉴别装置
    • US5625632A
    • 1997-04-29
    • US319725
    • 1994-10-07
    • Yoshiteru IshidaKazunori IwabuchiHideyuki YamakawaHiromi Matsushige
    • Yoshiteru IshidaKazunori IwabuchiHideyuki YamakawaHiromi Matsushige
    • G11B20/10G06F11/10H03M13/00
    • G11B20/10009
    • A data discrimination apparatus which is capable of correcting a decrease in amplitude of a signal to be data discriminated by a correction value so as to correct the bit itself which was used as a target bit to determine the correction value. A decision circuit preliminarily classifies an equalizer output into symbols "0" and "1" to obtain a run length of the symbol "0" with respect to a given symbol "1" (the target bit). A correction value generating circuit includes a memory device which contains correction values in correspondence with all the possible values of the run length, and outputs one of the correction values out of the memory device in response to an output from the decision circuit. A delay circuit delays the equalizer output by a time which is required until the correction value is output. An operation circuit adds the selected correction value to the delayed equalizer output, to correct the same. The thus corrected equalizer output is data discriminated in a data discrimination circuit, with a lowered error rate owing to the correction.
    • 一种数据识别装置,其能够校正由校正值识别的要被数据的信号的幅度的降低,以便校正用作目标位的位本身以确定校正值。 判定电路预先将均衡器输出分类为符号“0”和“1”,以获得相对于给定符号“1”(目标位)的符号“0”的游程长度。 校正值产生电路包括存储器件,其存储与游程长度的所有可能值相对应的校正值,并且响应于来自判定电路的输出将一个校正值输出存储器件。 延迟电路使均衡器输出延迟所需的时间,直到校正值被输出。 操作电路将所选择的校正值与延迟均衡器输出相加,以校正相同的值。 这样校正的均衡器输出是在数据鉴别电路中鉴别的数据,由于校正而导致的误差率降低。
    • 68. 发明授权
    • Method and apparatus for signal detection in a magnetic recording and
reproducing apparatus
    • 在磁记录和再现装置中用于信号检测的方法和装置
    • US5231544A
    • 1993-07-27
    • US646670
    • 1991-01-28
    • Hiromi Matsushige
    • Hiromi Matsushige
    • G11B20/10G11B20/14
    • G11B20/10009G11B20/1426
    • A signal detection circuit of a magnetic recording and reproducing apparatus generates a clock signal synchronized with peaks of a reproduced signal read from a magnetic recording medium on which data have been recorded by a (d, k) run-length code, and determines "1" or "0" with respect to a discrimination threshold based on an absolute value of a peak of the reproduced waveform at a timing synchronized with the clock signal. The signal detection circuit comprises a quantizer for quantizing the reproduced signal in synchronism with the clock signal to produce a quantized signal, a multi-stage shift register for delaying the clock signal in synchronism with the clock signal, and threshold generation means for comparing the quantized signal supplied from the final stage of the multi-stage shift register and the quantized signal representing the current threshold to dynamically generate a new relevant threshold in accordance with the difference in the comparison.
    • 磁记录和重放装置的信号检测电路产生与通过(d,k)游程长度码记录有数据的磁记录介质读出的再现信号的峰值同步的时钟信号,并确定“1 基于与时钟信号同步的定时的再生波形的峰值的绝对值,判定阈值为“或”0“。 信号检测电路包括量化器,用于与时钟信号同步地量化再现信号以产生量化信号;多级移位寄存器,用于与时钟信号同步地延迟时钟信号;以及阈值产生装置,用于将量化的信号 从多级移位寄存器的最后级提供的信号和表示当前阈值的量化信号,以根据比较的差异动态生成新的相关阈值。
    • 69. 发明授权
    • Digital phase-looked loop circuit
    • 数字相位环路电路
    • US5572157A
    • 1996-11-05
    • US21854
    • 1993-02-24
    • Terumi TakashiKazunori IwabuchiMinoru KosugeHiromi MatsushigeHideki Miyasaka
    • Terumi TakashiKazunori IwabuchiMinoru KosugeHiromi MatsushigeHideki Miyasaka
    • H03K5/00H03L7/06H03L7/08H03L7/093H03L7/10H03L7/085
    • H03L7/10H03L7/093
    • Count pulses CTP from a counter 15 are supplied to a phase detector 3 through a two-frequency-divider 17 to produce measurement data N.sub.1 representing a difference in phase from a synchronized peak pulses PK. In a subtractor 4, the measurement data N.sub.1 is compensated with error data Ne from a register 13 in order to reduce the number of steady-state phase errors. An internal phase error .DELTA.N produced by the subtractor 4 is supplied to an LPF 5, undergoing compensation processing in a digital filter 7 thereof. The LPF 5 also includes a phase compensator 6 and a period compensator 8 for compensating a control delay experience by the internal phase error .DELTA.N in the digital filter 7. An integer part OPD1 of counter oscillation period data OPD output by the LPF 5 is used for determining an oscillation period of a counter 15 whereas a fraction part OPD2 thereof is accumulated in a register 12 through an adder 11. An error accumulated in a register 12 is transferred to a register 13 and stored therein as error data Ne. Accordingly, the acquisition time is shortened and the number of steady-state errors is also reduced as well.
    • 来自计数器15的计数脉冲CTP通过双分频器17被提供给相位检测器3,以产生表示与同步峰值脉冲PK相位相差的测量数据N1。 在减法器4中,为了减少稳态相位误差的数量,从寄存器13补偿测量数据N1的误差数据Ne。 由减法器4产生的内部相位误差DELTA N被提供给在其数字滤波器7中进行补偿处理的LPF5。 LPF5还包括相位补偿器6和周期补偿器8,用于通过数字滤波器7中的内相位误差DELTA N补偿控制延迟体验。使用由LPF 5输出的计数器振荡周期数据OPD的整数部分OPD1 用于确定计数器15的振荡周期,而其分数部分OPD2通过加法器11积累在寄存器12中。寄存器12中累积的误差被传送到寄存器13并作为误差数据Ne存储。 因此,采集时间缩短,稳态误差的数量也减少。