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1. 发明授权

US4907100A Readout circuit in magnetic recording device 失效
标题翻译：磁记录装置中的读出电路
公开(公告)号：US4907100A
公开(公告)日：1990-03-06
申请号：US248123
申请日：1988-09-23
申请人： Nobumasa Nishiyama , Makoto Saito , Yasuhide Ouchi , Yasuhiro Katoh , Yoshihasa Kamo , Makoto Koizumi , Hajime Aoi , Naoki Sato , Reijiro Tsuchiya
发明人： Nobumasa Nishiyama , Makoto Saito , Yasuhide Ouchi , Yasuhiro Katoh , Yoshihasa Kamo , Makoto Koizumi , Hajime Aoi , Naoki Sato , Reijiro Tsuchiya
IPC分类号： G11B5/035 , G11B20/10 , G11B20/18
CPC分类号： G11B20/10212 , G11B20/182 , G11B5/035
摘要： A readout circuit in magnetic recording device is disclosed, in which a test data signal for detecting an error in the characteristics of an automatic equalizer is recorded in a predetermined position of each track of a magnetic recording medium. In readout mode, a test data signal for a selected track is read out first, and this signal is compared with a reference signal dependent on the system conditions to determine an error from the reference signal. The optimum equalization coefficient is determined to eliminate this error from the reference signal and is set in the equalizer. The data is readout under the optimum equalization characteristics thus set.
摘要翻译：公开了一种磁记录装置中的读出电路，其中用于检测自动均衡器的特性误差的测试数据信号被记录在磁记录介质的每个磁迹的预定位置。在读出模式下，首先读取所选轨道的测试数据信号，并根据系统条件将该信号与参考信号进行比较，以确定参考信号的误差。确定最佳均衡系数以从参考信号中消除该误差，并将其设置在均衡器中。在如此设置的最佳均衡特性下读出数据。

2. 发明授权

US5008761A Readout circuit in magnetic recording device 失效
标题翻译：磁记录装置中的读出电路
公开(公告)号：US5008761A
公开(公告)日：1991-04-16
申请号：US489322
申请日：1990-03-05
申请人： Nobumasa Nishiyama , Makoto Saito , Yasuhide Ouchi , Yasuhiro Katoh , Yoshihisa Kamo , Makoto Koizumi , Hajime Aoi , Naoki Sato , Reijiro Tsuchiya
发明人： Nobumasa Nishiyama , Makoto Saito , Yasuhide Ouchi , Yasuhiro Katoh , Yoshihisa Kamo , Makoto Koizumi , Hajime Aoi , Naoki Sato , Reijiro Tsuchiya
IPC分类号： G11B5/035 , G11B20/10 , G11B20/18
CPC分类号： G11B20/10212 , G11B20/182 , G11B5/035
摘要： A readout circuit in magnetic recording device is disclosed, in which a test data signal for detecting an error in the characteristics of an automatic equalizer is recorded in a predetermined position of each track of a magnetic recording medium. In readout mode, a test data signal for a selected track is read out first, and this signal is compared with a reference signal dependent on the system conditions to determine an error from the reference signal. The optimum equalization coefficient is determined to eliminate this error from the reference signal and set in the equalizer. The data is readout under the optimum equalization characteristics thus set.

3. 发明授权

US4823208A Multi slice level signal circuit 失效
标题翻译：多层电平信号电路
公开(公告)号：US4823208A
公开(公告)日：1989-04-18
申请号：US76009
申请日：1987-07-21
申请人： Yasuhide Ouchi , Hajime Aoi , Nobumasa Nishiyama , Takashi Tamura , Makoto Saitoh , Reijiro Tsuchiya
发明人： Yasuhide Ouchi , Hajime Aoi , Nobumasa Nishiyama , Takashi Tamura , Makoto Saitoh , Reijiro Tsuchiya
IPC分类号： G11B20/10 , G11B5/09
CPC分类号： G11B20/10009
摘要： A signal read out circuit included in a magnetic recording device is disclosed in which plural kinds of slice levels are used simultaneously for a reproduced analog waveform to produce a plurality of gate signals corresponding to the slice levels, and it is judged on the basis of the gate signals whether each portion of the reproduced waveform is correct or not in producing a digital output.
摘要翻译：公开了包括在磁记录装置中的信号读出电路，其中同时使用多种切片电平用于再现的模拟波形，以产生与切片电平相对应的多个门信号，并且基于门信号是否产生数字输出，再现波形的每个部分是否正确。

4. 发明授权

US4774601A Read channel for magnetic recording 失效
标题翻译：读取磁记录通道
公开(公告)号：US4774601A
公开(公告)日：1988-09-27
申请号：US940494
申请日：1986-12-10
申请人： Yasuhide Ouchi , Hajime Aoi , Takashi Tamura , Nobumasa Nishiyama
发明人： Yasuhide Ouchi , Hajime Aoi , Takashi Tamura , Nobumasa Nishiyama
IPC分类号： G11B5/09 , G11B20/10
CPC分类号： G11B20/10009 , G11B20/10
摘要： In a read channel for magnetic recording used to reproduce information recorded on a magnetic recording medium, a signal reproduced from a magnetic head and a differentiated signal of the reproduction signal are ORed together to produce a gate signal. By using the gate signal, the information can be reproduced correctly.
摘要翻译：在用于再现记录在磁记录介质上的信息的用于磁记录的读取通道中，从磁头再现的信号和再现信号的微分信号被或者并联在一起以产生一个门信号。通过使用门信号，可以正确地再现信息。

5. 发明授权

US4644424A Equalizer used for magnetic storage device 失效
标题翻译：用于磁存储设备的均衡器
公开(公告)号：US4644424A
公开(公告)日：1987-02-17
申请号：US685118
申请日：1984-12-21
申请人： Nobumasa Nishiyama , Hajime Aoi , Takashi Tamura , Yasuhide Ouchi , Makoto Saitou
发明人： Nobumasa Nishiyama , Hajime Aoi , Takashi Tamura , Yasuhide Ouchi , Makoto Saitou
IPC分类号： G11B5/035 , G11B5/09 , H03H15/00 , H03H17/00 , H03H21/00 , H04B3/04 , G11B5/02 , H03H11/06 , H04B3/14
CPC分类号： G11B5/035 , G11B5/09
摘要： An equalizer equalizes a reproduced waveform reproduced by a thin film magnetic head by reproducing information recorded magnetically on a medium. In the equalizer, the reproduced waveform is delayed to a position of an undershot portion, and is attenuated to an amplitude corresponding to a magnitude of the undershot portion, and the resultant waveform is superposed on the reproduced waveform, to thereby eliminate the undershot portion. Furthermore, by superposing a waveform obtained by inverting the reproduced waveform and amplifying or attenuating the inverted waveform, on the reproduced waveform at a half power position thereof, the width is narrowed.
摘要翻译：均衡器通过再现磁介质上记录的信息来均衡由薄膜磁头再现的再现波形。在均衡器中，再生波形被延迟到下方的位置，并且被衰减到对应于低音部分的幅度的振幅，并且所得到的波形叠加在再现波形上，从而消除了低音部分。此外，通过叠加通过反转再现波形而获得的波形并放大或衰减反相波形，在其半功率位置处的再现波形上，宽度变窄。

6. 发明授权

US6014275A Magnetic recording drive 失效
标题翻译：磁记录驱动
公开(公告)号：US6014275A
公开(公告)日：2000-01-11
申请号：US701705
申请日：1996-08-22
申请人： Hajime Aoi , Toshiaki Tsuyoshi , Makoto Koizumi , Nobumasa Nishiyama , Yoshibumi Matsuda , Takuji Ogawa , Kazuhisa Shiraishi
发明人： Hajime Aoi , Toshiaki Tsuyoshi , Makoto Koizumi , Nobumasa Nishiyama , Yoshibumi Matsuda , Takuji Ogawa , Kazuhisa Shiraishi
IPC分类号： G11B5/02 , G11B5/00 , G11B5/012 , G11B5/09 , G11B5/39 , G11B5/40 , G11B5/55 , G11B5/596 , G11B19/02 , G11B19/04 , G11B27/30 , G11B27/36 , G11B5/03
CPC分类号： G11B19/04 , G11B19/02 , G11B27/3027 , G11B27/36 , G11B5/00 , G11B5/012 , G11B5/40 , G11B5/5547 , G11B2005/0016 , G11B2005/0018 , G11B5/59683
摘要： In a magnetic recording drive having a plurality of magnetic heads each employing a magnetoresistive sensor for the purpose of averaging the time required for sense currents to be caused to flow through the respective magnetoresistive sensors to shorten the longest reproducing time and to suppress the degradation of the characteristics due to the electromigration, thereby improving the reliability of the magnetic recording drive, the magnetic recording drive includes circuits for averaging the useful life depending on the currents caused to flow through the respective magnetoresistive sensors among the plurality of magnetic heads, whereby the time required for the sense current to be caused to flow through one MR reproducing head is greatly shortened. Therefore, the levels of outputs of the MR reproducing heads can be increased without reduction of the reliability and thus the reliability of the magnetic recording drive can be improved.
摘要翻译：在具有多个磁头的磁记录驱动器中，每个磁头采用磁阻传感器，用于平均要使感应电流流过各磁阻传感器所需的时间，以缩短最长再现时间并抑制由于电迁移的特性，从而提高了磁记录驱动器的可靠性，磁记录驱动器包括用于根据流过多个磁头中的相应磁阻传感器的电流来平均使用寿命的电路，由此所需的时间使得通过一个MR再现头流动的感测电流大大缩短。因此，可以在不降低可靠性的情况下增加MR再现头的输出电平，从而可以提高磁记录驱动器的可靠性。

7. 发明授权

US6069762A Magnetic recording drive having arrangement for averaging useful life of magnetoresistive effect sensors 有权
标题翻译：具有用于平均磁阻效应传感器的使用寿命的装置的磁记录驱动器
公开(公告)号：US6069762A
公开(公告)日：2000-05-30
申请号：US350139
申请日：1999-07-09
申请人： Hajime Aoi , Toshiaki Tsuyoshi , Makoto Koizumi , Nobumasa Nishiyama , Yoshibumi Matsuda , Takuji Ogawa , Kazuhisa Shiraishi
发明人： Hajime Aoi , Toshiaki Tsuyoshi , Makoto Koizumi , Nobumasa Nishiyama , Yoshibumi Matsuda , Takuji Ogawa , Kazuhisa Shiraishi
IPC分类号： G11B5/02 , G11B5/00 , G11B5/012 , G11B5/09 , G11B5/39 , G11B5/40 , G11B5/55 , G11B5/596 , G11B19/02 , G11B19/04 , G11B27/30 , G11B27/36 , G11B15/12 , G11B5/127
CPC分类号： G11B19/04 , G11B19/02 , G11B27/3027 , G11B27/36 , G11B5/00 , G11B5/012 , G11B5/40 , G11B5/5547 , G11B2005/0016 , G11B2005/0018 , G11B5/59683
摘要： In a magnetic recording drive having a plurality of magnetic heads each employing a magnetoresistive sensor for the purpose of averaging the time required for sense currents to be caused to flow through the respective magnetoresistive sensors to shorten the longest reproducing time and to suppress the degradation of the characteristics due to the electromigration, thereby improving the reliability of the magnetic recording drive, the magnetic recording drive includes circuits for averaging the useful life depending on the currents caused to flow through the respective magnetoresistive sensors among the plurality of magnetic heads, whereby the time required for the sense current to be caused to flow through one MR reproducing head is greatly shortened. Therefore, the levels of outputs of the MR reproducing heads can be increased without reduction of the reliability and thus the reliability of the magnetic recording drive can be improved.
摘要翻译：在具有多个磁头的磁记录驱动器中，每个磁头采用磁阻传感器，用于平均要使感应电流流过各磁阻传感器所需的时间，以缩短最长再现时间并抑制由于电迁移的特性，从而提高了磁记录驱动器的可靠性，磁记录驱动器包括用于根据流过多个磁头中的相应磁阻传感器的电流来平均使用寿命的电路，由此所需的时间使得通过一个MR再现头流动的感测电流大大缩短。因此，可以在不降低可靠性的情况下增加MR再现头的输出电平，从而可以提高磁记录驱动器的可靠性。

8. 发明授权

US5572379A Magnetic recording drive having arrangements for average useful life of magnetorestive effects sensors 失效
标题翻译：磁记录驱动器具有磁悬浮效应传感器的平均使用寿命的布置
公开(公告)号：US5572379A
公开(公告)日：1996-11-05
申请号：US305193
申请日：1994-09-13
申请人： Hajime Aoi , Toshiaki Tsuyoshi , Makoto Koizumi , Nobumasa Nishiyama , Yoshibumi Matsuda , Takuji Ogawa , Kazuhisa Shiraishi
发明人： Hajime Aoi , Toshiaki Tsuyoshi , Makoto Koizumi , Nobumasa Nishiyama , Yoshibumi Matsuda , Takuji Ogawa , Kazuhisa Shiraishi
IPC分类号： G11B5/02 , G11B5/00 , G11B5/012 , G11B5/09 , G11B5/39 , G11B5/40 , G11B5/55 , G11B5/596 , G11B19/02 , G11B19/04 , G11B27/30 , G11B27/36 , G11B5/03 , G11B5/127 , G11B5/33
CPC分类号： G11B19/04 , G11B19/02 , G11B27/3027 , G11B27/36 , G11B5/00 , G11B5/012 , G11B5/40 , G11B5/5547 , G11B2005/0016 , G11B2005/0018 , G11B5/59683
摘要： In a magnetic recording drive having a plurality of magnetic heads each employing a magnetoresistive sensor for the purpose of averaging the time required for sense currents to be caused to flow through the respective magnetoresistive sensors to shorten the longest reproducing time and to suppress the degradation of the characteristics due to the electromigration, thereby improving the reliability of the magnetic recording drive, the magnetic recording drive includes circuits for averaging the useful life depending on the currents caused to flow through the respective magnetoresistive sensors among the plurality of magnetic heads, whereby the time required for the sense current to be caused to flow through one MR reproducing head is greatly shortened. Therefore, the levels of outputs of the MR reproducing heads can be increased without reduction of the reliability and thus the reliability of the magnetic recording drive can be improved.
摘要翻译：在具有多个磁头的磁记录驱动器中，每个磁头采用磁阻传感器，用于平均要使感应电流流过各磁阻传感器所需的时间，以缩短最长再现时间并抑制由于电迁移的特性，从而提高了磁记录驱动器的可靠性，磁记录驱动器包括用于根据流过多个磁头中的相应磁阻传感器的电流来平均使用寿命的电路，由此所需的时间使得通过一个MR再现头流动的感测电流大大缩短。因此，可以在不降低可靠性的情况下增加MR再现头的输出电平，从而可以提高磁记录驱动器的可靠性。

9. 发明授权

US5740142A Method and apparatus for fast transfer of data in recording and reproducing system 失效
标题翻译：用于在记录和再现系统中快速传送数据的方法和装置
公开(公告)号：US5740142A
公开(公告)日：1998-04-14
申请号：US691191
申请日：1996-08-05
申请人： Nobumasa Nishiyama , Hajime Aoi
发明人： Nobumasa Nishiyama , Hajime Aoi
IPC分类号： G11B20/10 , G11B7/00
CPC分类号： G11B20/10194 , G11B20/10
摘要： A fast data transfer system capable of eliminating the need to extremely increase the necessary transmission frequency band for the high-density recording and fast revolution rate of data recording and reproducing system has a recording and reproduced signal processor including an encoder/decoder, a disk enclosure including a parallel-to-serial converter, a record head, and a serial-to-parallel converter, and a transmission cable, and makes recording parallel data transfer from the encoder/decoder to a recording amplifier by shifting the phases of a plurality of recording signals and reproduced parallel data from the serial-to-parallel converter to the encoder/decoder by shifting the phases of a plurality of reproduced signals. The necessary transmission frequency on the transmission cable can be reduced by this parallel data transfer on the transmission cable. In addition, a record timing correction circuit can be provided on a parallel data transfer path.
摘要翻译：一种快速数据传输系统，其能够消除对数据记录和再现系统的高密度记录和快速转速极大增加所需传输频带的需要，具有包括编码器/解码器，磁盘盒包括并行到串行转换器，记录头和串行到并行转换器以及传输电缆，并且通过移动多个存储器的相位使得从编码器/解码器到记录放大器的记录并行数据传送通过移位多个再现信号的相位将串行到并行转换器的并行数据记录到编码器/解码器。传输电缆上的这种并行数据传输可以减少传输电缆所需的传输频率。此外，可以在并行数据传送路径上提供记录定时校正电路。

10. 发明授权

US5337198A Digital magnetic writing and reading apparatus 失效
标题翻译：数字磁读写装置
公开(公告)号：US5337198A
公开(公告)日：1994-08-09
申请号：US909997
申请日：1992-07-07
申请人： Nobumasa Nishiyama , Toshiaki Tsuyoshi , Hajime Aoi , Tetsuji Kameoka , Masaya Tanaka , Kazuhisa Shiraishi
发明人： Nobumasa Nishiyama , Toshiaki Tsuyoshi , Hajime Aoi , Tetsuji Kameoka , Masaya Tanaka , Kazuhisa Shiraishi
IPC分类号： G11B5/09 , G11B5/035
CPC分类号： G11B5/09 , G11B20/10046
摘要： A waveform equalizer for processing a signal read by a magnetic head from a magnetic written medium includes a slimming circuit which, in turn, has a first delay unit for delaying the read signal, a first attenuator connected in parallel with the first delay unit, a first differentiating circuit for receiving the output from the first delay unit and the output from the first attenuator, and a resistor connected to a first delay unit side input of the first differential circuit; and a pseudo-peak elimination circuit connected in series with the slimming circuit and including a circuit for separating the from the read signal the read signal or a signal reverse in phase to the read signal, a second delay unit for delaying the separated signal, a second attenuator for attenuating the amplitude of the separated signal, and a second differential circuit for receiving the read signal and the separated, delayed and attenuated signal.
摘要翻译：用于处理由磁性写入介质由磁头读取的信号的波形均衡器包括减弱电路，该减幅电路又具有用于延迟读取信号的第一延迟单元，与第一延迟单元并联连接的第一衰减器，用于接收来自第一延迟单元的输出和来自第一衰减器的输出的第一微分电路，以及连接到第一差分电路的第一延迟单元侧输入的电阻器; 以及与所述减肥电路串联连接的伪峰值消除电路，并且包括用于将读取信号或相反相反的信号与读取信号分离的读取信号的电路，用于延迟分离的信号的第二延迟单元，第二衰减器，用于衰减分离信号的振幅;以及第二差分电路，用于接收读取信号和分离的，延迟和衰减的信号。

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