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1. 发明授权

US5657176A Method and apparatus for optimizing the recording and reproducing of information from magnetic disks 失效
标题翻译：用于优化从磁盘记录和再现信息的方法和装置
公开(公告)号：US5657176A
公开(公告)日：1997-08-12
申请号：US471460
申请日：1995-06-06
申请人： Yoshihiro Moribe , Tetsuji Kameoka , Toshiaki Tsuyoshi , Sumio Obata
发明人： Yoshihiro Moribe , Tetsuji Kameoka , Toshiaki Tsuyoshi , Sumio Obata
IPC分类号： G11B5/00 , G11B5/012 , G11B5/02 , G11B5/09 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/36
CPC分类号： G11B20/10009 , G11B20/1258 , G11B27/36 , G11B5/012 , G11B5/02 , G11B5/09 , G11B20/1833 , G11B2005/0013
摘要： Increased memory capacity for a magnetic disk device is realized without degrading information error rate, by making the number of sectors at a given circumference of the disk variable in accordance with a radial direction of a disk. The number of sectors is made variable by deciding a predetermined information error rate from a ratio of reproduced signal output to noises of head, disk and amplifier at a maximum recording and reproducing frequency at a certain radial position along a disk.
摘要翻译：通过使磁盘的给定周长处的扇区数根据磁盘的径向方向变化，实现磁盘装置的增加的存储器容量而不降低信息错误率。通过从沿着盘的特定径向位置处的最大记录和再现频率的重放信号输出到磁头，磁盘和放大器的噪声的比率确定预定的信息错误率，使扇区数变化。

2. 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。

3. 发明授权

US5953178A Magnetic disk apparatus 失效
标题翻译：磁盘装置
公开(公告)号：US5953178A
公开(公告)日：1999-09-14
申请号：US977942
申请日：1997-11-24
申请人： Akio Takatsuka , Hideaki Amano , Katsuhiro Tsuneta , Toshiaki Tsuyoshi , Tetsuji Kameoka , Haruhiko Hosokawa , Takashi Yamaguchi , Kazuyoshi Hanada , Satoru Yamaura , Toshio Matsushita , Toshihisa Okazaki
发明人： Akio Takatsuka , Hideaki Amano , Katsuhiro Tsuneta , Toshiaki Tsuyoshi , Tetsuji Kameoka , Haruhiko Hosokawa , Takashi Yamaguchi , Kazuyoshi Hanada , Satoru Yamaura , Toshio Matsushita , Toshihisa Okazaki
IPC分类号： G11B5/012 , G11B5/39 , G11B5/48 , G11B5/55 , G11B5/596 , G11B19/02 , G11B27/30
CPC分类号： G11B5/5526 , G11B19/02 , G11B27/3027 , G11B5/012 , G11B5/4886 , G11B5/59655 , G11B5/59683 , G11B2220/20 , G11B5/39
摘要： A magnetic disk apparatus includes a dual head equipped with an MR head for reading data and an inductive head for writing the data. One ID portion and one servo pattern are disposed in one sector and an unequal track pitch is formed. The ID portion is formed at the center of a radius of two positions to which the MR head is positioned at the time of reading the data and writing the data, respectively.
摘要翻译：磁盘装置包括配有用于读取数据的MR磁头和用于写入数据的感应头的双头。一个ID部分和一个伺服图案设置在一个扇区中，并且形成不等轨道间距。在读取数据并写入数据时，ID部分形成在MR头位于两个位置的半径的中心处。

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